Volvo AWD 850 Forum

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CODE 433 ON A2 SOCKET 850 1994

posted by  RUIAMARO on  Wed Jun 23 01:11 CST 2004
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last visit: Wed Sep 3 13:35 CST 2014
[RELATED]

CODE 433 APEARED ON A2 SOCKET. READ THAT IT RELATES REAR KNOCK SENSOR ABSENT. MY CAR BEING AN EUROPEAN MODEL DOESN´T HAVE A REAR KNOCK SENSOR. CAN ANY OF YOU BRING SOME LIGHT MY TOUGHTS (MAYBE I AM CONFUSING OXIGEN SENSORS IN THE EXAUST SYSTEM WITH NOX SENSORS ON THE ENGINE BLOCK).
ALSO GOT CODES 143 & 231, I THINK HAVE SOMETHING TO DO WITH SOM VACUUM LEAK I´VE NOT DETECTED YET.

APRECIATE SOME HELP








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CODE 433 ON A2 SOCKET 850 1994

posted by  KlausC on  Wed Jun 23 10:47 CST 2004
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ALL volvo 850's have knock sensors, Euros included. Your 231 is caused by the sensors (433 and 143) hearing some noise or they have failed. I don't know your milage, but suggest you change both sensors before you ruin something by running too rich. Besides, you probably on get 10 mpg right about now.

Klaus

--
95 854T, 88 780, 88 245








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CODE 433 ON A2 SOCKET 850 1994

posted by  someone claiming to be coot on  Wed Jun 23 10:31 CST 2004 [RELATED]

What engine?
The two knock sensors are located on the front facing side of the cylinder block under the inlet manifold according to my Haynes manual, so you may have them.
Code 143 is the front knock sensor signal absent or faulty.
Maybe there is a bad connector somewhere?

231 is long term fuel mixture too rich in part-load stage for the fenix 5.2, or too weak/too rich for Motronic 4.3







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