GMC Yukon 2000–2006

Owner complaint2004 GMC YUKON ・ 2013-09-03

Slug buildup, oil pressure loss, and coolant loss

1. 1Fault

   • Leak
   ↓→

2. 2Finding the cause

   • Cylinder Head: broken
   ↓→

3. 3Correction

   • Slug: cleaned (says it came back)
   • Oil Pump: replaced (says it came back)

Manufacturer communication2001–2006 GMC YUKON DENALI ・ 2024-03-19

Internal Coolant Leak from Cylinder Head Location

1. 1Fault

   • Leak
   • Some vehicles may experience a gradual coolant loss over time.
   ↓→

2. 2Finding the cause

   Possible causes

   • A very low percentage of cylinder heads manufactured with an embossed Castech logo may develop a porosity crack in a very specific area.

   Steps to confirm (in the document’s order)

   1. Check whether the head is a Castech casting by looking for the casting logo on top of the intake port, under the rocker arm support rail and in the spring deck cavity portion of the cylinder head.
   2. If the head is a Castech casting, inspect the area around the five oil drain holes for witness marks indicating coolant seepage over time.
   3. The crack can be in any of the five cylinder head oil drains and shows as a clean or shiny area on an otherwise stained surface.
   4. Pressurizing the cooling system at this time may reveal coolant, air, or a combination weeping in the described area.
   ↓→

3. 3Correction

   Repair

   • If inspection reveals evidence of coolant witness marks, replace the entire cylinder head assembly.

   Caution

   • If the cylinder heads are not a Castech casting, follow normal diagnostic procedures in SI to determine the cause of the coolant loss.
   • If no evidence of coolant loss is found on inspection of Castech casting cylinder heads, follow normal diagnostic procedures in SI to determine the cause of the coolant loss.

Recall2001 GMC YUKON ・ 2007-07-11

Crankshaft Position Sensor Failure Recall

1. 1Fault

   • Stalls or shuts off
   • The crankshaft position sensor can fail intermittently or permanently; if it fails intermittently, the Service Engine Soon (SES) light may illuminate and the vehicle may run rough.
   • The engine may also stall and may re-start immediately or after a cool down period; if the sensor fails permanently, the engine will quit running and will not re-start.
   • If this happens while the vehicle is moving, a crash could result without prior warning.
   ↓→

2. 2Finding the cause

   • Crankshaft Position Sensor: electrical fault
   • Crankshaft Position Sensor: failed

   Possible causes

   • Variations in the crankshaft position sensor manufacturing process caused an elevated rate of intermittent or inoperative sensors.
   ↓→

3. 3Correction

   • Crankshaft Position Sensor: replaced

   Repair

   1. Replace the engine crankshaft position sensor following the appropriate SI service procedure.
   2. The repair listed for the claim is: replace the crankshaft position sensor and perform the Crankshaft Position System Variation Learn.

   Parts

   • Part: 12575172 Sensor, Crankshaft Position, quantity 1 per vehicle.

   Part numbers printed in the document

   • 12575172Look up at RockAuto (aftermarket candidates) ↗Search the web ↗

   The numbers are as the document prints them. The name and the replacing number are what the pages of GMPartsGiant, a reseller of genuine parts and not GM, state. Aftermarket equivalents are not checked here (the links only search by number). Confirm the fit for the vehicle (VIN) before ordering.

   Caution

   • Vehicle eligibility is to be confirmed with the GM Vehicle Inquiry System (GMVIS) before beginning repairs; not all vehicles within the breakpoints may be involved.

Manufacturer communication2002–2006 GMC YUKON DENALI ・ 2023-05-06(1 earlier editions of this document folded here)

Diagnostic tip: valve, lifter or camshaft issue

1. 1Fault

   • Misfire or rough idle
   • Noise
   • Warning light
   • P0300
   • P0301
   • P0302
   • P0303
   • P0304
   • P0305
   • Misfire, chirp, squeak, squeal or tick noise, or MIL illuminated.
   • DTCs P0300 (engine misfire detected) and P0301 through P0308 (misfire detected on cylinders 1 through 8) are listed.
   ↓→

2. 2Finding the cause

   Possible causes

   • Possible causes: worn camshaft lobe and/or lifter roller, a sticking valve, valve leakage, a broken valve spring, or a collapsed AFM lifter.

