Question about 2008 Mitsubishi Lancer Evolution

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Check engine light on

On a 2008 Mitsubishi Evolution, I am getting the TPS light and also a check engine soon light coming on. I don't have the tire pressure monitors on the car. I put air in the tires and the check engine light went off for 1/2 day and then came back on. Tire pressures are fine, but on sensors on the wheels. Do you think I have 2 issues here or just the TPS?? FYI - just bought the car. It has a custom ECU Map and exhaust.

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The TPMS warning will come on as long as you do not have the tire pressure sensor installed and working. There is no way around it as it is now a Federal safety device.

You need to have the check engine light code pulled to know where to go with it. The fact that you have custom map and exhaust may be an issue, depending on how it was done. No way of knowing without knowing the code though.

Posted on Sep 10, 2009

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Who did the reflash and custom map? Ave them pull the codes and get to the bottom of what is causing the SES light. Many time the ECU just lights up all the lights. If the code is from the airflow maps not being correctly adjusted with the extra power you have, then one of the problems that the ECU thinks it has is a TPS fault.

The ECU is programmed to look for matching boost, airflow and throttle position and compare it with torque. If everything does not match up, then it throws the lights and a code. But getting a custom remap, you went and messed with all that.

Go back and have a talk with yout tuner. He should be able to fix it up. If you bought the car with the tune, find an experienced EVO tuner in your area. East Coast would be Ivey Tune, AMS, Turbotrix, or TTP down in Fla. West coast would be GST in the bay area or Road Race Engineering in LA.

Mike W

Posted on Sep 07, 2009


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