Need help, Infinity Q30 1996 engine coolant problem

[pls08]

First I wan't to say hi to everyone as that's my first post here:]

My problem is that some time ago car started to shut off suddenly during driving or during random stoping on the intersections.Some times it did not want to start after driving it to the store. The codes it gaves me are:

P0115 engine coolant temperature circuitP0325 knock sensor 1 circuit (bank1)P0125 insufficient coolant temp. for closed loop fuel control

I don't have service manual for it and I can't find any. It would probbably narrow my search for a sollution.Any help would be really appreciated. Thanks.
Modified by pls08 at 7:40 AM 11/9/2008

[goody90q45]

I'm not familiar with the 96 Q30 model but there is a 96 J30 and a 96 I30. In either case here's a link to your Factory Service Manual (FSM). You'll find the self-diagnostics for the trouble codes in the EC section of the manual.

http://www.nicoclub.com/FSM/

Since both codes relate to the engine coolant temperature sensor and the CEL comes on for insufficient temperature or bad signal, I'd be replacing the thermostat (they fail open and don't allow the engine to heat up properly) and checking the resistance of the sensor by placing the tip in a pot of boiling water. Did the connector get unplugged, have loose pins or show signs of corrosion? You might check that too. It's all explained in the FSM. Ignore the knock sensor code for now as the other two codes probably set it off.

If you have a J30 check out fuzzycats.com. It's an excellent DIY repair website for the J30 that may already address this problem.

Welcome to NICO and good luck with the troubleshooting.

[pls08]

Thanks alot, It seems like it's I30 because I found a picture on the internet of I30 and it looks the same.It has Q30 on the trunk so it's wierd.

Based on your advice and FSM I basically know what to do.Thanks again.

[maxnix]

The script I does appear to be a Q unless studied.

[goody90q45]

You're right. The italic I on the trunk does look a bit like a Q. I wonder how long the OP has owned his Q30?