DTC P0116 [MZ-CD 1.6 (Y6) (EURO4 emission level)]
id0102g6803900
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DTC P0116 |
Engine coolant temperature (ECT) sensor range/performance problem |
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DETECTION CONDITION
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• The PCM monitors the ECT sensor. The PCM measures the engine coolant temperature at specified time intervals after the engine is started. If a rise in temperature above a specified temperature is not detected during an interval, the PCM determines that the ECT sensor circuit has a malfunction.
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POSSIBLE CAUSE
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• ECT sensor connector or terminal malfunction
• ECT sensor malfunction
• Thermostat malfunction
• PCM malfunction
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Diagnostic procedure
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STEP |
INSPECTION |
ACTION |
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1
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VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
• Has the FREEZE FRAME DATA been recorded?
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Yes
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Go to the next step.
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No
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Record the FREEZE FRAME DATA on the repair order, then go to the next step.
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2
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VERIFY RELATED REPAIR INFORMATION AVAILABILITY
• Verify related service repair information availability.
• Is any related repair information available?
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Yes
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Perform repair or diagnosis according to the available repair information.
• If the vehicle is not repaired, go to the next step.
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No
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Go to the next step.
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3
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VERIFY RELATED PENDING CODE AND/OR DTC
• Switch the ignition to ON (engine off).
• Perform the Pending Trouble Code Access Procedure and DTC Reading Procedure.
• Is the other PENDING CODE/DTC also present?
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Yes
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Go to the applicable DTC inspection.
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No
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Go to the next step.
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4
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INSPECT ECT SENSOR CONNECTOR CONNECTION
• Switch the ignition to OFF.
• Disconnect the ECT sensor connector.
• Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
• Is there any malfunction?
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Yes
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Repair or replace the terminal, then go to Step 7.
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No
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Go to the next step.
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5
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INSPECT ECT SENSOR
• Inspect the ECT sensor.
• Is there any malfunction?
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Yes
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Replace the ECT sensor, then go to Step 7.
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No
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Go to the next step.
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6
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INSPECT THERMOSTAT
• Inspect the thermostat.
• Is there any malfunction?
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Yes
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Replace the thermostat, then go to the next step.
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No
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Go to the next step.
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7
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VERIFY THAT DTC P0116 TROUBLESHOOTING IS COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear the DTC from the PCM memory using the M-MDS.
• Run the vehicle under the FREEZE FRAME DATA stored condition.
• Is the same DTC present?
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Yes
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Repeat the inspection from Step 1.
• If the malfunction recurs, replace the PCM.
Go to the next step.
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No
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Go to the next step.
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8
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VERIFY AFTER REPAIR PROCEDURE
• Perform the after repair procedure.
• Are any DTCs present?
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Yes
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Go to the applicable DTC inspection.
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No
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DTC troubleshooting completed.
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