DTC P0117: ECT Sensor Circuit Low Voltage Turn the ignition switch ON (II). 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 step 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. Disconnect the ECT sensor 2P connector. 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 step 5. NO - Replace the ECT sensor. Turn the ignition switch OFF. Disconnect ECM/PCM connector B (24P).

Check for continuity between the ECT sensor 2P connector terminal No. 2 and body ground. ECT SENSOR 2P CONNECTOR Wire side of female terminals Is there continuity? YES - Repair short in the wire between the ECM/PCM (B8) and the ECT sensor. NO - Substitute a known-good ECM/PCM and recheck (see page 11-6). If symptom/indication goes away, replace the original ECM/PCM.