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1998 Chevy Cavalier check engine light on

Tiny
CHUCK KOLODIEJ
  • MEMBER
  • 1998 CHEVROLET CAVALIER
  • 4 CYL
  • 2WD
  • MANUAL
  • 112,000 MILES
What would cause code #P0118 and how do I fix it? I did replace coolant temp sensor. Temperature gauge stops working when engine fan comes on and code goes active.
Thursday, December 4th, 2008 AT 6:45 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,794 POSTS
Hi:
If you replaced the CTS, then I have to ask a question. Did you reciently change the coolant or have the system flushed? If so, bleed the system so there are no air blocks. If not, I feel it is related to the PCM or a wiring problem to the PCM. I suggest having it checked at a dealer. You may even want them to check the EGR. Finally, is does the car run rough when this happens?

Here i s a picture of how the system ties together. Check for wiring repairs and connection repairs.


https://www.2carpros.com/forum/automotive_pictures/249084_50791_1.jpg



Let me know if this helps. I really feel there is a bad connection causing the engine to think it's running at below 0 degree temps.

Joe
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Thursday, December 4th, 2008 AT 8:29 PM

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