DTC P0131:00 [PCM (SKYACTIV-G (US))]
DTC P0131:00 [PCM (SKYACTIV-G (US))]
SM2565558
id0102t47022u0
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Note
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• To determine the malfunctioning part, proceed with the diagnostics from “Function Inspection Using M-MDS”.
Details On DTCs
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Description |
A/F sensor circuit low input |
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Detection condition
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Determination conditions
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• Any one of the following conditions is met:
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Preconditions
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• Switch the ignition ON (engine off or on)
• Battery voltage: 11—18 V *1
• The following DTC is not detected:
*1: Standard can be verified by displaying PIDs using M-MDS
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Drive cycle
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• 2
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Self test type
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• CMDTC self test, KOER self test
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Sensor used
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• A/F sensor
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Fail-safe function
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• Fixes duty value of A/F sensor heater
• Stops fuel feedback control of A/F sensor
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Vehicle status when DTCs are output
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• Not applicable
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Possible cause
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• A/F sensor connector or terminals malfunction
• PCM connector or terminals malfunction
• Short to ground in any of the following A/F sensor circuits.
• A/F sensor malfunction
• PCM malfunction
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Function Explanation (DTC Detection Outline)
• If any of the following conditions is detected, the PCM determines a short to ground between the A/F sensor terminal and PCM terminal and stores a DTC.
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― Voltage of A/F sensor terminal F is less than specified value― Voltage of A/F sensor terminal D is less than specified value― Voltage of A/F sensor terminal B is less than specified value
Repeatability Verification Procedure
1. Start the engine and leave it idling for 1 min.
PID Item/Simulation Item Used In Diagnosis
PID/DATA monitor item table
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PIDs |
Reference |
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A/F_SEN_CUR
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Function Inspection Using M-MDS
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Step |
Inspection |
Results |
Action |
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1
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PURPOSE: VERIFY RELATED REPAIR INFORMATION OR SERVICE INFORMATION AVAILABILITY
• Verify related Service Bulletins, on-line repair information, or Service Information availability.
• Is any related Information available?
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Yes
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Perform repair or diagnosis according to the available 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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2
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PURPOSE: RECORD VEHICLE STATUS WHEN DTC WAS DETECTED TO UTILIZE WITH REPEATABILITY VERIFICATION
• Record the freeze frame data/snapshot data and diagnostic monitoring test results (A/F sensor, HO2S related).
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Go to Troubleshooting Diagnostic Procedure to perform the procedure from Step 1.
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Troubleshooting Diagnostic Procedure
Intention of troubleshooting procedure
• Step 1—2
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― Perform an inspection of the A/F sensor and PCM-related connectors.
• Step 3
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― Perform an inspection of the short to ground in wiring harness between A/F sensor and PCM.
• Step 4
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― Perform a unit inspection of the A/F sensor.
• Repair completion verification
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― Verify that the primary malfunction is resolved and there are no other malfunctions.
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Step |
Inspection |
Results |
Action |
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1
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PURPOSE: INSPECT A/F SENSOR CONNECTOR FOR MALFUNCTION
• Inspect the applicable connector and terminal. (See CONNECTOR INSPECTION.)
• Are the connector and terminal normal?
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Yes
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Go to the next step.
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No
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Repair or replace the malfunctioning location and perform the repair completion verification.
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2
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PURPOSE: INSPECT PCM CONNECTOR FOR MALFUNCTION
• Inspect the applicable connector and terminal. (See CONNECTOR INSPECTION.)
• Are the connector and terminal normal?
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Yes
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Go to the next step.
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No
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Repair or replace the malfunctioning location and perform the repair completion verification.
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3
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PURPOSE: INSPECT A/F SENSOR CONTROL CIRCUIT AND SIGNAL CIRCUIT FOR SHORT TO GROUND
• Inspect the applicable circuit for a short to ground. (See CIRCUIT INSPECTION.)
• Is the circuit normal?
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Yes
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Go to the next step.
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No
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Repair or replace the malfunctioning location and perform the repair completion verification.
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4
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PURPOSE: DETERMINE INTEGRITY OF A/F SENSOR
• Start the engine and warm it up completely.
• Access the A/F_SEN_CUR PID using the M-MDS. (See PID/DATA MONITOR INSPECTION.)
• Drive the vehicle under the following conditions.
• Is the displayed PID value as follows?
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Yes
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Go to the next step.
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No
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Replace the A/F sensor and perform the repair completion verification.
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Repair completion verification 1
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PURPOSE: VERIFY THAT VEHICLE IS REPAIRED
• Install/connect the part removed/disconnected during the troubleshooting procedure.
• Clear the DTC recorded in the memory. (See CLEARING DTC.)
• Replicate the vehicle conditions at the time the DTC was detected using the following procedure.
• Perform the DTC inspection for the PCM. (See DTC INSPECTION.)
• Is the same Pending DTC present?
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Yes
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Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error.
If the CAN communication is normal, perform the diagnosis from Step 1.
• If the malfunction recurs, replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [SKYACTIV-G (WITH CYLINDER DEACTIVATION (US))].) (See PCM REMOVAL/INSTALLATION [SKYACTIV-G (WITHOUT CYLINDER DEACTIVATION (US))].)
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No
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Go to the next step.
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Repair completion verification 2
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PURPOSE: VERIFY IF OTHER DTCs DISPLAYED
• Perform the DTC inspection. (See DTC INSPECTION.)
• Are any other DTCs displayed?
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Yes
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Repair the malfunctioning location according to the applicable DTC troubleshooting.
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No
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DTC troubleshooting completed.
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