Hello All!

I have a 1998 S90 that has recently had the Check Engine light come on. I scanned it with an Actron (?) OBDII scanner and it showed no faults.

I reset it, and two days later it's back! (Again - no codes!)

Any sugestions?

Is this a "dealer only" diagnosis, or what?

EncoRick,

I assume the car is operating fine? No noticeable problems?

Inexpensive OBDII readers do not recognize Codes set by the TCM (Transmission Control Mondule) even though it tells the ECM to light the MIL.

I found this out on our 98 S90 when the PNP set the MIL but no codes were present when checked by a consumer OBDII reader.

You will need to take it to a good shop that has an expensive OBDII reader that is set up to read ALL the codes set.

DEWFPO
--
1998 S90 065,800 and 1995 964 149,450

I recently had the classic case of flashing W/E/arrow lights with check engine light on. Auto Zone (for free) read and cleared the code. They use an Actron hand held unit that sells for $150.00
The code was PO705 which says that I have a failing PNP switch.

I am thinking of buying laptop OBD2 software. Do you know of a product that reads the non engine or emission related codes?
--
David Hunter

David:
Take a look at these scan software packages:

http://www.auterraweb.com/index.html

http://www.obd-2.com/

Mike Brown
Greenville, NC
1986 244 137K
1996 965 100K
--
Mike Brown Greenville, NC 1996 965 94K 1986 244 137K