Codes 12 and 18

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09-21-04, 09:51 AM

Chuck

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Codes 12 and 18

My '91 N/A is throwing codes 12 and 18....throttle position sensor. Of course, I'm getting bad pulsing idle. My question is: Does this mean that the TPS is shot and needs replacing, or does it mean that the TPS just needs adjustment?

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09-21-04, 10:12 AM

assman20a

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did you try checking resistance or ohms on the TPS

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09-21-04, 01:45 PM

Crionics

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Quote:

Originally Posted by Chuck

Does this mean that the TPS is shot and needs replacing...

Not necessarily. Could be a short in the wire, bad connect at ECU or sensor...Grab an ohmmeter and check the sensor to see if it's bad. i dont know the S5 check procedure, but a search should come up with it.