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Diagnostic Trouble Code: B0418
Diagnostic Trouble Code Name: Passengers Air Mix Door Motor Circuit
Vehicle Make: Pontiac
Vehicle Model: G8 (VE)
Diagnostic Code Entered By: ZerOne
Diagnostic Code Entered On: Wed Oct 06, 2010 11:00 pm
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Please Note: The DTC Information provided has been randomly generated.
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Diagnostic Trouble Code Description:
Crankshaft Position Sensor Circuit
Possible Sensor Faults
ECM
Possible Related Diagnostic Trouble Codes
DTC P0335, P0336, or P0338
Circuit / System Description
The crankshaft position (CKP) sensor is located on the rear of bank?1 of the engine block. The CKP sensor is a hall effect switch that works in conjunction with a 58X?reluctor wheel that is attached to the crankshaft. Each tooth on the reluctor wheel is spaced 6?degrees apart with one span having a 12?degree space. The engine control module (ECM) uses the 12?degree space to determine top dead center (TDC) for cylinders?1 and 4. The ECM determines when cylinder?1 is on the compression stroke by monitoring the CKP sensor and the camshaft position (CMP) sensors. The ECM can synchronize the ignition timing, fuel injector timing, and spark knock control based on the CKP sensor and the CMP sensor inputs.
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