How to Reset a HHR Engine Light

by Jody L. Campbell
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on board diagnosis connector image by Albert Lozano from

You should reset the engine light on an Chevy HHR only after the reason why the engine light came on in the first place has been diagnosed and, if necessary, repaired. Otherwise, damage can occur to other components depending on what the code from the trouble light indicates. If the HHR engine light is on because of emissions, resetting the light to fool the emissions computers will not work. In addition, if repairs were needed and performed correctly, the computer will detect this after the monitors have reset to ready mode and the light will go out on its own.

Step 1

Open the HHR driver's door and look under the dashboard near the steering column, using a flashlight to help make the data link connector visible. On the HHR, it's uncovered and black; you'll see it just to the left of the steering column.

Step 2

Take the female plug of the pocket scanner and place it onto the male connector (you can plug the connector in only one way).

Step 3

Sit in the driver's seat and place the scanner in one hand or on your lap.

Step 4

Turn the ignition key to the "Acc" position (two clicks forward--also known as the key-on/engine-off or "II" position). The HHR's battery will empower the pocket scanner. Some more expensive models may feature an on/off button, so refer to the manual before using the scanner.

Step 5

Press the erase button on the face of the pocket scanner and wait for the digital screen display of the scanner to indicate that the command has been sent, or for the original menu display to return to the screen. Some models may not feature an erase button but will offer toggling between menu options with scroll buttons. Some models may prompt you to confirm whether you want to erase the code(s). Again, refer to the manual for operation instructions of your particular scanner.

Step 6

Start the engine of the HHR to ensure the engine light is no longer displayed on the instrument panel.

Step 7

Turn the ignition of the HHR off if the light is out, and unplug the scanner. If the light did not go out, repeat the process. If the light remains on, chances are the code is a "hard" code. This means that something major could be wrong with the HHR and should be serviced as soon as possible.

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