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Autodata - Diagnostic Trouble Codes Fault locations and probable causes - 2004 edition

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Flash type<br />

<strong>Fault</strong> tocation<br />

Probable cause<br />

637 Transmission fluid temperature (TFT) switch - circuit malfunction Wiring, TFT switch, ECM<br />

638 Transmission fluid temperature (TFT) switch - circuit malfunction Wiring, TFT switch, ECM<br />

639 Turbine shaft speed (TSS) sensor - signal low<br />

Wiring, TSS sensor<br />

645 1st gear failure - incorrect ratio<br />

Wiring, transmission fault<br />

646 I 2nd aear failure - incorrect ratio I Wirina. transmission fault<br />

647 I 3rd gear failure - incorrect ratio I Wiring, transmission fault<br />

648 4th gear failure - incorrect ratio<br />

Wiring, transmission fault<br />

649 Electronic throttle valve - failure<br />

Wiring, electronic throttle valve, ECM<br />

651 Electronic throttle valve - intermittent failure<br />

Wiring, electronic throttle valve. ECM<br />

998 ECT sensorllAT sensorlMAF sensor/TP sensor - circuit Wiring, ECT sensorllAT sensorlMAF<br />

malfunction<br />

I sensorlTP sensor, ECM

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