Error code

OBD2 P0378

OBD2P0378
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Timing Reference High Resolution Signal 'B' Intermittent/Erratic Pulses.

Severity

moderateCan drive, but may experience engine misfires or stalling issues.

Summary

P0378 indicates an issue with the high-resolution timing signal 'B', which is related to the crankshaft or camshaft position sensor (CKP/RPM/CMP) and its wiring.

Common Causes

  • Poor connection in wiring
  • Faulty CKP/RPM/CMP sensor

Fixes

  • Repairing the wiring connection or replacing the faulty CKP/RPM/CMP sensor.

FAQ

What does P0378 mean?

It means there's an issue with the high-resolution timing signal 'B', likely related to a problem with the crankshaft/camshaft position sensor or its wiring.

View source

Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.

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