Help With Codes
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Joined: Jun 2006
Posts: 219
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From: Hebron, KY
Car: 1992 RS Heritage
Engine: 305 TPI
Transmission: TCI 700r4
Help With Codes
I keep getting the MIL after the engine is warmed up and cruising at highway type speeds; 45mph-up. I finally got a chance to pull the codes: 13 & 15 which are "Oxygen Sensor signal stays lean in warm engine cruise" and "Low temp indicated at coolant temperature sensor".
I can handle these two issues myself, but mainly I was wondering if they could be related? Could a bad temp sensor interfere with the O2 signal or anything like that?
Any info is appreciated!
Dave
I can handle these two issues myself, but mainly I was wondering if they could be related? Could a bad temp sensor interfere with the O2 signal or anything like that?
Any info is appreciated!
Dave
Joined: Jul 1999
Posts: 10,950
Likes: 26
From: Orange, SoCal
Car: 1990 Pontiac Trans Am
Engine: 355 TPI siamesed runners
Transmission: Tremec T56
Axle/Gears: 12-Bolt 3.73
Re: Help With Codes
Yes, if the computer thinks the engine is too cold, it wont run the proper checks on the O2 sensor, so it will run in open loop mode.
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