Engine stalling: Codes, Causes & Fixes

P0101 Powertrain The MAF sensor's airflow reading doesn't match what the engine computer expects… Low P0171 Powertrain The engine computer is adding the maximum extra fuel it's allowed on bank 1 and still sees… Moderate P0335 Powertrain The engine computer lost the crankshaft position signal. Expect stalling or a crank-no-start. High P0340 Powertrain The computer lost the camshaft signal on bank 1. Expect long cranking, less power… Moderate P0505 Powertrain The engine computer can't hold idle speed where it wants it – usually a dirty or sticking idle… Low P0562 Powertrain The engine computer sees too little supply voltage – usually a charging, battery or ground… Moderate

P0001 Powertrain The PCM can't drive the solenoid that meters fuel into the high-pressure pump. Often a no-start… High P0011 Powertrain The bank 1 intake cam sits further advanced than the PCM asked for, usually an oil or control… Moderate P0018 Powertrain The bank 2 intake cam is out of step with the crankshaft on a V or boxer engine; chain wear… High P0021 Powertrain The bank 2 intake cam is more advanced than commanded or slow to respond; compare it with bank… Moderate P0068 Powertrain The airflow the engine measures doesn't match what the throttle opening says it should be. Moderate P0087 Powertrain Measured fuel pressure has dropped well below what the engine computer is asking for. High P0089 Powertrain The fuel pressure regulator is getting its commands but pressure isn't responding the way it… Moderate P0090 Powertrain The engine computer sees an electrical fault in the wiring or coil of the fuel pressure control… Moderate P0093 Powertrain Rail pressure is dropping faster than injection explains: fuel may be escaping. Stop and check… Critical P0102 Powertrain The MAF signal is too weak for the PCM to accept, so it treats the circuit as dead… Moderate P0105 Powertrain The PCM lost a usable signal from the manifold pressure sensor: dropouts, noise or values it… Moderate P0107 Powertrain The MAP signal has fallen to almost zero volts, usually from a lost 5-volt reference or an open… Moderate P0120 Powertrain The throttle position signal dropped out or glitched, so the PCM no longer trusts the throttle… Moderate P0122 Powertrain The throttle position signal fell to nearly 0 volts, lower than a closed throttle could ever… Moderate P0170 Powertrain Bank 1 fuel correction is far outside its normal window, lean or rich, and the ECU won't say… Moderate P0171 Powertrain The engine computer is adding the maximum extra fuel it's allowed on bank 1 and still sees… Moderate P0190 Powertrain The signal from the fuel rail pressure sensor has dropped out or become unusable to the engine… Moderate P0191 Powertrain The rail pressure reading is electrically valid but doesn't make sense for how the engine… Moderate P0192 Powertrain The rail pressure sensor signal voltage has fallen below the lowest value a working sensor can… Moderate P0193 Powertrain The rail pressure sensor signal is stuck near the 5-volt limit, above anything a working sensor… Moderate P0200 Powertrain The ECU found a fault in the injector control circuits that it can't pin on one cylinder, often… High P0216 Powertrain The ECU can't control or confirm injection timing, usually on a diesel with an electronic… High P0221 Powertrain The second throttle angle signal leaves its window or stops following the plate, so power… Moderate P0230 Powertrain The engine computer found a fault in the circuit it uses to switch the fuel pump relay or pump… Moderate P0231 Powertrain Voltage on the wire feeding the fuel pump is too low while the pump is supposed to be running. High P0320 Powertrain The computer lost the engine speed (rpm) signal. The engine can stall suddenly or refuse… High P0321 Powertrain The rpm signal is there but erratic: extra or missing pulses the computer can't trust. Expect… Moderate P0335 Powertrain The engine computer lost the crankshaft position signal. Expect stalling or a crank-no-start. High P0336 Powertrain Crank signal present but implausible: damaged teeth, a slipped balancer ring or debris confuse… Moderate P0337 Powertrain The crank sensor signal line is stuck near 0 volts, usually a wire shorted to ground. Often… High