   Steps to confirm (in the document’s order)

   1. A verified noise is not eliminated by canceling fuel injectors and occurs at camshaft speed (half of crankshaft speed).
   2. If applying pressure to the valve side of the rocker changes the noise, a lifter and/or cam lobe concern on that cylinder is most likely.
   3. Disconnect the coils and injectors on one bank, run the engine with that valve cover removed, back off the rocker arm a couple of turns and listen for a change in the noise.
   4. Measure cam lobe lift at the pushrod side of the rocker arm and compare with other rockers on the same bank; the misfiring or ticking cylinder should have clearly less lift.
   5. A good indicator of a sticking valve is misfires that keep counting on an aggressive deceleration with engine braking.

   1 more points
   ↓→

3. 3Correction

   Repair

   • If a worn camshaft lobe or lifter roller is found, replace the camshaft and all lifters, and the plastic lifter guide for the affected lifter.

   Caution

   • A damaged cam lobe is easy to overlook through the lifter bores, and unworn lifter rollers do not mean the cam lobes are okay; inspect both carefully.

Owner complaint2004 GMC YUKON DENALI ・ 2013-03-03

Stability control disabled and reduced engine power warnings with 5 MPH speed limit on startup

1. 1Fault

   • Loss of engine power, no acceleration
   • Warning light
   • Check engine / Service Engine Soon
   • Reduced Engine Power
   ↓→

2. 2Finding the cause

   Not stated

   ↓→

3. 3Correction

   • Accelerator Pedal Sensor: replaced (says it came back)
   • Throttle Body Connector: replaced (says it held for a while)

Owner complaint2002 GMC YUKON DENALI ・ 2003-06-11

Intermittent noise from right rear of vehicle; returned after exhaust system change

1. 1Fault

   • Noise
   ↓→

2. 2Finding the cause

   Not stated

   ↓→

3. 3Correction

   • Exhaust System: replaced (says it held for a while)

Manufacturer communication2000–2006 GMC YUKON DENALI ・ 2024-02-29(1 earlier editions of this document folded here)

Oil Cooler, Oil Cooler Lines, and Oil Tank Replacement Service Information

1. 1Fault

   Not stated

   ↓→

2. 2Finding the cause

   Possible causes

   • Debris from a damaged rod or main bearing is sent directly through the oil galleries and the components in the lubrication circuit.
   ↓→

3. 3Correction

   • Oil Cooler: replaced
   • Oil Cooler Line: replaced
   • Oil Tank: replaced

   Repair

   1. Whenever an engine assembly is replaced for a connecting rod or crankshaft main bearing failure, also replace the oil cooler, oil cooler lines, oil tank and turbocharger, if equipped.
   2. If the oil cooler is part of the radiator assembly, the radiator must be replaced along with the other required components.

   Caution

   • Reinstalling an oil cooler or cooler line from an engine with bearing failure debris may carry remaining debris into the new service engine.
   • Some service engines come with the oil cooler and/or oil cooler lines already attached; those need not be replaced.
   • Not every engine with bearing damage requires the oil cooler, lines or oil tank, or even the engine, to be replaced.

Manufacturer communication2005–2006 GMC YUKON DENALI ・ 2024-02-17(1 earlier editions of this document folded here)

Warranty Admin Service Bulletin - Engine/Transmission Replacement

1. 1Fault

   • Under GM Service Policies and Procedures, dealers are to perform the most cost economical repair when deciding between assembly repair and replacement.
   ↓→

2. 2Finding the cause

   Not stated

   ↓→

3. 3Correction

   This Warranty Admin service bulletin provides guidelines for Dealers Not Required and for Dealers Required to Contact the PQC for engine or transmission assembly replacement and explains the PQC process, GWM Transaction submission, vehicle service record retention and proper handling of assembly returns for Canadian Dealers only.

Manufacturer communication2000–2006 GMC YUKON DENALI ・ 2024-02-02

Piston Installation Procedure

1. 1Fault

   Not stated

   ↓→

2. 2Finding the cause

   Steps to confirm (in the document’s order)

   • Refer to the Engine Mechanical Specification in SI for the correct bore and piston specification.
   ↓→

3. 3Correction

   Repair

   1. When installing a piston into a cylinder, use a ring compressor sleeve or equivalent for best results.
   2. Choose a sleeve with a smooth radius that tapers down to the specific bore size.
   3. Select a size only slightly bigger than the piston diameter and not larger than the cylinder bore diameter.

