What does code P1650 mean?

Q: What does code P1650 mean?

PCM Fault (Quad Driver 2). P1650 on GM vehicles means the Powertrain Control Module (PCM) has detected a fault in its internal Quad Driver 2 circuit, which is a solid-state switch inside the PCM that controls several outputs such as relays, solenoids, and the malfunction indicator lamp. The PCM monitors the driver's feedback voltage and sets this code when the circuit does not respond as expected, indicating a problem inside the PCM or in the wiring and devices that the driver controls.

DTC codes / GM codes / P1650

P1650 · GMPCM Fault (Quad Driver 2)

P1650 on GM vehicles means the Powertrain Control Module (PCM) has detected a fault in its internal Quad Driver 2 circuit, which is a solid-state switch inside the PCM that controls several outputs such as relays, solenoids, and the malfunction indicator lamp. The PCM monitors the driver's feedback voltage and sets this code when the circuit does not respond as expected, indicating a problem inside the PCM or in the wiring and devices that the driver controls.

SystemPowertrain

Code typeGM specific

SeverityMedium

Fix difficultyProfessional

AreaComputer and output circuits

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