OBD-II code · Powertrain (generic)

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.

Is it safe to drive with P0374?

The car may go into limp mode (reduced power). Get it diagnosed before a long trip.

Common causes

  • Most likelySensor or wiring open

Repair at a glance

Difficulty
Medium
DIY friendly
Often, with basic tools
Typical labour
0.5–2.5 h
Emissions test
Likely to fail
Parts involved
Crankshaft Position Sensor

Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.