P0380 — Timing Reference High Resolution Signal B No Pulses
Drive with caution — fix soon.
What P0380 means
This code means the engine computer isn't receiving any pulses from the high-resolution timing reference signal (B), which it relies on for precise crankshaft or camshaft position and timing. It's usually caused by a failing timing reference sensor, damaged wiring or connectors, a poor ground, or a problem with the reluctor/tone ring. It's typically fixable by replacing the sensor or repairing the circuit.
Common symptoms
- Check engine light is on
- Engine stalls or is hard to start
- Rough idle or random misfires
- Hesitation or loss of power while driving
- Intermittent no-start conditions
Common causes
- Failed timing reference (crankshaft or camshaft) sensor
- Damaged wiring or corroded connectors in the circuit
- Poor ground connection in the sensor circuit
- Damaged or contaminated reluctor/tone ring
- Faulty engine control module (less common)
Typical repair cost
$150 – $500
Varies by vehicle and root cause.
Frequently asked questions
Can I keep driving with a P0380 code?
For short trips usually yes, but don't rely on it. This timing reference signal is critical to engine timing, and if it drops out completely the engine can stall or fail to start, so get it checked promptly.
How much does it cost to fix a P0380 code?
Most repairs land between $150 and $500. A wiring or connector repair is on the low end, while replacing the timing reference sensor with labor pushes toward the higher end.
Is a P0380 code serious?
It's moderate but worth taking seriously. The engine may run for now, but a missing timing reference signal can cause sudden stalling or a no-start, which is why prompt repair is recommended.
What does 'no pulses' mean in a P0380 code?
It means the computer expected a stream of timing pulses from the high-resolution reference sensor but received none. That usually points to a dead sensor, a broken wire, or a damaged tone ring rather than just a weak signal.