P0374
Timing Reference High Resolution Signal A No Pulses
No pulses detected on timing reference signal A — open circuit, dead sensor, or air gap too wide.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Sensor or wiring openCommon
Parts involved
- Crankshaft Position Sensor
P0374 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.