P0371 Code - Timing Reference High Resolution Signal 'A' Too Many Pulses

What Does P0371 Mean?

If the PCM detects variations in the high resolution engine timing signal that exceed a predetermined number of degrees, a code will be stored and a service engine soon lamp may be illuminated. The maximum allowable number of degrees of variation may differ between manufacturers, vehicle lines, engine sizes/types, and transmission applications.

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What are the common causes of P0371 ?

Several problems may cause a P0371 code including:

• Damaged or defective camshaft position sensor
• Damaged or defective crankshaft position sensor
• Damaged or defective distributor cap sensor
• Damaged or defective crank and cam reluctor rings

How do you troubleshoot P0371 ?

Like the all engines, the car engine system employs specially developed hydraulic lifters (known as switching roller followers) for the P0371 code intake and exhaust valves. The lifters can be collapsed by disengaging an internal locking pin. The locking pin is disengaged using solenoids to alter oil pressure fed into the lifter.

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