Get the app
Quick access from your home screen.
DTC codes / P22xx · Fuel and air metering (injector circuits) / P225C
P225C means the engine computer has determined that the upstream nitrogen oxide (NOx) sensor on bank 1 is reporting a signal that is biased or stuck at an abnormally high value. The computer compares the sensor's output against expected values under known operating conditions and flags the circuit when the signal remains too high for too long.
Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.
Get the app
Quick access from your home screen.