   Caution

   • If a sleeve is unavailable in the needed size, a universal ring compressor will work but is more difficult to use.

Manufacturer communication2001–2005 GMC YUKON DENALI ・ 2023-12-11

Expanded Availability for Remanufactured Electronic Control Modules

1. 1Fault

   Not stated

   ↓→

2. 2Finding the cause

   Not stated

   ↓→

3. 3Correction

   Expanded Availability for Remanufacture and Return (R&R) Electronic Control Modules

Manufacturer communication2004–2006 GMC YUKON DENALI ・ 2023-11-22

Vibration Analysis Worksheet Service Bulletin

1. 1Fault

   • Vibration or shudder
   ↓→

2. 2Finding the cause

   Steps to confirm (in the document’s order)

   1. When diagnosing vibration, use the worksheet together with the Vibration Analysis - Road Testing procedure in the service information.
   2. Place the sensor where the vibration is felt: on the seat track for a seat complaint, on the steering column for a steering wheel complaint.
   3. Moving the sensor to other areas, look for the same Hz reading with the greatest amplitude.
   4. If a system balance was attempted and the vibration remains, check ring gear backlash at each tooth; readings should not vary more than 0.050 mm (0.002 in).
   5. Aluminum wheel/tire runout measured on the vehicle: maximum 0.030 in (.762 mm).

   2 more points
   ↓→

3. 3Correction

   This service bulletin provides a vibration analysis worksheet the technician can use in conjunction with the appropriate Vibration Analysis-Road testing procedure when diagnosing vibration concerns.

Manufacturer communication2000–2006 GMC YUKON DENALI ・ 2023-09-26

Normal Transmission Shift and Throttle Response Delay

1. 1Fault

   • Loss of engine power, no acceleration
   • A sag or hesitation may be noticed when coasting at low speeds of less than 24 km/h (15 mph) with a closed throttle and then aggressively applying the throttle.
   • With an automatic transmission, after a hard complete stop with a closed throttle immediately followed by an aggressive throttle opening, the downshifts may not be completed by the time the throttle is opened.
   • A sag or hesitation may also be noticed while cruising at highway speeds and then aggressively increasing the throttle, forcing a down-shift.
   ↓→

2. 2Finding the cause

   Possible causes

   • In this maneuver the throttle blade is opened slowly for up to 0.7 seconds, even though the accelerator is applied aggressively, to help minimize driveline lash and clunking.
   • As a result, approximately 0.5 seconds of zero torque may be commanded to allow the shift to first gear to occur.
   ↓→

3. 3Correction

   Caution

   • All of these conditions are a result of Torque Management and should be considered normal; no repairs should be attempted.

Manufacturer communication2000–2006 GMC YUKON DENALI ・ 2023-09-15

Engine Component Wear Service Guidelines

1. 1Fault

   • Some technicians may be replacing engines instead of repairing them and replacing worn components as needed.
   ↓→

2. 2Finding the cause

   Possible causes

   • The wear may be caused by the vehicle duty cycle, dust in the operating environment and local fuel quality.

   Steps to confirm (in the document’s order)

   1. Cylinder wall scratch: if a pick or fingernail cannot catch on it, the cylinder bore/engine block does not require replacement.
   2. With a scored piston, inspect for broken and/or stuck rings, and inspect the ring lands and cylinder wall for damage.
   3. When bearing failure is suspected, remove the oil filter and inspect it for excessive debris and damaged pleats.
   4. Minimal amounts of metal particles on the oil filter pleats should not pose a concern.
   5. Excessive metal particles or damaged filter pleats mean unfiltered oil with bearing debris may have been pumped into the oil galleries throughout the engine.
   ↓→

3. 3Correction

   Repair

   1. Minor scratching/scoring on camshaft lobes and/or camshaft bearing journals: the scored components can be replaced without replacing the engine assembly.
   2. Minor scratching/scoring on connecting rod bearings: the scored components can be replaced without replacing the engine assembly.
   3. A slightly scored piston can be replaced without replacing the engine assembly.

   Caution

   • If inspection reveals cylinder wall damage (excessive scoring or out-of-round), an engine replacement may be required.

