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
Related codes
- P0370Timing Reference High Resolution Signal A
- P0379Timing Reference High Resolution Signal B No Pulses
- P0371Timing Reference High Resolution Signal A Too Many Pulses
- P0372Timing Reference High Resolution Signal A Too Few Pulses
- P0373Timing Reference High Resolution Signal A Intermittent/Erratic Pulses
- P0375Timing Reference High Resolution Signal B
- P0376Timing Reference High Resolution Signal B Too Many Pulses
- P0377Timing Reference High Resolution Signal B Too Few Pulses
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.