DTC P0139:00 [MZR 2.0 DISI]

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 0.12 s for 2 of 3 times. MONITORING CONDITIONS ― Drive Mode 03 (EGR System, 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 (EGR System, 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 • High-pressure side fuel delivery system malfunction ― Fuel pressure sensor (built-in fuel delivery pipe) malfunction ― Spill valve control solenoid valve control circuit malfunction (damaged to driver in PCM caused by short circuit to ground system) ― Spill valve control solenoid valve (built-in high pressure fuel pump) malfunction ― Relief valve (built-in fuel delivery pipe) malfunction ― High pressure fuel pump malfunction • Low-pressure side fuel delivery system malfunction ― Fuel leakage on fuel line (between fuel pump unit and high pressure fuel pump) ― Fuel filter clogged or restricted ― Pressure regulator (built-in fuel pump unit) malfunction ― Fuel pump unit malfunction • Purge solenoid valve malfunction • Engine malfunction ― Leakage engine coolant ― Insufficient engine compression • HO2S malfunction ― HO2S deterioration • PCM malfunction

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 0.12 s for 2 of 3 times.

MONITORING CONDITIONS

― Drive Mode 03 (EGR System, 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 (EGR System, 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

• High-pressure side fuel delivery system malfunction

― Fuel pressure sensor (built-in fuel delivery pipe) malfunction

― Spill valve control solenoid valve control circuit malfunction (damaged to driver in PCM caused by short circuit to ground system)

― Spill valve control solenoid valve (built-in high pressure fuel pump) malfunction

― Relief valve (built-in fuel delivery pipe) malfunction

― High pressure fuel pump malfunction

• Low-pressure side fuel delivery system malfunction

― Fuel leakage on fuel line (between fuel pump unit and high pressure fuel pump)

