DTC P0125:00 [MZR 2.0 DISI i-stop]
id0102d4702000
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DTC P0125:00 |
Insufficient coolant temperature for closed loop fuel control |
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DETECTION CONDITION
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• The PCM monitors the ECT sensor signal after the engine is started while the engine is cold. If the engine coolant temperature does not reach the expected temperature for a specified period, the PCM determines that it has taken an excessive amount of time for the engine coolant temperature to reach the temperature necessary to start closed-loop fuel control.
Diagnostic support note
• This is a continuous monitor (engine cooling system).
• The MIL illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM.
• PENDING CODE is available if the PCM detects the above malfunction condition during first drive cycle.
• FREEZE FRAME DATA (Mode 2)/Snapshot data is available.
• The DTC is stored in the PCM memory.
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POSSIBLE CAUSE
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• ECT sensor connector or terminals malfunction
• PCM connector or terminals malfunction
• ECT sensor malfunction
• Cooling system 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 (MODE 2)/SNAPSHOT DATA AND DIAGNOSTIC MONITORING TEST RESULTS HAVE BEEN RECORDED
• Have the FREEZE FRAME DATA (Mode 2)/snapshot data and DIAGNOSTIC MONITORING TEST RESULTS (engine cooling system related) 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 (Mode 2)/snapshot data and DIAGNOSTIC MONITORING TEST RESULTS on the repair order, then go to the next step.
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2
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VERIFY RELATED SERVICE INFORMATION AVAILABILITY
• Verify related Service Information availability.
• Is any related Service Information available?
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Yes
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Perform repair or diagnosis according to the available Service 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 CURRENT INPUT SIGNAL STATUS IS CONCERN INTERMITTENT OR CONSTANT
• Start the engine and warm it up completely.
• Access the ECT PID using the M-MDS.
• Is the ECT PID value above 60 °C {140 °F}?
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Yes
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Intermittent concern exists.
• Perform the “INTERMITTENT CONCERN TROUBLESHOOTING” procedure.
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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 CONDITION
• 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 and/or connector, 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 PCM CONNECTOR CONDITION
• Disconnect the PCM 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 and/or connector, 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 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 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 DTC TROUBLESHOOTING COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear the DTC from the PCM memory using the M-MDS.
• Switch the ignition to ON (engine off).
• Access the ECT PID using the M-MDS.
• Wait until the ECT PID value below 8 °C {46 °F}.
• Start the engine and warm it up completely.
• Perform the Pending Trouble Code Access Procedure.
• Is the PENDING CODE for this 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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