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P2146 is a diagnostic trouble code (DTC) for "Fuel Injector Group “A” Supply Voltage Circuit/Open". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $114.99 . Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.0 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.
Fuel Injector Group “A” Supply Voltage Circuit/Open
P2146 is an OBD-II generic code for the engine control module (ECM) detecting that the fuel injector group “A” supply voltage circuit is open. This could be from bank 1 or the “A” supply voltage circuit that is open.
The engine control module (ECM) is getting a voltage return from the fuel injectors and monitors the supply voltage to the injectors. Some vehicles supply voltage in groups or banks. If the voltage supply circuit is open or zero volts, then the code P2146 is set and the Check Engine Light is turned on.
A broken wire or connector on supply voltage circuit
The Check Engine Light will be illuminated and the code is set in the ECM memory as a fault.
The engine will run very rough or stall.
The engine will be hard to start or will not stay running after starting.
Scans codes and documents the code in the ECM, then looks at the freeze frame data for failure.
Measures the voltage on the injector supply circuit
Diagnose and repairs code P2146 by following the manufacturer pinpoint tests
Checks the wiring and connector to the supply circuit for breaks or loose connections
Clearing ECM memory codes before checking the freeze frame data for the main failure problem, so the failure may be duplicated and repaired
Failing to clear the ECM codes after the codes are fixed
Failing to follow the pinpoint test completely causing the wrong part to be diagnosed
Code P2146 is a major failure in the fuel injector voltage supply circuit and will cause the engine to run very rough and misfire.
Code P2146 is for diesel and some gas motors and the failure may be the ECM and on some vehicles they may have a separate injector driver module that may cause the code.
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