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Diagnostic Trouble Code: B0238
Diagnostic Trouble Code Name: Defogger Door Motor Circuit
Vehicle Make: Chevrolet
Vehicle Model: Lumina (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:
Misfire Detected - Rough Road Data Not Available
Possible Sensor Faults
ECM
Possible Related Diagnostic Trouble Codes
DTC P1380 for the 2.8L, 3.0L, 3.2L, or 3.6L engine
Circuit / System Description
Correct engine misfire detection is dependent on whether or not the vehicle is experiencing a rough road condition. A rough road condition causes unexpected crankshaft fluctuations. In order to detect a rough road condition, the electronic brake control module (EBCM) communicates a wheel speed signal over the serial data circuit to the engine control module (ECM). The wheel speed sensor information allows the ECM to distinguish if the crankshaft speed variations are caused by a rough road condition or are caused by a true misfire.
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