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LH 2.4 error code 123: I can't get rid of it 200 1993

uid 18083's pic
posted by  lucid on  Mon Jul 21 07:46 CST 2008
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last visit: Fri Oct 24 12:31 CST 2014
[RELATED]

Hi Jessie,

Here's a bump up anyhow. FWIW, this is what the Regina (essentially the same as LH2.4) has to say about the 123 code (paraphrased):

"If the ECT signal indicates below –40C or above 120C the fault code [and CEL] is set.

The ECU then assumes 20C at startup and approx. 90C at all other times (limp home) so the car can still be driven."

The ground path is thru the sensor threads & body, so there shouldn't be any tape or teflon goo on the threads, just a crush washer for sealing. The Bentley shows the common ground for both ECUs to be the one on the left (fwd) fuel rail bracket.

P.S. Just curious, are you getting any EZK codes in 6? It can also set the 123, but doesn't add the CEL, and just defaults to an assumed 90C all the time. A ground side fault in the sensor could affect both CU signals it seems like.






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