What does code P1433 mean?

Q: What does code P1433 mean?

Fuel Level Sensor 2 Circuit High Voltage. P1433 on a GM vehicle means the engine control module (ECM) has detected an abnormally high voltage on the signal circuit for fuel level sensor 2, which is the secondary sender used on vehicles with dual fuel tanks or a saddle-style tank. The ECM expects a voltage within a calibrated range as the fuel level changes, and a reading above the upper limit tells the module the circuit is open, shorted to voltage, or the sensor has failed.

DTC codes / GM codes / P1433

P1433 · GMFuel Level Sensor 2 Circuit High Voltage

P1433 on a GM vehicle means the engine control module (ECM) has detected an abnormally high voltage on the signal circuit for fuel level sensor 2, which is the secondary sender used on vehicles with dual fuel tanks or a saddle-style tank. The ECM expects a voltage within a calibrated range as the fuel level changes, and a reading above the upper limit tells the module the circuit is open, shorted to voltage, or the sensor has failed.

SystemPowertrain

Code typeGM specific

SeverityLow

Fix difficultyIntermediate

AreaAuxiliary emission controls

Guidance is general and written for GM vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.