Diagnostic Trouble Code – P2146/P2149
P2146/P2149 – Fuel Injector Group (A/B) Supply Voltage Circuit/Open
The Fuel Injection Control Module (FICM) supplies high voltage to each fuel injector on the ignition voltage circuits. The FICM energizes each fuel injector by grounding the command circuit between the FICM and the fuel injector. The FICM monitors the status of the ignition voltage circuits and the fuel injector command circuits. When a fuel injector circuit condition is detected by the FICM, all of the fuel injectors on the affected ignition voltage circuit will be disabled.
If a circuit condition is detected on a fuel injector circuit for cylinders 1, 4, 6, or 7, DTCs P0201, P0204, P0206, or P0207 will set, along with DTC P2146.
If a circuit condition is detected on a fuel injector circuit for cylinders 2, 3, 5, or 8, DTCs P0202, P0203, P0205, or P0208 will set, along with DTC P2149.
This is a GM specific code, isolating the circuit fault to a specific cylinder bank. For further diagnosis, see the page for DTCs P0201-P0208.
- Circuit fault/open
- Fuel injector
- Fuel filter