DTC P0140:00 [PCM (SKYACTIV-G (US))]
DTC P0140:00 [PCM (SKYACTIV-G (US))]
SM2565563
id0102t47027u0
-
Note
-
• To determine the malfunctioning part, proceed with the diagnostics from “Function Inspection Using M-MDS”.
Details On DTCs
|
Description |
HO2S circuit no activity detected |
||
|---|---|---|---|
|
Detection condition
|
Determination conditions
|
• With the estimated temperature of the HO2S element exceeding the specified value, a condition in which the HO2S signal voltage is less than the specified value continues for the specified period.
|
|
|
Preconditions
|
• Battery voltage: above 11 V *1
• The following DTCs are not detected:
*1: Standard can be verified by displaying PIDs using M-MDS
|
||
|
Drive cycle
|
• 2
|
||
|
Self test type
|
• CMDTC self test
|
||
|
Sensor used
|
• HO2S
|
||
|
Fail-safe function
|
• Not applicable
|
||
|
Vehicle status when DTCs are output
|
• Not applicable
|
||
|
Possible cause
|
• HO2S signal line error
• HO2S incorrect installation
• HO2S malfunction
• Exhaust gas leakage from exhaust system (between A/F sensor and HO2S)
• Insufficient engine compression
• HO2S heater malfunction
• PCM malfunction
|
||
 |
|||
 |
 |
||
Function Explanation (DTC Detection Outline)
• If the output voltage of the HO2S continues to be low for the specified time or more even though the estimated temperature of the HO2S element after the engine is started exceeds the specified value, the PCM determines that the HO2S is not activating, and stores a DTC. The malfunction determination time varies depending on the intake air amount.
Repeatability Verification Procedure
1. Warm up the engine to allow the engine coolant temperature to reach 80 °C {176 °F} or more.
2. Start the engine and leave it idling for 1 min.
-
Note
-
• Match the engine coolant temperature in the recorded freeze frame data/snapshot data, the vehicle speed, and engine speed values to the best extent possible while driving the vehicle.
3. Try to reproduce the malfunction by driving the vehicle for 5 min based on the values in the freeze frame data/snapshot data.
PID Item/Simulation Item Used In Diagnosis
PID/DATA monitor item table
|
PIDs |
Reference |
|---|---|
|
HO2S_HEAT
|
|
|
HO2S_OUT_VOLT
|
Function Inspection Using M-MDS
|
Step |
Inspection |
Results |
Action |
|---|---|---|---|
|
1
|
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?
|
Yes
|
Perform repair or diagnosis according to the available information.
• If the vehicle is not repaired, go to the next step.
|
|
No
|
Go to the next step.
|
||
|
2
|
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).
|
—
|
Go to the next step.
|
|
3
|
PURPOSE: VERIFY CONNECTOR CONNECTIONS
• Start the engine.
• Access the following PIDs using the M-MDS: (See PID/DATA MONITOR INSPECTION.)
• When the following parts are shaken, does the PID value include a PID item which has changed?
|
Yes
|
Repair or replace the applicable connector parts.
Go to Troubleshooting Diagnostic Procedure to perform the repair completion verification.
|
|
No
|
Go to the next step.
|
||
|
4
|
PURPOSE: VERIFICATION IF MALFUNCTION CAUSED BY HO2S
• Start the engine and idle it.
• Access the HO2S_OUT_VOLT PID using the M-MDS. (See PID/DATA MONITOR INSPECTION.)
• Is the HO2S_OUT_VOLT PID value normal? (See PID/DATA MONITOR TABLE [PCM (SKYACTIV-G (US))].)
|
Yes
|
Go to the next step.
|
|
No
|
Go to Troubleshooting Diagnostic Procedure to perform the procedure from Step 1.
|
||
|
5
|
PURPOSE: VERIFICATION IF MALFUNCTION CAUSED BY HO2S HEATER
• Start the engine and idle it.
• Access the HO2S_HEAT PID using the M-MDS. (See PID/DATA MONITOR INSPECTION.)
• Is the HO2S_HEAT PID value normal? (See PID/DATA MONITOR TABLE [PCM (SKYACTIV-G (US))].)
|
Yes
|
Go to Troubleshooting Diagnostic Procedure to perform the procedure from Step 1.
|
|
No
|
Go to Troubleshooting Diagnostic Procedure to perform the procedure from Step 9.
|
Troubleshooting Diagnostic Procedure
Intention of troubleshooting procedure
• Step 1—4
-
― Perform an inspection of the HO2S signal line-related parts.
• Step 5—6
-
― Verify the condition of the HO2S installation and perform a unit inspection.
• Step 7
-
― Perform an exhaust system parts inspection.
• Step 8
-
― Perform an inspection of the engine compression.
• Step 9
-
― Perform an inspection of the HO2S heater.
