Question about Hyundai Sonata
The code means a Engine Coolant Temperature Sensor Circuit Malfunction. Some of the possible causes.
ECT sensor signal circuit is open or shorted ground
ECT sensor ground circuit is open between sensor and PCM
ECT sensor signal circuit is shorted to VREF or system power
ECT sensor is damaged or has failed
PCM has failed
Testing will need to be done to find out the cause.
Posted on Jan 31, 2009
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