how to pull codes

[1995Q45havoc]

I have 1995 Q an my engine light came on for the first time,but only comes on occasionally when driving. My question is how can i get codes from my car what equipment do i need so i dont have to pay infiniti $125 everytime to pull a code .........please your input is well appreciated

[maxnix]

There is a PITA procedure in the FSM for pulling codes from the ECU.

There are a couple of threads concerning laptops and compatible cables to read ECU output.

[RustyBucket]

If you don't have the Consult interface, you have to actually remove the ECU so you can get at the side of the ECU that has the LEDs and the switch. As Maxnix said, it's a PITA.

If it comes on occasionally, I'd recommend checking your MAF sensor connector. Wiggle it while the engine is idling and if the idle changes, the pins likely need to be cleaned and the connector itself might need to be tigtened up to make good electrical contact. I had a similar problem on my '94 and doing that cleared it up.

Have a look in the tech help section on q45.org, there helpful articles on there about the MAF thing.

[goody90q45]

There is a PITA procedure in the FSM for pulling codes from the ECU.....

The FSM is a pretty large book so let me narrow it down for you. See page EC-50 for the procedure for pulling codes from the ECU. I posted the 94Q FSM and it will be the same for your 95Q.

http://www.nicoclub.com/FSM/Q45/1994_Q45/ec.pdf

CEL only comes on occasionally? Maybe after 20 minutes of driving? I put my $$ on EGR codes. Let us know.