• Repair completion verification
-
― Verify that the primary malfunction is resolved and there are no other malfunctions.
|
Step |
Inspection |
Results |
Action |
|---|---|---|---|
|
1
|
PURPOSE: INSPECT HO2S CONNECTOR FOR MALFUNCTION
• Inspect the applicable connector and terminal. (See CONNECTOR INSPECTION.)
• Are the connector and terminal normal?
|
Yes
|
Go to the next step.
|
|
No
|
Repair or replace the malfunctioning location and perform the repair completion verification.
|
||
|
2
|
PURPOSE: INSPECT PCM CONNECTOR FOR MALFUNCTION
• Inspect the applicable connector and terminal. (See CONNECTOR INSPECTION.)
• Are the connector and terminal normal?
|
Yes
|
Go to the next step.
|
|
No
|
Repair or replace the malfunctioning location and perform the repair completion verification.
|
||
|
3
|
PURPOSE: INSPECT HO2S SIGNAL CIRCUIT FOR SHORT TO GROUND
• Inspect the applicable circuit for a short to ground. (See CIRCUIT INSPECTION.)
• Is the circuit normal?
|
Yes
|
Go to the next step.
|
|
No
|
Repair or replace the malfunctioning location and perform the repair completion verification.
|
||
|
4
|
PURPOSE: INSPECT HO2S SIGNAL CIRCUIT FOR OPEN CIRCUIT
• Inspect the applicable circuit for open circuit. (See CIRCUIT INSPECTION.)
• Is the circuit normal?
|
Yes
|
Go to the next step.
|
|
No
|
Repair or replace the malfunctioning location and perform the repair completion verification.
|
||
|
5
|
PURPOSE: VERIFY IF HO2S IS INSTALLED CORRECTLY
• Verify the HO2S installation condition. (Installation angle, tightening torque value) (See HEATED OXYGEN SENSOR (HO2S) REMOVAL/INSTALLATION [SKYACTIV-G (WITH CYLINDER DEACTIVATION (US))].) (See HEATED OXYGEN SENSOR (HO2S) REMOVAL/INSTALLATION [SKYACTIV-G (WITHOUT CYLINDER DEACTIVATION (US))].)
• Is the installation condition normal?
|
Yes
|
Go to the next step.
|
|
No
|
Correctly install the HO2S and perform the repair completion verification.
|
||
|
6
|
PURPOSE: INSPECT HO2S FOR MALFUNCTION
• Inspect the applicable part. (See HEATED OXYGEN SENSOR (HO2S) INSPECTION [SKYACTIV-G (WITH CYLINDER DEACTIVATION (US))].) (See HEATED OXYGEN SENSOR (HO2S) INSPECTION [SKYACTIV-G (WITHOUT CYLINDER DEACTIVATION (US))].)
• Is the part normal?
|
Yes
|
Go to the next step.
|
|
No
|
Repair or replace the malfunctioning location and perform the repair completion verification.
|
||
|
7
|
PURPOSE: VERIFY IF MALFUNCTION RELATED TO EMISSION SYSTEM AFFECTS HO2S SIGNAL
• Verify the exhaust gas leakage from the exhaust system. (between A/F sensor and HO2S)
• Is there any malfunction?
|
Yes
|
Repair or replace the malfunctioning location and perform the repair completion verification.
|
|
No
|
Go to the next step.
|
||
|
8
|
PURPOSE: VERIFY IF MALFUNCTION RELATED TO ENGINE COMPRESSION AFFECTS DIAGNOSTIC RESULTS
• Inspect the engine compression. (See COMPRESSION INSPECTION [SKYACTIV-G (WITH CYLINDER DEACTIVATION (US))].) (See COMPRESSION INSPECTION [SKYACTIV-G (WITHOUT CYLINDER DEACTIVATION (US))].)
• Are compression pressures within specification?
|
Yes
|
Go to the next step.
|
|
No
|
Replace or overhaul the engine and perform the repair completion verification.
|
||
|
9
|
PURPOSE: INSPECT HO2S HEATER FOR MALFUNCTION
• Inspect the applicable part. (See HEATED OXYGEN SENSOR (HO2S) INSPECTION [SKYACTIV-G (WITH CYLINDER DEACTIVATION (US))].) (See HEATED OXYGEN SENSOR (HO2S) INSPECTION [SKYACTIV-G (WITHOUT CYLINDER DEACTIVATION (US))].)
• Is the part normal?
|
Yes
|
Go to the next step.
|
|
No
|
Repair or replace the malfunctioning location and perform the repair completion verification.
|
||
|
Repair completion verification 1
|
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?
|
Yes
|
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))].)
|
|
No
|
Go to the next step.
|
||
|
Repair completion verification 2
|
PURPOSE: VERIFY IF OTHER DTCs DISPLAYED
• Perform the DTC inspection. (See DTC INSPECTION.)
• Are any other DTCs displayed?
|
Yes
|
Repair the malfunctioning location according to the applicable DTC troubleshooting.
|
|
No
|
DTC troubleshooting completed.
|