Code 22 A headscratcher.

[Count Knobula]

So I'm getting code 22. Water temp sensor (according to alldata) apparently. The car has a cold start problem. CSI, despite the fact it works(tested), does not get the signal to work when it should.

The water temp sensor seems to work. It was changed (as the prev. one was kaput).

Help.

Please.

Anyone know any supra mechanics in the Atlanta area?

 

[loki2043]

sounds like wiring problem. check for brittle wires

 

[Nick M]

Well, obviously the circuit is not ok. 22 indicates that the ECU is not recieving the signal in the correct range, likely open or short.

The car needs to run richer when the engine is cold. That allows for easier ignition of the flame front when cold. Hence, your cold start problem. When the ECU gets the signal that it is cold, the injector on time(known as pulse width) increases, and the extra injector in the manifold operates.

You need a refrence voltage, good sensor, ground, and signal to the ECU for the circuit to operate correctly.

 

[Count Knobula]

Gonna be doing some checks on the circuit tonight but first must check the transmission. Yesterday it just err stopped working. Got up to 20mph then all the power was there but not getting to the wheels.

Then on the trip home the car was fine. Gonna put it up on a lift and check just to make sure though.

Is it worth getting a replacement knock sensor (roughly 50 bucks) for my dead one?

 

[Nick M]

What do you think? Manufactures don't put things on cars because it might help, but because it is needed. Sometimes it is redundant, but but improves the car.

Put the new knock sensor in.