ASD and code 42. - JeepForum.com
 
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post #1 of 3 Old 09-17-2002, 09:36 AM Thread Starter
gcl97
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ASD and code 42.

What is the cause of the computer code of 42 on a 97 ZJ?
Any clues? Thanks.

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post #2 of 3 Old 09-17-2002, 04:33 PM
moabster
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According to my Haynes manual this is a problem with the Fuel gauge sending unit. Is your gas guage working right? The 42 Check Engine Light Flash Code is covered by three Generic Scan Tool Codes. They are:
P0462 - Fuel Level Sending Unit Volts Too Low (Open Circuit between PCM and fuel gauge sending unit.)
P0463 - Fuel Level Sending Unit Volts Too High (Circuit shorted to voltage between PCM and fuel fauge sending unit.)
P0460 - Fuel Level Unit No Change Over Miles ( No movement of fuel level sender detected.)

I think you can get the scan codes read at Auto Zone for free.

HTH

2000 Jeep Grand Cherokee V8 Stock
93 YJ I6 hard top (really belongs to SPEED)
RE 4.5" Extreme Duty Lift, Advanced Adapters SYE, Tom Woods CV Drive Shaft, EA589 10" rims with 33" x 12.5" MT/Rs
Bullet Proof Front and Rear Bumpers and Tow bar
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post #3 of 3 Old 10-05-2002, 07:44 AM Thread Starter
gcl97
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Got the Fuel Sending Unit replaced by the dealership.
Mobster -- thank you for the tip.
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