DTC P0116 [MZI-3.7]

id0102d2803900

DTC P0116

CHT sensor circuit range/performance
DETECTION CONDITION
•  Indicates the engine coolant temperature logic test has failed. This DTC indicates that the CHT value is higher than the calibrated value and could prevent 1 or more OBD monitors from completing.
The PCM runs this logic after an engine off and a calibrated soak period (typically 6 hours).
This soak period allows the IAT and the CHT to stabilize and not differ by more than a calibrated value. DTC P0116 is set when all of the following conditions are met:
―  The CHT at engine start exceeds the IAT at engine start by more than a calibrated value, typically 17 °C {30 °F}.
―  The CHT exceeds a calibrated value, typically 107 °C {225 °F}.
―  The fuel system, heated oxygen and misfire monitors have not completed.
―  The calibrated time to set DTC P0116 has expired.
POSSIBLE CAUSE
•  CHT sensor malfunction
•  Cooling system malfunction
•  PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
•  Has FREEZE FRAME DATA been recorded?
Yes
Go to the next step.
No
Record FREEZE FRAME DATA on the repair order, then go to the next step.
2
VERIFY RELATED SERVICE INFORMATION AVAILABILITY
•  Verify related Service Information availability.
•  Is any related Service Information available?
Yes
Perform repair or diagnosis according to the available Service Information.
•  If the vehicle is not repaired, go to the next step.
No
Go to the next step.
3
VERIFY RELATED PENDING CODE OR STORED DTC
•  Verify the related PENDING CODE or stored DTCs.
•  Are other DTCs present?
Yes
Go to appropriate DTC inspection.
(See DTC TABLE [MZI-3.7].)
No
Go to the next step.
4
INSPECT CHT SENSOR
•  Inspect the CHT sensor.
•  Are there any malfunction?
Yes
Replace the CHT sensor, then go to the next step.
No
Go to the next step.
5
VERIFY TROUBLESHOOTING OF DTC P0116 HAS BEEN COMPLETED
•  Make sure to reconnect all disconnected connectors.
•  Clear DTC from memory using the M-MDS.
•  Start the engine.
•  Perform the “KOEO/KOER self-test” (See KOEO/KOER SELF TEST [MZI-3.7].)
•  Is same DTC present?
Yes
Replace the PCM, then go to next step.
(See PCM REMOVAL/INSTALLATION [MZI-3.7].)
No
Go to the next step.
6
VERIFY AFTER REPAIR PROCEDURE
•  Perform the “AFTER REPAIR PROCEDURE”.
•   Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [MZI-3.7].)
No
Troubleshooting completed.