What does code P1685 mean?

Q: What does code P1685 mean?

Metering Oil Pump Stepping Motor Cont Circuit. P1685 on Mazda vehicles indicates that the powertrain control module (PCM) has detected an open or short circuit in the control circuit for the metering oil pump stepping motor. This motor precisely regulates oil flow in applications such as the rotary engine's metering oil pump system, and the PCM monitors the circuit for expected electrical behavior. When the signal is outside the expected range, the PCM stores this code and may illuminate the check engine light.

DTC codes / Mazda codes / P1685

P1685 · MazdaMetering Oil Pump Stepping Motor Cont Circuit

P1685 on Mazda vehicles indicates that the powertrain control module (PCM) has detected an open or short circuit in the control circuit for the metering oil pump stepping motor. This motor precisely regulates oil flow in applications such as the rotary engine's metering oil pump system, and the PCM monitors the circuit for expected electrical behavior. When the signal is outside the expected range, the PCM stores this code and may illuminate the check engine light.

SystemPowertrain

Code typeMazda specific

SeverityMedium

Fix difficultyProfessional

AreaComputer and output circuits

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