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P000A ‘A’ Camshaft Position Slow Response Bank 1

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Car diagnostic fault code P000A ‘A’ Camshaft Position Slow Response Bank 1. The powertrain control module (PCM) monitors and evaluates the response of the actual position on a target position change.

The setpoint and camshaft position is saved at the beginning of a setpoint change. If this changed over time is large enough, the camshaft phasing change is evaluated. If the change after the diagnostic time is smaller than a threshold, a slow response is detected, and if the value is greater, then there is no concern. By detecting a concern, an antibounce counter is incremented otherwise the counter is decremented. If the counter exceeds an adjustable limit, the P000A is set.

Car Trouble Symptoms

(1) Check engine warning light is on.

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Possible Cause of P000A OBD II Code

(1) Radiofrequency interference
(2) Camshaft advance mechanism binding (VCT unit)
(3) Erratic camshaft position due to low oil pressure
(4) Oil flow restriction in the oil passages or the variable camshaft timing (VCT) valve body
(5) Damaged VCT phaser

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