Check Engine light on
01-09-2008, 03:09 PM
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Check Engine light on
Very good day Ls & Gs. I have a grand cherokee laredo 2000. The check engine light is just on and the code is High speed sensor circuit. The problem is that all three mechanics I have contacted have not been able to solve the problem. They have not been able to trace the circuit. Please who can help me out. My car does not REV well at low speed. 
02-22-2008, 04:35 PM
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Year: 2003
Model: Grand Cherokee
Engine: 4.0L, 63mm TB, FIPK, Gibson Exhaust
there are two speed sensors on the transmission one for input speed and one for ouptut speed, these fail and usually cause the problem you describe. You are basically locked into 2nd gear to prevent damage. I would go into the dealer ship and get tehse two sensors and replace them. If you are going to work on your dub then you really need to get a factory service manual, they can be had for $50 on ebay as a PDF file.
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