DTC P0139:00 [MZR 1.8, MZR 2.0, MZR 2.5]

id0102f4300400

DTC P0139:00

HO2S circuit slow response
DETECTION CONDITION
•  The PCM monitors the rich (0.55 V) to lean (0.3 V) response time of the HO2S. The PCM measures the response time when the following conditions are met. The PCM determines a HO2S response deterioration malfunction when the measured response time is more than 0.08 s for 2 of 3 times.
MONITORING CONDITIONS
―  Drive Mode 03 (A/F Sensor Heater, HO2S Heater, A/F Sensor, HO2S and TWC Repair Verification Drive Mode)
―  Following conditions are met:
•  During deceleration fuel cut
•  Estimated temperature of the zirconia element inside the HO2S: above 450 °C {842 °F}
•  The PCM monitors for a time-out malfunction (when HO2S remains above 0.2 V for longer than a specified period of time during fuel cut control). The PCM measures the amount of time from when the following conditions are met until the HO2S output voltage drops below 0.2 V. The PCM determines a HO2S time-out malfunction when the detected time is more than 4 s for 2 of 3 times.
MONITORING CONDITIONS
―  Drive Mode 03 (A/F Sensor Heater, HO2S Heater, A/F Sensor, HO2S and TWC Repair Verification Drive Mode)
―  Following conditions are met:
•  During deceleration fuel cut
•  Estimated temperature of the zirconia element inside the HO2S: above 450 °C {842 °F}
Diagnostic support note
•  This is an intermittent monitor (A/F sensor, HO2S).
•  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.
POSSIBLE CAUSE
•  HO2S malfunction
―  Looseness HO2S
―  Leakage exhaust system
•  Fuel supply system malfunction or improper fuel line pressure
―  Fuel leakage in fuel line between fuel distributor and fuel pump
―  Clogged or restricted in fuel filter (built-in fuel pump unit)
―  Pressure regulator malfunction (built-in fuel pump unit)
―  Fuel pump unit malfunction
•  Purge solenoid valve malfunction
•  Engine malfunction
―  Engine coolant leakage
―  Insufficient engine compression
•  HO2S malfunction
―  HO2S deterioration
•  PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA (MODE 2)
•  Perform the Freeze Frame PID Data Access Procedure.
•  Is the DTC P0139:00 on FREEZE FRAME DATA (Mode 2)?
Yes
Go to the next step.
No
Go to the troubleshooting procedure for DTC on FREEZE FRAME DATA (Mode 2).
(See DTC TABLE [MZR 1.8, MZR 2.0, MZR 2.5].)
2
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 (A/F sensor, HO2S related) been recorded?
Yes
Go to the next step.
No
Record the FREEZE FRAME DATA (Mode 2)/snapshot data and DIAGNOSTIC MONITORING TEST RESULTS on the repair order, then go to the next step.
3
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.
4
VERIFY RELATED PENDING CODE AND/OR DTC
•  Switch the ignition to off, then to ON (engine off).
•  Perform the Pending Trouble Code Access Procedure and DTC Reading Procedure.
•  Is the PENDING CODE/DTC P0443:00 also present?
Yes
Go to the applicable PENDING CODE or DTC inspection.
(See DTC P0443:00 [MZR 1.8, MZR 2.0, MZR 2.5].)
No
Go to the next step.
5
INSPECT INSTALLATION OF HO2S
•  Inspect if the HO2S is loosely installed.
•  Is the HO2S installed securely?
Yes
Go to the next step.
No
Retighten the HO2S, then go to Step 14.
(See HEATED OXYGEN SENSOR (HO2S) REMOVAL/INSTALLATION [MZR 1.8, MZR 2.0, MZR 2.5].)
6
INSPECT GAS LEAKAGE FROM EXHAUST SYSTEM
•  Visually inspect for the exhaust gas leakage between exhaust manifold and HO2S.
•  Is there any leakage?
Yes
Repair or replace the malfunctioning part according to the inspection results, then go to Step 14.
No
Go to the next step.
7
INSPECT FUEL LINE PRESSURE
•  Switch the ignition to off.
Note
•  If the engine will not start, inspect the fuel line pressure with ignition is switched to ON.
•  Inspect the fuel line pressure while the engine running.
•  Is there any malfunction?
Yes
Go to the next step.
No
Go to Step 10.
8
INSPECT FUEL LINE LEAKAGE
•  Visually inspect the leakage from fuel line between fuel distributor and fuel pump unit.
•  Is there any leakage?
Yes
Repair or replace the malfunctioning part according to the inspection results, then go to Step 14.
No
Go to the next step.
9
INSPECT FUEL FILTER
•  Visually inspect the foreign materials or stain inside fuel filter (low-pressure side).
•  Is there any foreign materials or stain?
Yes
Clean the fuel tank and filter (low-pressure side), then go to Step 14.
No
Replace the fuel pump unit, then go to Step 14.
(See FUEL PUMP UNIT REMOVAL/INSTALLATION [MZR 1.8, MZR 2.0, MZR 2.5].)
10
INSPECT PURGE SOLENOID VALVE AND EVAPORATIVE HOSE
•  Inspect the purge solenoid valve and vacuum hose connection.
•  Is there any malfunction?
Yes
Repair or replace the malfunctioning part according to the inspection results, then go to Step 14.
(See PURGE SOLENOID VALVE REMOVAL/INSTALLATION [MZR 1.8, MZR 2.0, MZR 2.5].)
No
Go to the next step.
11
INSPECT SEALING OF ENGINE COOLANT PASSAGE
•  Perform the “ENGINE COOLANT LEAKAGE INSPECTION”.
•  Is there any malfunction?
Yes
Repair or replace the malfunctioning part according to the inspection results, then go to Step 14.
No
Go to the next step.
12
INSPECT ENGINE COMPRESSION
•  Inspect the engine compression.
•  Is there any malfunction?
Yes
Repair or replace the malfunctioning part according to the inspection results, then go to Step 14.
No
Go to the next step.
13
INSPECT HO2S
•  Switch the ignition to off.
•  Reconnect all disconnected connectors.
•  Inspect the HO2S.
•  Is there any malfunction?
Yes
Replace the HO2S, then go to the next step.
(See HEATED OXYGEN SENSOR (HO2S) REMOVAL/INSTALLATION [MZR 1.8, MZR 2.0, MZR 2.5].)
No
Go to the next step.
14
VERIFY DTC TROUBLESHOOTING COMPLETED
•  Make sure to reconnect all disconnected connectors.
•  Clear the DTC from the PCM memory using the M-MDS.
•  Perform the Drive Mode 03 (A/F Sensor Heater, HO2S Heater, A/F Sensor, HO2S and TWC Repair Verification Drive Mode).
•  Is the PENDING CODE for this DTC present?
Yes
Replace the PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION [MZR 1.8, MZR 2.0, MZR 2.5].)
No
Go to the next step.
15
VERIFY AFTER REPAIR PROCEDURE
•  Perform the “AFTER REPAIR PROCEDURE”.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [MZR 1.8, MZR 2.0, MZR 2.5].)
No
DTC troubleshooting completed.