What does code P1405 mean?

Q: What does code P1405 mean?

EGR Valve Control Circuit. P1405 on GM vehicles indicates that the powertrain control module (PCM) has detected an electrical fault in the exhaust gas recirculation (EGR) valve control circuit. The PCM monitors the circuit for expected voltage or current changes when commanding the EGR valve; when the feedback does not match the command, it sets this code. This is a circuit-level fault, not a performance code, so the valve may not be moving at all or the wiring may be compromised.

DTC codes / GM codes / P1405

P1405 · GMEGR Valve Control Circuit

P1405 on GM vehicles indicates that the powertrain control module (PCM) has detected an electrical fault in the exhaust gas recirculation (EGR) valve control circuit. The PCM monitors the circuit for expected voltage or current changes when commanding the EGR valve; when the feedback does not match the command, it sets this code. This is a circuit-level fault, not a performance code, so the valve may not be moving at all or the wiring may be compromised.

SystemPowertrain

Code typeGM specific

SeverityMedium

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.