P0374
Timing Reference High Resolution Signal A No Pulses
Generic code
Ignition System
High severity
Moderate repair
Free on OBD DashX
Want real-world data on P0374?
See which problems come with P0374, how often it shows up in other vehicles, and how to fix it — step by step.
- Real-world fix data
- How often it happens
- Step-by-step repairs
What P0374 means
- The fault code P0374 indicates that the engine control module (ECM) has detected a malfunction within the high resolution timing reference signal A circuit. This may cause issues with engine performance and/or cause the engine to stall.
Possible symptoms
- Illuminated check engine light
- Engine stalls or fails to start
- Poor engine performance
- Reduced power or acceleration
Possible causes
- Wiring or connection issues in the high resolution timing reference signal A circuit
- Failed crankshaft position sensor
- Failed camshaft position sensor
- Failed engine control module (ECM)
Related parts
- Timing Reference Optical Sensor: The optical sensor monitors the pulses in the fuel injection pump. More fuel is necessary to keep the engine running correctly in this case due to the malfunctioning optical sensor
Possible solutions
- Inspect and repair any damaged wiring or connections in the high resolution timing reference signal A circuit
- Replace the crankshaft position sensor
- Replace the camshaft position sensor
- Replace the engine control module (ECM) if necessary
Free on OBD DashX
P0374 on OBD DashX
Real-world causes, how often this code shows up, and the fix — step by step.
Open P0374 No sign-up needed · available in 10 languagesScan your own car
Read and clear fault codes, live data and service resets with the CaRPM app.