DTC Troubleshooting: P0117 (6-1)

DTC P0117 (6-1):  ECT Sensor Circuit Low Voltage

1.Turn the ignition switch ON (II).

2.Check the ECT with the scan tool.

Is 150°C (302°F) or higher (or H-Limit in Honda mode of PGM Tester) or 0 V indicated?


YES - Go to 3.


NO - Intermittent failure, system is OK at this time. Check for poor connections or loose wires at the  ECT sensor and at the  ECM/ PCM.n


3.Disconnect the ECT sensor 2P connector.

4.Check the ECT with the scan tool.

Is 150°C (302°F) or higher (or H-Limit in Honda mode of PGM Tester) or 0 V indicated?


YES - Go to 5.


NO - Replace the  ECT sensor.n


5.Turn the ignition switch OFF.

6.Disconnect the negative cable from the battery.

7.Disconnect ECM/PCM connector B (24P).

8.Check for continuity between ECT sensor 2P connector terminal No. 1 and body ground.

 

Is there continuity?


YES - Repair short in the wire between the  ECM/ PCM (B8) and the  ECT sensor.n


NO - Substitute a known-good ECM/PCM and recheck. If the symptom/indication goes away, replace the original  ECM/ PCM.n