― Fuel filter clogged or restricted

― Pressure regulator (built-in fuel pump unit) malfunction

― Fuel pump unit malfunction

• Purge solenoid valve malfunction

• Engine malfunction

― Leakage engine coolant

― Insufficient engine compression

• HO2S malfunction

― HO2S deterioration

• PCM malfunction

STEP	INSPECTION	ACTION
1	IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA (MODE 2) • Perform the Freeze Frame PID Data Access Procedure. (See ON-BOARD DIAGNOSTIC TEST [MZR 2.0 DISI].) • 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 2.0 DISI].)
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. (See ON-BOARD DIAGNOSTIC TEST [MZR 2.0 DISI].) • Is the PENDING CODE/DTC P0443:00 also present?	Yes	Go to the applicable PENDING CODE or DTC inspection. (See DTC P0443:00 [MZR 2.0 DISI].)
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 18. (See HEATED OXYGEN SENSOR (HO2S) REMOVAL/INSTALLATION [MZR 2.0 DISI].)
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 18.
No	Go to the next step.
7	INSPECT FUEL LINE LEAKAGE • Visually inspect the leakage from the fuel pump to fuel delivery pipe. • Is there any leakage?	Yes	Repair or replace the malfunctioning part according to the inspection results, then go to Step 18.
No	Go to the next step.
8	INSPECT FUEL PRESSURE (HIGH-SIDE) • Access the FUEL_PRES PID using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [MZR 2.0 DISI].) • Is the FUEL_PRES PID value within the specification? (See PCM INSPECTION [MZR 2.0 DISI].)	Yes	Go to Step 13.
No	Go to the next step.
9	IDENTIFY CAUSE BY FUEL PRESSURE SENSOR OR HIGH PRESSURE FUEL PUMP • Is the vehicle accelerate performance normally?	Yes	Go to the next step.
No	Go to Step 11.
10	INSPECT FUEL PRESSURE SENSOR • Inspect the fuel pressure sensor. (See FUEL PRESSURE SENSOR INSPECTION [MZR 2.0 DISI].) • Is there any malfunction?	Yes	Replace the fuel delivery pipe, then go to Step 18. (See FUEL INJECTOR REMOVAL/INSTALLATION [MZR 2.0 DISI].)
No	Go to Step 13.
11	INSPECT SPILL VALVE CONTROL SOLENOID VALVE CONTROL CIRCUIT FOR SHORT TO GROUND • Switch the ignition to off. • Disconnect the high pressure fuel pump and PCM connectors. • Inspect for continuity between high pressure fuel pump terminal A (wiring harness-side) and body ground. • Is there continuity?	Yes	Repair or replace the wiring harness for a possible short to ground, then go to Step 18.
No	Go to the next step.
12	INSPECT HIGH PRESSURE FUEL PUMP • Replace the high pressure fuel pump. (See HIGH PRESSURE FUEL PUMP REMOVAL/INSTALLATION [MZR 2.0 DISI].) • Access the FUEL_PRES PID using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [MZR 2.0 DISI].) • Is the FUEL_PRES PID value within the specification? (See PCM INSPECTION [MZR 2.0 DISI].)	Yes	High pressure fuel pump or spill valve control solenoid valve (built-in high pressure fuel pump) malfunction. • Go to Step 18.
No	Relief valve (built-in fuel delivery pipe) malfunction. • Replace the fuel delivery pipe, then go to Step 18. (See FUEL INJECTOR REMOVAL/INSTALLATION [MZR 2.0 DISI].)
13	INSPECT FUEL PRESSURE (LOW-SIDE) • Connect the fuel pressure gauge between fuel pump and high pressure fuel pump. • Measure the low side fuel pressure. (See FUEL LINE PRESSURE INSPECTION [MZR 2.0 DISI].) • Is the low side fuel pressure within the specification?	Yes	Go to the next step.
No	Inspect for following: • Fuel line restriction • Fuel filter clogging ― If there is any malfunction: • Repair or replace the malfunctioning part according to the inspection results. ― If there is no malfunction: • Replace the fuel pump unit. (See FUEL PUMP UNIT REMOVAL/INSTALLATION [MZR 2.0 DISI].) Go to Step 18.
14	INSPECT PURGE SOLENOID VALVE AND EVAPORATIVE HOSE • Inspect the purge solenoid valve and vacuum hose connection. (See PURGE SOLENOID VALVE INSPECTION [MZR 2.0 DISI].) (See INTAKE-AIR SYSTEM VACUUM HOSE ROUTING DIAGRAM [MZR 2.0 DISI].) • Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results, then go to Step 18. (See PURGE SOLENOID VALVE REMOVAL/INSTALLATION [MZR 2.0 DISI].)
No	Go to the next step.
15	INSPECT SEALING OF ENGINE COOLANT PASSAGE • Perform the “ENGINE COOLANT LEAKAGE INSPECTION”. (See ENGINE COOLANT LEAKAGE INSPECTION [MZR 2.0 DISI].) • Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results, then go to Step 18.
No	Go to the next step.
16	INSPECT ENGINE COMPRESSION • Inspect the engine compression. (See COMPRESSION INSPECTION [MZR 2.0 DISI].) • Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results, then go to Step 18.
No	Go to the next step.
17	INSPECT HO2S • Switch the ignition to off. • Reconnect all disconnected connectors. • Inspect the HO2S. (See HEATED OXYGEN SENSOR (HO2S) INSPECTION [MZR 2.0 DISI].) • Is there any malfunction?	Yes	Replace the HO2S, then go to the next step. (See HEATED OXYGEN SENSOR (HO2S) REMOVAL/INSTALLATION [MZR 2.0 DISI].)
No	Go to the next step.
18	VERIFY DTC TROUBLESHOOTING COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the M-MDS. (See AFTER REPAIR PROCEDURE [MZR 2.0 DISI].) • Perform the Drive Mode 03 (EGR System, A/F Sensor Heater, HO2S Heater, A/F Sensor, HO2S and TWC Repair Verification Drive Mode). (See OBD DRIVE MODE [MZR 2.0 DISI].) • Is the PENDING CODE for this DTC present?	Yes	Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [MZR 2.0 DISI].)
No	Go to the next step.
19	VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [MZR 2.0 DISI].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [MZR 2.0 DISI].)
No	DTC troubleshooting completed.

