What does code P0377 mean?
Too few pulses detected in timing reference signal B
OBD-II Code
P0377 — Timing Reference High Resolution Signal B Too Few Pulses
Too few pulses detected in timing reference signal B
Common symptoms
- Power loss
- hard or failed start
Possible causes
- Damaged reluctor
- missing teeth
- faulty sensor
Initial recommendation
Inspect reluctor wheel and replace sensor B if necessary.
Safety notice
This information is for guidance only and does not replace a physical vehicle inspection or diagnosis by a qualified mechanic. If the vehicle has severe power loss, smoke, a fuel odor, overheating, brake or steering problems, or any unsafe behavior, avoid driving it and seek professional inspection.
Analyze this code with MecaOBD
Use the app to combine code P0377 with your vehicle's actual symptoms for more complete diagnostic guidance.
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