Manufacturer communication2000–2006 GMC YUKON DENALI ・ 2023-04-12(1 earlier editions of this document folded here)

ACDelco Spin-On Oil Filter Torque Specification Notification

1. 1Fault

   • Leak
   • An oil leak from underneath the front of the vehicle after an earlier oil service; the leak can take several thousand miles to appear.
   ↓→

2. 2Finding the cause

   Possible causes

   • The oil may be leaking from between the oil filter gasket and the mounting surface.

   Steps to confirm (in the document’s order)

   • The filter may be very easy to remove, sometimes by hand.
   ↓→

3. 3Correction

   Repair

   1. Lubricate the new oil filter gasket with clean engine oil.
   2. Install the oil filter 1 full turn after the gasket contacts the sealing surface on the filter mounting flange.

Manufacturer communication2000–2006 GMC YUKON DENALI ・ 2023-01-06

EVAP Leak Diagnostic Service Bulletin (DTCs P0442/P0455)

1. 1Fault

   • Leak
   • Warning light
   • P0442
   • P0455 (general documents only)
   • The MIL is illuminated, and DTC P0442 (EVAP small leak detected) and/or P0455 (EVAP large leak detected) may be set in the ECM.
   ↓→

2. 2Finding the cause

   Possible causes

   • P0455 sets because of a large leak or a purge blockage: an unseated tube connection, a damaged tube, a canister vent valve stuck open, or a purge valve stuck closed.
   • P0442 sets because of a small leak, which can come from a purge valve stuck open or a canister vent valve stuck open.

   Steps to confirm (in the document’s order)

   1. Inspect every purge connection for proper installation, and look along the lines for damage or wear; if damage is seen, confirm it with the smoke test.
   2. Some leaks show only under pressure and some only under vacuum, so check both ways; cycling the purge and vent solenoids with GDS2 while inspecting may show a sticking valve.
   3. Critical connections to check include: purge tube to purge valve (at the intake manifold), purge tube to chassis EVAP line (rear of the engine, near the transmission), chassis EVAP line to canister, and fuel tank load line to canister.
   4. Also check the vent valve line at the vent valve, the fuel tank load line jumper connection near the fuel tank, and that the fuel tank cap is closed properly.
   5. If all connections are good, check the vent valve for a stuck-open position; if the vent valve works correctly, go on to the purge valve.

   1 more points
   ↓→

3. 3Correction

   Parts

   • No parts are required for this repair.

   Caution

   • For diagnostic instructions, DTC information and required tools, always follow the service information document for the vehicle and DTC being worked on.

Manufacturer communication2005–2006 GMC YUKON DENALI ・ 2022-12-06

Engine and Transmission Assembly Replacement Under Warranty Policy

1. 1Fault

   • The document gives the policies for U.S. dealers on engine and transmission assembly replacement under warranty, policy or Customer Enthusiasm.
   ↓→

2. 2Finding the cause

   Not stated

   ↓→

3. 3Correction

   This bulletin provides information on Policies Applicable to All U.S. Dealers for Engine and Transmission Assembly Replacement Under Warranty, Policy or Customer Enthusiasm and information on Submission of Warranty Transaction in Global Warranty Management.

Manufacturer communication2003–2006 GMC YUKON DENALI ・ 2022-10-11

OEM and Remanufactured Engine/Transmission ID Notification

1. 1Fault

   Not stated

   ↓→

2. 2Finding the cause

   Steps to confirm (in the document’s order)

   1. The engine bar code tag could be on a rocker arm cover, on the ends of a cylinder head, or on the oil pan or oil rail area of the engine.
   2. All remanufactured engines have a label on the right or left side of the block.
   3. On the 4.8L/5.3L/6.0L/6.2L (Gen III/Gen IV) engines the remanufactured engine label is on the left side of the block.
   ↓→

3. 3Correction

   Caution

   • If a piston must be replaced, measure the cylinder before ordering; most of these engines have oversized cylinders, and oversized piston ring packs are not available for service.
   • If crankshaft bearings must be replaced, measure the crankshaft before ordering; a crankshaft that has been turned must be replaced, together with all new standard size bearings.

