What does code P1293 mean?

Q: What does code P1293 mean?

CNG Pressure Sensor Voltage Too Low. P1293 on a GM vehicle indicates that the powertrain control module has detected a voltage signal from the compressed natural gas pressure sensor that is lower than the expected range for the current operating conditions. This typically means the sensor circuit is shorted to ground, the sensor itself has failed, or the CNG system pressure is genuinely too low for the sensor to produce a normal signal.

DTC codes / GM codes / P1293

P1293 · GMCNG Pressure Sensor Voltage Too Low

P1293 on a GM vehicle indicates that the powertrain control module has detected a voltage signal from the compressed natural gas pressure sensor that is lower than the expected range for the current operating conditions. This typically means the sensor circuit is shorted to ground, the sensor itself has failed, or the CNG system pressure is genuinely too low for the sensor to produce a normal signal.

SystemPowertrain

Code typeGM specific

SeverityMedium

Fix difficultyIntermediate

AreaFuel and air metering (injector circuits)

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