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P12A6 Powertrain · manufacturer code
P12A6 fault code: what 6 owners reported
P12A6 is a manufacturer-specific powertrain code (engine, transmission, fuel and emissions), so its exact definition belongs to the carmaker and is not in the generic OBD-II list. What it meant in practice is below, from 6 complaints owners filed with NHTSA. Updated November 9, 2026.
- 6owner reports
- 4car models
- 0mention a crash
- 0mention a fire
- 2019–2025model years
Which cars get code P12A6?
Every model whose owners mentioned P12A6 in a complaint, most reports first. Each year opens that car's full problem report. Popular models collect more reports because more of them are on the road.
Where does P12A6 show up?
By brand
- Chevrolet5
- GMC1
Component the owner filed it under
Is there a recall for P12A6?
The others concern the component owners file this code under (Electrical System) on the same cars; they may or may not relate to the code. Recall repairs are free; check your VIN at nhtsa.gov/recalls.
Electrical System: 12v/24v/48v Battery: Cables General Motors LLC (GM) is recalling certain 2019-2020 Chevrolet Silverado 1500 and GMC Sierra 1500 trucks. The battery positive (B+) cable rings may have been manufactured with excessive glue, potentially causing an intermittent electrical connection between the B+ cable and alternator.
2020 Chevrolet Silverado, 2020 GMC Sierra. Full risk and remedy on each car's report.
What happened when owners saw P12A6?
6 of the 6 reports, spread across the models above, as the owners wrote them. NHTSA removes names and VINs; long reports are trimmed. CarHooq has not verified individual claims.
…This incident also gave me a P0087, P12A6, P228A, and P228B error codes. I was able to restart the vehicle and make it home. The following day, the “Reduced Acceleration” message once again appeared. The vehicle is currently at the dealer awaiting diagnosis and repair.
The contact owns a 2021 Chevrolet Camaro. While attempting to start the vehicle, the vehicle failed to start. DTC: P12A6 (Fuel Pump Drive Control Module) failure was retrieved. An independent mechanic was contacted and advised the contact to jump-start the vehicle. The vehicle was then taken to the dealer, but it was not inspected. The contact was informed that the repair was not covered under Manufacturer Communication: N2525169000. The contact was advised to contact the manufacturer for assistance. The manufacturer was made aware of the failure but provided no assistance. Additionally, the repair was not covered under the recall. The failure mileage was approximately 59,000.
The contact owns a 2019 Chevrolet Equinox. The contact stated that the check engine warning light was illuminated. The vehicle was taken to an Advanced Auto Parts where a diagnostic test was performed and DTC U0101 and P12A6 were retrieved. The vehicle was then taken to a local independent mechanic where the vehicle was diagnosed, and the contact was informed that the transmission control module was faulty and needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The approximate failure mileage was 108,533.
Vehicle will not start due to known GM issues. This failure left my family stranded in cold dark unsafe area once already. If we were in the flow of traffic or had to leave an area immediately we would have been unable too. Known GM issue, engine fault code P12A6 fault code. Bulletin: PIP5719A discusses this issue. I am being told by the dealer there is a newer bulletin which advises ECM update. GM dealer is stating ECM software upgrade is required to resolve at owners expense. Owner is responsible for diagnostic fee in addition to repair costs. If the issue is not resolved vehicle may continue to experience starting failure and or other electrical problems. The night the vehicle left us…
Lost power while driving for 30 seconds. While on the interstate. Now truck battery has to be jumped to start. Dashboard giving out random codes. Check 4x4, check DEF( def is still at half full), check trailer( no trailer is connected) Took to dealership, 4 active codes P0336, P12A6, U029D, U029E. Test failed since code cleared U18D7, U18FE Current codes C1596, C15AC
THE ENGINE LIGHT HAS COME ON 3 TIMES WITH A TRUCK WITH ONLY 9000 MILES ON IT I TOOK IT TO THE DEALERSHIP WHO GAVE ME A CODE OF P12A6 THEY TOLD ME CHEVROLET IS AWARE OF THIS PROBLEM BUT HAS NOT COME UP WITH SOLUTION YET OR EVEN WROTE A PROGRAM TO REFLASH THE COMPUTER. NOW I HAVE A PAPER WEIGHT IN MY DRIVEWAY AND BEING THAT I LIVE IN A DUAL TOWN TRYING TO FIND A DEALERSHIP THAT WILL FIX IT AND PROVIDE RENTAL CAR OR TRUCK. THIS DEFECT CAN BE MULTIPLE REASONS WITH THE ENGINE HARNESS WIRES CHAFFING OR TORQUE CONVERTER OR TRANSMISSION PLUS THE WHOLE ELECTRICAL SYSTEM NOT CRANKING OVER THE TRUCK FROM WHAT I WAS TOLD LAST TIME. NOW I'M WAITING TILL 730 TO CALL A DEALERSHIP SEE IF THEY HAVE A ROLL…
P12A6: questions drivers ask
What does code P12A6 mean?
P12A6 is a manufacturer-specific powertrain code (engine, transmission, fuel and emissions), so its exact definition depends on the carmaker and is not in the generic OBD-II list. 6 owners reported it to NHTSA, most often for the Chevrolet Silverado (3), Chevrolet Camaro (1), Chevrolet Equinox (1); their reports describe what happened.
Which cars get code P12A6 most often?
In NHTSA owner complaints, P12A6 is mentioned most for the Chevrolet Silverado (3), Chevrolet Camaro (1), Chevrolet Equinox (1), across 4 models and model years 2019 to 2025. Popular models collect more reports because more of them are on the road.
Is there a recall for code P12A6?
No NHTSA recall text names P12A6 directly. 1 recall on the cars that report this code concerns the same component owners name most (Electrical System); they may or may not relate to the code. Check your VIN at nhtsa.gov/recalls.
What should I do if my car shows P12A6?
Write down when the code appeared and what the car did (warning lights, loss of power, noises, speed, weather). Check your VIN for open recalls at nhtsa.gov/recalls, ask a dealer or independent workshop to read the stored freeze-frame data before anyone clears the code, and keep the repair order. If the car loses power in traffic, stop driving it. CarHooq does not diagnose: these are owner reports and official recall notices, not repair advice.
How this page was made
CarHooq read the text of every owner complaint filed with NHTSA for 19 US and European brands (model years 2012 onwards) and picked out the diagnostic trouble codes owners wrote down. This page lists every mention of P12A6. Manufacturer codes have no public standard definition, so CarHooq shows only what owners reported. Nothing here is a diagnosis. More answers: the fault code FAQ. Data: NHTSA Office of Defects Investigation (public domain), retrieved November 9, 2026. How CarHooq reports are made.
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