Owner complaint2005 GMC YUKON ・ 2022-01-18

Blower motor control module continues to operate after vehicle shut off

1. 1Fault

   • Air conditioning or heater
   ↓→

2. 2Finding the cause

   • Blower Motor Control Module: failed
   ↓→

3. 3Correction

   The contact was able to drive the vehicle back home and had a mechanically inclined friend to disconnect the blower motor wiring harness. (1 more)

Owner complaint2003 GMC YUKON DENALI ・ 2013-10-19

Engine and traction control lights illuminating uphill

1. 1Fault

   • Warning light
   • Check engine / Service Engine Soon
   ↓→

2. 2Finding the cause

   Not stated

   ↓→

3. 3Correction

   • Throttle Body: replaced (says it came back)

Manufacturer communication2005–2006 GMC YUKON DENALI ・ 2024-09-05(2 earlier editions of this document folded here)

Engine Oil Consumption Service Information

1. 1Fault

   Not stated

   ↓→

2. 2Finding the cause

   Possible causes

   • Towing a trailer increases oil consumption and may put it outside the normal accepted rate given for an unloaded vehicle in personal use.
   • On vehicles usually driven short distances, less than 8 km (5 mi), especially in colder weather, unburned fuel and condensation may not evaporate out of the oil, and the dipstick may show the level as over-full.

   Steps to confirm (in the document’s order)

   1. Inspect the oil pan and engine covers for leakage due to over-tightened, damaged or out of place gaskets.
   2. Verify that the dipstick tube is fully seated in the block.
   3. Let the vehicle sit for at least 15 minutes after the engine has been shut off before reading the oil level.
   4. Verify that the positive crankcase ventilation (PCV) system is operating properly; blockages, restrictions or damage to it can increase oil use.
   5. Do not test oil economy until the vehicle has accumulated at least 6400 km (4000 mi).

   1 more points
   ↓→

3. 3Correction

   Repair

   • If the final evaluation shows the engine uses more than 0.946 liter (1 qt) in 3200 km (2000 mi), follow the published symptom diagnostics in the appropriate Service Manual.

   Caution

   • The accepted rate of oil consumption for these engines is 0.946 liter (1 qt) in 3200 km (2000 mi).
   • This rate does not apply to vehicles driven aggressively, at high RPM, at high speeds, or (for trucks) loaded; oil consumption under these conditions will be more.

Manufacturer communication2000–2006 GMC YUKON DENALI ・ 2024-07-16(1 earlier editions of this document folded here)

Fuel Injection Cleaner Kit Service Bulletin

1. 1Fault

   • Hard start or long crank
   • Misfire or rough idle
   • Does not start
   • Warning light
   • Check engine / Service Engine Soon
   • P0300
   • P0301
   • P0302
   • P0303
   • P0304
   • P0305
   • Rough idle, crank no start, extended crank or misfire, with the engine warning lamp on and DTC P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307 or P0308 set.
   • When the engine is cold, compression on multiple cylinders may be zero.
   • The engine may pop through the intake or exhaust while cranking, and the spark plugs may be fuel fouled.
   ↓→

2. 2Finding the cause

   Possible causes

   • Major carbon build-up on the intake and/or exhaust valves from fuel contamination or incomplete burning of the fuel; misfires should not appear before at least 8,000 km (5,000 mi).
   ↓→

3. 3Correction

   • Intake Valve: cleaned

   Repair

   1. If there is no valve damage and no cam follower out of place, perform the cleaning procedure to free sticking valves and remove carbon from the valves and pistons.
   2. If valves are damaged or cam followers are out of place, make the engine mechanical repairs first and then perform the cleaning procedure to prevent a return.
   3. Fill Cleaner Kit J-35800-A with about 650 ml (22 oz, 2 cans) of Air Intake, Combustion Chamber Cleaner and set the air pressure at the tool to 260 kPa (40 psi).
   4. With GDS 2 or a scan tool, command engine idle to 2000 rpm so the engine does not stall.
   5. With the engine at operating temperature in a well-ventilated area, slowly and carefully induce the cleaner into the engine, taking about 3 minutes.

   Parts

   • The Top Engine Cleaning Kit (ACDelco Air Intake, Valve and Combustion Chamber Cleaner and ACDelco Fuel System Cleaner 44K) is 19435372 for the U.S. and Canada.

   Part numbers printed in the document

   • 19435372MAINTENANCE KIT,FUEL SYSTEM ACDELCO 3-11OZLook up at RockAuto (aftermarket candidates) ↗Search the web ↗

     No successor statedas stated by GMPartsGiant (checked 2026-10-06) ↗

   The numbers are as the document prints them. The name and the replacing number are what the pages of GMPartsGiant, a reseller of genuine parts and not GM, state. Aftermarket equivalents are not checked here (the links only search by number). Confirm the fit for the vehicle (VIN) before ordering.

