What does code P1895 mean?

Q: What does code P1895 mean?

TCM To ECM Torque Reduction Circuit. P1895 on a GM vehicle means the transmission control module (TCM) has detected a fault in the dedicated circuit it uses to request torque reduction from the engine control module (ECM). The TCM commands the ECM to momentarily cut engine torque during shifts to protect the transmission, and this code sets when that request circuit is open, shorted, or not responding as expected.

DTC codes / GM codes / P1895

P1895 · GMTCM To ECM Torque Reduction Circuit

P1895 on a GM vehicle means the transmission control module (TCM) has detected a fault in the dedicated circuit it uses to request torque reduction from the engine control module (ECM). The TCM commands the ECM to momentarily cut engine torque during shifts to protect the transmission, and this code sets when that request circuit is open, shorted, or not responding as expected.

SystemPowertrain

Code typeGM specific

SeverityMedium

Fix difficultyProfessional

AreaTransmission

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