trouble codes 96 jeep 4.0 litre


Old 11-10-02, 08:10 PM
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Question trouble codes 96 jeep 4.0 litre

This weekend I replaced a leaking water pump on my 1996 jeep cherokee 4 litre I6. Now the check engine light comes on. I checked the codes by turning the ignition on and off a few times. Says code 12, 22, 42. 12 says voltage to PCM disconnected (I have no idea how this happend, what it means, or how to fix it). Code 22 has to do with the coolant temperature sensor (probably because i disconnected it when changing the water pump). Code 42, automatic shutdown relay or contriol circuit (the haynes manual says with this code the vehicle has to be professionally serviced). What gives? I'm sure this all has to do with changing the water pump and disconnecting the temp sensor. Will clearing the codes work? Should I bring it to the shop like the haynes maual says? My guess is that the repair shop will clear the codes and charge me a few hundred dollars. How do I clear the codes? The haynes manual says to never attempt to clear the codes by disconnecting the battery.

Any suggestions would be appreciated.

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Old 11-11-02, 03:49 AM
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Any Autozone will run a code check and can clear the codes for you. They do not charge for this service.

Do that and see what happens.
Old 11-12-02, 09:18 PM
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Thanks. Autozone cleared the problems. It is strange that the 3 different codes came up, but again probably just from disconnection the coolant sensor.

Saved me money having autozone clear the code as opposed to a repair shop...they've got my future business.

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