Question about 2003 Hyundai Accent

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Check engine light problem

Check engine light turns on and off frecuently, I got a code for the coolant sensor but it's new. Does somebody have an answer?

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  • mshamidee Oct 20, 2008

    I have a 2003 Hyundai Accent GT. 33,000 miles. Just paid the damn thing off. Up until now. I haven't hada single problem except replacing tires. It starting hesitating. After about a week of that the engine light came on and stayed on. I had my son replace the spark plugs, check fluid levels, replaced the air filter and he checked other things as well and all seemed to be ok. I know it needs belts. They squeak and still runs rough. It taps but always has. Hyundai said that was natural (?). Had a similar problem with my 99 accent but eventually the light went out on its on. I'm afraid now I'm going to go from my reliable little car to the car from hell.

    Diane Hamilton



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Have you checked the level of the coolant and the oil. genrally an intermittant light means a level problem.

Posted on Aug 31, 2008


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I had this problem with a 2007 Chevy Cobalt. I changed the coolant sensor and even though the check engine light went out I still had a reading of "---" on the coolant gauge. The problem is most likely one of three things: a low coolant level, a bad coolant sensor, or the thermostat needs to be replaced. The only other possible thing it could be is a bad BCM (Body Control Module) which in that case you would most likely be having other weird problems.

The Thermostat and the sensor are both very easy to get to and replace. Take off the engine cover by removing the oil cap and they are both to the rear of the engine on the driver's side. They are right next to each other.

Hope this helps!

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CODE 15 - Engine Coolant Temperature (ECT) Sensor Circuit (Low Temp.)
It's no surprise that your mileage was affected, damage to the ECT sensor will affect proper operation of the fuel injection system.


  1. Relieve engine coolant system pressure.
  2. Turn ignition to "OFF".
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  4. Carefully back out ECT sensor.

  1. Coat threads (only) with sealer.
  2. Install sensor in engine, torque to 30 N-m (22 lb.ft.).
  3. Connect electrical connector.
  4. Refill lost coolant.

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This problem is frecuently in this models, check the levels and reset your ECU.

If the problem stay there, just change your coolant sensor.

Good luck, and remember rated this help.

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