1999 saab 9-8 engine code P 0442 what do I look

code p 1652 refers to engine control relay --open circuit/short circuit to ground ===causes --wiring open circuit/ short circuit to ground---connectors ---engine control relay---ECM

You need to change the oil every year or 10.000 miles. The oil will be polluted with foreign material like water, sulpur etc.

It may be the problem but the first thing i would do is take it to a auto parts store and have them scan the codes, if its a misfire codes then the most common problem is the direct ignition unit but i would also take a look at the sparkplugs, make sure they are good first. good day.

Code P0502 check that your cruise control is working correctly.

You will need to have your car's ECM (Computer) read by a OBD II scanner to determine what Trouble Code your ECM is giving so a mechanic can properly diagnose the problem. You can go to your local AutoZone store and they can pull the codes out of your ECM for no charge.

u can... it aint hurtting nothing exept you may be getting a little bit less gas millage...hope this helps

P0442 Evaporative Emission Control System Leak Detected (small leak)....this actually should not cost that much...its more then likley a leak on 1 of your hoses...if u take it to the dealler the parts and stuff is more expensive...but if u take it to the mechanic shop then they are more then likley goin to tell you u need stuff that u really dnt in it probally in hte long run cost you more there....but its up 2 u...any more questions feel free to ask...hope this helps

If you will take the car to a local auto parts store they can see what the code is most do a free check engine light check.

On 1999 9-3 models there is a fuel filter located under the pass rear door. However if this was plugged it would not kick back in after a short time. Typical suspects are crankshaft position sensor which will work well on a cold engine and intermittently cut off and on when the engine is hot. Its a cheap sensor, and very easy to change. Possibly check condition of spark plugs and the DI cassette as well. Also check function of Fuel pressure regulator. Any fault codes stored (CEL on?)
Justin Duthie
Strictly Saab
Melbourne, FL