1997 Mitsubishi Eclipse 2.0 No Turbo - Check Engine Light - Mitsubishi Forum

cjernigan · #1 11-05-2009, 04:28 PM

I am trying to get my son's check engine light to go off so I can get the car inspected. As soon as you start the car the Check engine light comes on and stays on. He took it to get it inspected and the guy gave him a print out of the codes it had stored in it. The car runs fine but has 144,000 miles on it. My question is what do you think is wrong or the 1st place to look for a problem. I realize that several codes can be issued that have nothing to do with the actual problem. Here are the codes:

P0134 – O2 Sensor Circuit No Activity Detected (Bank1, Sensor 1)
P1698 – No CCD messages from TCM (A/T)
P0300 – Random/multiple cylinder misfire detected.
P1899 – Park/Neutral position Switch Failure.
P1487 – High speed radiator fan control relay.

Where do I start hoping somebody else has had this same problem?

Thanks

Chris

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TheEngineer · #2 11-05-2009, 06:07 PM

Well the misfire and o2 sensor circuit could be attributed to the front o2 sensor being bad. The TCM and switch failure may have a bad sensor, but do you notice any shifting problems or if the lights on the dash showing what gear you are in are working? The fan relay couple just be a bad relay. Seems strange that you are getting 3 things wrong all at once. But its possible that they have just been adding more problems while the light has been one. So i would start by

1. Replace the o2 sensor. Then disconnect battery for an hour or so and try and see if the light comes back. if it does go to autozone or a parts store and they can scan it for you and see if you got rid of any of these.
2. Then try the relay since it will be the next easiest.

cjernigan · #3 11-06-2009, 10:11 AM

The car is a manual 5 speed so there is no indicator on the dash. It shifts just fine. We had a new clutch put in it about 4 months ago. Excuse my ignorance but what does TCM stand for? Also do you know where the Front O2 Sensor is located on this car and is it difficult to get to?

TheEngineer · #4 11-06-2009, 07:14 PM

The front o2 should be on the downpipe prior to the catalytic converter just after the manifold. It shouldnt be to difficult. And the TCM is Transmission Control Module. But that is only for automatic cars so why you are getting that code is confusing to me. So something is wrong there. Maybe the guy read the codes wrong or something. But i would start with like i said with the 02 sensor and see if that gets rid of your problem. You may need to drive the car a bit to clear the codes once its been replaced so that the ECU rechecks to see that the problem is gone