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OBD CODES

CAR OBD CODES



OBD/DTC Search, e.g.P0370

CAR OBD CODES P0370

P0370 OBD Code Definition:
P0370 Timing Reference High Resolution Signal A Malfunction
P0370 OBD Code Description:

OBD Code P0370

Timing Reference High Resolution Signal “A

What’s mean?

OBD2 Code P0370 Definition:
The optical sensor provides a high resolution signal to the Powertrain Control Module (PCM) by counting pulses on the sensor disk located in the injection pump. The high resolution is one of the most important inputs by the PCM for fuel control and timing. This test monitors the number of high resolution pulses which have been missed (not detected). It’s based on a comparison between the number of pulses that were detected since the last pump cam pulse and the number of the pulses that should have occurred. There are approximately 64 high resolution pulses for every cam pulse. Symptoms

Possible sumptoms of P0370
– Engine Light ON (or Service Engine Soon Warning Light) Possible Causes

Possible causes of P0370
– Open or short in the optical sensor circuit – Optical sensor connector – Damaged optical sensor – Damaged PCM or ECM The Error code is generally activated on detection of the following conditions: A number of high resolution pulses missing (internal to PCM (64 to 1 ratio) per every 8 cam reference pulses. Possible Solutions

– If damage, repair optical sensor circuit – Replaced optical sensor – Replaced PCM or ECM
Note: The information on the P0370 error code is purely informative, if you need more useful information, please consult your technician.

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