Ok engine fault code 22 Knock sensor.. Only getting this when warm over 50% on temp gauge. Car runs fine before normal running temp have rest ecu still comes up with 22. Do you reckon it’s a new sensor time ?? Car really un drivable over 3500 when warm

 

either knock sensor faulty, wiring fault, bolt loose holding it in.. or engine internal damage.. suggest you get it checked..

Simon

 

yup new sensor me thinks Ill order one up on the 3rd are they the same for the classic as im a 94 import wrx .

 

some earth through the body (1 wire), some have an earth that goes to the ECU(2 wire).

I assume you can use the same for both and just use the signal wire for the earlier 1 wire sensor, as it will earth through the bolt.

Adam

 

thanks

 

yip its the one wire type stripped it all today did all 3 checks from the service manual one check was a little off rest fine. Car ran fine took it a wee run everything a1 then it got to 51 - 52 % on the temp guage up came the check light then it cough and splutter over 3500. Ill reset ecu in the morn then check the code again. oh happy new year

 

could possibly be the coolant sensor, I'd check this also

 

Yea ill check that out tomorrow guess ill just go check all of them

 

Yep.. classic sign of a failed coolant sensor is the rad fans are on when engine is not fully up to temp.

Simon

 

Would'nt say it does simon but ill check that too thanks guys

 

The fans won't come on if the water sensor fails cold, when they do fail cold the ECU thinks its -46 C (so the PFC said) so it runs really rich and the engine chokes. Could it be this?

 

yip fan is coming on temp guage about 1/4 up up no heat in the radiator. Too cold n dark now will attack again tomorrow.