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P0638 Diagnostic Trouble Code Discussion for June 2013

Throttle Actuator Control Range/Performance


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Trouble Ticket Help Requests for DTC P0638
Help Request Posted
2008 Mazda 3 S 2.3L Idle fault VIN: JM1BK34428
P0638: Throttle control range/performance fault. ... response and MIL light on with P0638 and P2112. When put into gear engine will shake badly with #2 & 3 coils not firing. During testing I found the PCM not grounding the drive by wire relay(ETV). Tested the wiring from PCM to relay and is ok. Tested po...
June 21, 2013
2008 Mazda 3 S 2.3L Idle fault VIN: JM1BK34428
P0638: Throttle control range/performance fault. ... response and MIL light on with P0638 and P2112. When put into gear engine will shake badly with #2 & 3 coils not firing. During testing I found the PCM not grounding the drive by wire relay(ETV). Tested the wiring from PCM to relay and is ok. Tested po...
June 21, 2013