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-   -   Codes 21 and 91 (http://forums.mustangworks.com/showthread.php?t=29954)

ziggy_2k 10-10-2002 05:51 PM
Codes 21 and 91
 
I pulled the codes from my stang I got 91 and 21. What are they and what should I do? I just dupmed all my money into a new clutch so I'm by no means rich. Please help.

PKRWUD 10-12-2002 10:17 AM
Was the engine warmed up before you pulled the codes?

ziggy_2k 10-14-2002 12:42 AM
The check engine light doesn't even come till the car has been warmed up for a very long time. thanks for you help.

PKRWUD 10-14-2002 06:23 AM
You didn't answer my question. When you read the codes, was the engine warmed up, or was it cold?

ziggy_2k 10-15-2002 01:40 AM
Sorry. Yes the engine was warm

PKRWUD 10-15-2002 07:57 AM
Then you need to replace your ECT (Engine Coolant Temp) sensor, reset the ECM, and run for codes again. Odds are that a new ECT will solve your problems.

Take care,
~Chris

ziggy_2k 10-15-2002 08:17 PM
OK SO what is that? how much is it? How hard is it to replace? thanks


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