Code result
P0377
Timing Reference High Resolution Signal B Too Few Pulses
High severity
What it means
Timing reference signal B delivers fewer pulses per crank revolution than expected — broken reluctor teeth, sensor air gap too wide, or tone wheel chipped.
Is it safe to drive?
No — stop driving
This code points to a problem that can cause damage or affect safety. Avoid driving and have the vehicle diagnosed promptly.
Most likely causes
Tone wheel teeth broken or sensor gap excessive
highOne of the most commonly reported causes for this code — check this first.
Related help
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