What does code P1502 mean?

Q: What does code P1502 mean?

Vehicle Speed Sensor Intermittent Malfunction. P1502 on a GM vehicle means the powertrain control module (PCM) has detected an intermittent signal from the vehicle speed sensor (VSS) circuit. The PCM expects a steady pulse train from the sensor, and when the signal drops out or becomes erratic for a brief period, it stores this code to flag the loss of reliable speed data.

DTC codes / GM codes / P1502

P1502 · GMVehicle Speed Sensor Intermittent Malfunction

P1502 on a GM vehicle means the powertrain control module (PCM) has detected an intermittent signal from the vehicle speed sensor (VSS) circuit. The PCM expects a steady pulse train from the sensor, and when the signal drops out or becomes erratic for a brief period, it stores this code to flag the loss of reliable speed data.

SystemPowertrain

Code typeGM specific

SeverityMedium

Fix difficultyIntermediate

AreaVehicle speed, idle control and auxiliary inputs

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