STEP

INSPECTION

ACTION

IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA (MODE 2)

• Perform the Freeze Frame PID Data Access Procedure.

(See ON-BOARD DIAGNOSTIC TEST [MZR 2.0 DISI].)

• Is the DTC P0139:00 on FREEZE FRAME DATA (Mode 2)?

Yes

Go to the next step.

Go to the troubleshooting procedure for DTC on FREEZE FRAME DATA (Mode 2).

(See DTC TABLE [MZR 2.0 DISI].)

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.

Record the FREEZE FRAME DATA (Mode 2)/snapshot data and DIAGNOSTIC MONITORING TEST RESULTS on the repair order, then go to the next step.

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.

Go to the next step.

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.

(See ON-BOARD DIAGNOSTIC TEST [MZR 2.0 DISI].)

• Is the PENDING CODE/DTC P0443:00 also present?

Yes

Go to the applicable PENDING CODE or DTC inspection.

(See DTC P0443:00 [MZR 2.0 DISI].)

Go to the next step.

INSPECT INSTALLATION OF HO2S

• Inspect if the HO2S is loosely installed.

• Is the HO2S installed securely?

Yes

Go to the next step.

Retighten the HO2S, then go to Step 18.

(See HEATED OXYGEN SENSOR (HO2S) REMOVAL/INSTALLATION [MZR 2.0 DISI].)

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 18.

Go to the next step.

INSPECT FUEL LINE LEAKAGE

• Visually inspect the leakage from the fuel pump to fuel delivery pipe.

• Is there any leakage?

Yes

Repair or replace the malfunctioning part according to the inspection results, then go to Step 18.

Go to the next step.

INSPECT FUEL PRESSURE (HIGH-SIDE)

• Access the FUEL_PRES PID using the M-MDS.

(See ON-BOARD DIAGNOSTIC TEST [MZR 2.0 DISI].)

• Is the FUEL_PRES PID value within the specification?

(See PCM INSPECTION [MZR 2.0 DISI].)

Yes

Go to Step 13.

Go to the next step.

IDENTIFY CAUSE BY FUEL PRESSURE SENSOR OR HIGH PRESSURE FUEL PUMP

• Is the vehicle accelerate performance normally?

Yes

Go to the next step.

Go to Step 11.

INSPECT FUEL PRESSURE SENSOR

• Inspect the fuel pressure sensor.

(See FUEL PRESSURE SENSOR INSPECTION [MZR 2.0 DISI].)

• Is there any malfunction?

Yes

Replace the fuel delivery pipe, then go to Step 18.

(See FUEL INJECTOR REMOVAL/INSTALLATION [MZR 2.0 DISI].)

Go to Step 13.

INSPECT SPILL VALVE CONTROL SOLENOID VALVE CONTROL CIRCUIT FOR SHORT TO GROUND

• Switch the ignition to off.

• Disconnect the high pressure fuel pump and PCM connectors.

• Inspect for continuity between high pressure fuel pump terminal A (wiring harness-side) and body ground.

• Is there continuity?

Yes

Repair or replace the wiring harness for a possible short to ground, then go to Step 18.

Go to the next step.

INSPECT HIGH PRESSURE FUEL PUMP

• Replace the high pressure fuel pump.

(See HIGH PRESSURE FUEL PUMP REMOVAL/INSTALLATION [MZR 2.0 DISI].)

• Access the FUEL_PRES PID using the M-MDS.

(See ON-BOARD DIAGNOSTIC TEST [MZR 2.0 DISI].)

• Is the FUEL_PRES PID value within the specification?

