Question about Saab 900

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'Check Engine' light stays on but car seems to work fine. Can you tell what the problem is?

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  • 48 Answers

The check engine is often used to direct traffic to the dealer to get him to turn it off while he sells you all new belts and hoses and any other goodies to pad his bottom line. In a perfect world they all would have been sued in a massive class action suit and we all would be riding around in free cars...

Its a gimick in other words. Live with it or pay for it to be turned off.

Posted on Sep 06, 2009

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: reset check and service engine lights

It's in the console under the coin holder, in front of the gear shifter. You have to remove the coin holder and you will see it.

Posted on May 18, 2009

mkv0525
  • 358 Answers

SOURCE: trac off and check engine light for lexus es 300

If the light comes back on you to retrieve engine codes and see if the car has a misfire on one of the cly.

Posted on May 28, 2009

SOURCE: 2006 Tuscon Check Engine light just came on, car running fine

dear friend-filling the tank has nothing to do with the engine light.in order to cancel this light,disconnect the battery and leave for a while.reconnect battery and check light,it should be of,if the same happen again take vehicle to a dealership for a diagnostic report.

Posted on Jul 29, 2009

techbuster
  • 5081 Answers

SOURCE: Check engine light stays on.

There are three ways to reset a check engine light.

1. Disconnect the battery, wait approximately 30 minutes, reconnect the battery. This resets the cars computer which also reset the check engine light. On newer OBD (on-board diagnostic) compliant vehicles this usually does not work. See step 2.

2. Reset using an OBD II reader. When you hook an OBD II code reader up to your vehicle, you can reset the computer using the code reader.


3. Fixing the problem. Generally the check engine light comes on for a reason. Usually it is emission related (sensors, gas cap) or electrical (faulty wiring). In this case the way to reset the check engine light is to fix the problem

Posted on Sep 24, 2010

ginko
  • 19396 Answers

SOURCE: 2001 Isuzu Rodeo 54248 miles

Hi.

If problem is only on startup and when idleing, then the problem is likely IAC system, also a vacuum leak will cause the same problem.

If problem is not only on startup and idle, but also when driving, then MAP sensor and EGR system must be checked.

Check also accelerator cable state and setting.


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The first thing to do is pulling out the OBDII fault codes stored in the ECM. This is done connecting a code reader to the ECM diagnostic port. The job can be done for a small fee at any local garage, and it is done for free at AutoZone.

The codes will help locating the problem.

About possible faults:

Problem is stalling when idling and during startup, but engine idling fast all the time. Problem not starting at times it is due to the fact that the wrong mixture is being sprayed, this is probably causing flooding and misfire. Since the CEL is on, one of the codes returned is probably misfire.

Check accelerator.

Check IAC system. This is composed by a valve and a solenoid that check and control amount of extra air air when the engine is idling. The IAC valve is located on top of the throttle body.

Check the vacuum system and try cranking with gas tank cap off. Vacuum system is tested using an hand tool gauge onvacuum lines while spraying card cleaner on the hoses (or heating them with a torch). If there is a leak, pressure will go up. A big leak will also do hissing noise, and will often result in a lean code when doing an OBD code scanning.

This kind of symptoms can also be caused by weak wiring to MAP/MAF sensor (MAP in this engine).

If the car also drives very rough and is revving up and down in a weird way, check the EGR valve.

As first thing I would do a code scanning. This car is OBDII. The scan can be done for free at the nearest Autozone, or for a small fee at any garage.

If you get any OBDII code from the scan, report it here, so that we can individuate the possible reason for the problem.

If you repute my solution helpful, then please take some times to accept the solution. Providing good repair tips requires time and skills, and your feedback is important for us.

Regards.

Ginko.

Posted on Oct 26, 2010

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