C0638 DTC For Chevrolet Hhr

Chevrolet Hhr Engine Specifications:
Engine Type :Single Cylinder Engine
Cylinder Type :Opposite Piston Engine
Engine Air Intake Process :Supercharged Engine

Your Chevrolet Hhr engine control system detects a problem, the computer stores the diagnostic trouble code C0638 in its memory. To figure out what is wrong with your vehicle you must first extract the C0638 DTC For Chevrolet Hhr.

On 1999 and later C0638 Chevrolet Hhr engines, the instrument cluster has a built-in self-diagnostic mode that can be accessed by pressing and holding the instrument cluster SELECT/RESET button. Insert the ignition key and turn to the RUN position (but don't crank or start engine). Continue to press and hold the SELECT/RESET button (for 5 seconds) until the word TEST is displayed by the odometer. Release the SELECT/RESET button within three seconds after the word TEST is displayed to begin the self-diagnostic mode.

C0638 Chevrolet Hhr DTC Meaning

C Chassis Code - Problem is controller area network wiring bus and modules.
0 SAE - Generic
6 Vehicle Speed Control And Idle Control System
3 Low Coolant Circuit
8 Park/Neutral Postion (PNP) Switch Circuit Engine Torque Signal Circuit

If your vehicle failed a C0638 Chevrolet Hhr test and the C0638 Check Engine Light is NOT on, chances are you have a problem with the OBDII system, a burned out MIL lamp, or a faulty catalytic converter. The converter is essentially an afterburner that cleans up the exhaust after it exits the engine. The OBDII system uses C0638 a ownstream oxygen sensor to monitor the efficiency of the converter, and it should detect a drop in converter efficiency if the converter has been contaminated or is failing (ignition misfiring, leaky exhaust valves, and oil burning can all damage the converter). What you want to look C0638 DTC For Chevrolet Hhr: Any conditions that might cause ignition misfire, an overly rich or lean fuel condition, or loss of compression.

C0637 DTC (Previous DTC Code) ( Next DTC Code ) C0639 DTC
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