(See PCM INSPECTION [MZR 2.0 DISI].)

Yes

High pressure fuel pump or spill valve control solenoid valve (built-in high pressure fuel pump) malfunction.

• Go to Step 18.

Relief valve (built-in fuel delivery pipe) malfunction.

• Replace the fuel delivery pipe, then go to Step 18.

(See FUEL INJECTOR REMOVAL/INSTALLATION [MZR 2.0 DISI].)

INSPECT FUEL PRESSURE (LOW-SIDE)

• Connect the fuel pressure gauge between fuel pump and high pressure fuel pump.

• Measure the low side fuel pressure.

(See FUEL LINE PRESSURE INSPECTION [MZR 2.0 DISI].)

• Is the low side fuel pressure within the specification?

Yes

Go to the next step.

Inspect for following:

• Fuel line restriction

• Fuel filter clogging

― If there is any malfunction:

• Repair or replace the malfunctioning part according to the inspection results.

― If there is no malfunction:

• Replace the fuel pump unit.

(See FUEL PUMP UNIT REMOVAL/INSTALLATION [MZR 2.0 DISI].)

Go to Step 18.

INSPECT PURGE SOLENOID VALVE AND EVAPORATIVE HOSE

• Inspect the purge solenoid valve and vacuum hose connection.

(See PURGE SOLENOID VALVE INSPECTION [MZR 2.0 DISI].)

(See INTAKE-AIR SYSTEM VACUUM HOSE ROUTING DIAGRAM [MZR 2.0 DISI].)

• Is there any malfunction?

Yes

Repair or replace the malfunctioning part according to the inspection results, then go to Step 18.

(See PURGE SOLENOID VALVE REMOVAL/INSTALLATION [MZR 2.0 DISI].)

Go to the next step.

INSPECT SEALING OF ENGINE COOLANT PASSAGE

• Perform the “ENGINE COOLANT LEAKAGE INSPECTION”.

(See ENGINE COOLANT LEAKAGE INSPECTION [MZR 2.0 DISI].)

• Is there any malfunction?

Yes

Repair or replace the malfunctioning part according to the inspection results, then go to Step 18.

Go to the next step.

INSPECT ENGINE COMPRESSION

• Inspect the engine compression.

(See COMPRESSION INSPECTION [MZR 2.0 DISI].)

• Is there any malfunction?

Yes

Repair or replace the malfunctioning part according to the inspection results, then go to Step 18.

Go to the next step.

INSPECT HO2S

• Switch the ignition to off.

• Reconnect all disconnected connectors.

• Inspect the HO2S.

(See HEATED OXYGEN SENSOR (HO2S) INSPECTION [MZR 2.0 DISI].)

• Is there any malfunction?

Yes

Replace the HO2S, then go to the next step.

(See HEATED OXYGEN SENSOR (HO2S) REMOVAL/INSTALLATION [MZR 2.0 DISI].)

Go to the next step.

VERIFY DTC TROUBLESHOOTING COMPLETED

• Make sure to reconnect all disconnected connectors.

• Clear the DTC from the PCM memory using the M-MDS.

(See AFTER REPAIR PROCEDURE [MZR 2.0 DISI].)

• Perform the Drive Mode 03 (EGR System, A/F Sensor Heater, HO2S Heater, A/F Sensor, HO2S and TWC Repair Verification Drive Mode).

(See OBD DRIVE MODE [MZR 2.0 DISI].)

• Is the PENDING CODE for this DTC present?

Yes

Replace the PCM, then go to the next step.

(See PCM REMOVAL/INSTALLATION [MZR 2.0 DISI].)

Go to the next step.

VERIFY AFTER REPAIR PROCEDURE

• Perform the “AFTER REPAIR PROCEDURE”.

(See AFTER REPAIR PROCEDURE [MZR 2.0 DISI].)

• Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [MZR 2.0 DISI].)

DTC troubleshooting completed.