   Caution

   • Inducing too much cleaner at too low an RPM, or stalling the engine with too much cleaner at once, may hydro-lock the engine and bend a connecting rod.

Manufacturer communication2000–2006 GMC YUKON ・ 2023-09-18(1 earlier editions of this document folded here)

Misfire and DTC Codes Diagnostic Information

1. 1Fault

   • Misfire or rough idle
   • Warning light
   • P0300
   • P0308
   • P050D (general documents only)
   • With DTC P0300 - P0308 and/or P050D, use GDS and save the freeze frame records.
   ↓→

2. 2Finding the cause

   Steps to confirm (in the document’s order)

   1. Perform the relative compression test in the PICO NVH or Oscilloscope software; SI Document number 5518386 covers the procedure.
   2. If it passes the relative compression test, the concern is an ignition or fuel delivery issue.
   3. Check the ignition supply voltage to the ignition module/coil assemblies and also to the fuel injectors.
   4. Inspect the spark plugs for anything abnormal.
   5. Note the fuel trim values and on which bank, and compare actual MAF with calculated air flow.

   2 more points
   ↓→

3. 3Correction

   Caution

   • The injector balance procedure in GDS is only a preliminary test and its results should not decide injector replacement, especially with a low or no flow injector.

Owner complaint2004 GMC YUKON ・ 2025-03-05

Power loss and shaking while driving at 45 MPH; multiple repairs unsuccessful

1. 1Fault

   • Vibration or shudder
   • Warning light
   • Check engine / Service Engine Soon
   ↓→

2. 2Finding the cause

   • Throttle Body: failed
   ↓→

3. 3CorrectionNot repaired

   The vehicle was not repaired for the most recent failure.

Owner complaint2003 GMC YUKON ・ 2022-04-18

Multiple electrical and suspension failures, air bag warning on 2003 GMC Yukon

1. 1Fault

   • Gauge or instrument fault
   • Does not start
   ↓→

2. 2Finding the cause

   Not stated

   ↓→

3. 3Correction

   • Battery: replaced
   • Shock: replaced
   • Stabilizer: replaced

Owner complaint2000 GMC YUKON DENALI ・ 2014-07-11

Loss of power and hesitation on acceleration at highway speed

1. 1Fault

   • Loss of engine power, no acceleration
   • Reduced Engine Power
   ↓→

2. 2Finding the cause

   I HAVE LOOKED UP INFORMATION ON ISSUES THIS TRUCK HAS HAD AND 1 OF THEM IS REGISTERED UNDER NHTSA ID # 100032435 / PIP-4695.GM: LOSS OF POWER HESITATES ON ACCELERATION.

   ↓→

3. 3Correction

   • Coolant Temperature Sensor: replaced
   • Mass Air Flow Sensor: replaced
   • Oxygen Sensor: replaced
   • Throttle Body Sensor: replaced

Owner complaint2001 GMC YUKON ・ 2003-04-01

Cruise control failure and component replacements

1. 1Fault

   Not stated

   ↓→

2. 2Finding the cause

   • Stop Lamp Circuit: electrical fault
   ↓→

3. 3Correction

   • Powertrain Control Module: replaced
   • Serpentine Belt: replaced
   • Starter: replaced

Owner complaint2000 GMC YUKON ・ 2004-12-28

Sudden unexpected acceleration while driving

1. 1Fault

   WHILE DRIVING AT ANY SPEED THE VEHICLE SUDDENLY AND UNEXPECTEDLY ACCELERATED WITHOUT ANY WARNING.

   ↓→

2. 2Finding the cause

   • Throttle Body: failed
   ↓→

3. 3Correction

   • Accelerator Cable: replaced (says it came back)
   • Cruise Control Cable: replaced (says it came back)

Owner complaint2003 GMC YUKON ・ 2003-03-13

Check engine light displayed, engine enters reduced power mode

1. 1Fault

   • Loss of engine power, no acceleration
   • Warning light
   • Check engine / Service Engine Soon
   • Reduced Engine Power
   ↓→

2. 2Finding the cause

   Not stated

   ↓→

3. 3Correction

   • Accelerator Control Module: replaced (says it did not fix it)