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1996 Saturn SL2 service engine light

Tiny
CHOPPERKINGPIN
  • MEMBER
  • 1996 SATURN SL2
  • 4 CYL
  • FWD
  • MANUAL
  • 172,000 MILES
Car started running rough when first started. Had local auto parts store run codes. The o2 sensor came up. Replaced both sensors and pcv valve. Service engine light comes on. Went and had store run codes twice again and no codes come up. Service engine light still comes on?
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Monday, December 28th, 2009 AT 11:34 PM

2 Replies

Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
HI there, Some generic code readers will not pick up all codes, you may have to get a dealer to scan this to check for any unresolved fault codes, failing this you may need to get the ECU bench tested for internal faults.

Mark (mhpautos)
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Tuesday, December 29th, 2009 AT 4:46 AM
Tiny
SERVICE WRITER
  • MECHANIC
  • 9,123 POSTS
IF the light is on, there are codes there...not sure why they aren't being shown.

Setting that aside, the Saturn 1.9 motors had there share of problems with the coolant temp sensors on them.


https://www.2carpros.com/forum/automotive_pictures/30961_saturn_CTS_3.jpg



IF you look on the right side, you can see where it cracked. The symptoms from these vary, but most often related to the cold start.

Clear the codes..erase the data in the pcm, and drive it and see if anything returns.
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Tuesday, December 29th, 2009 AT 4:51 AM

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