DTC P0133

BHE010200100W17

DTC P0133

Front HO2S circuit slow response

DETECTION CONDITION

• The PCM monitors the front HO2S output current and short term fuel trim (SHRTFT) when the following conditions are met. If the output current response is lower than that expected from the fuel trim, the PCM determines that the front HO2S circuit response is slow.
MONITORING CONDITION
– Front HO2S heater monitor: Completed
– Fuel system loop status: Closed loop fuel control
– Engine speed: 2,000-3,500 rpm
– LOAD: 30.0-50.0 %

Diagnostic support note

• This is an intermittent monitor (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 the first drive cycle.
• FREEZE FRAME DATA is available.
• The DTC is stored in the PCM memory.

POSSIBLE CAUSE

• Purge solenoid valve malfunction
• Looseness of front HO2S
• Leakage exhaust gas
• Front HO2S malfunction
• Fuel line pressure malfunction
• Leakage fuel
• Fuel pump unit malfunction
• AIR system malfunction
• Leakage engine coolant
• TP sensor malfunction
• Eccentric shaft position sensor malfunction
• PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION

1

VERIFY FREEZE FRAME DATA HAS BEEN RECORDED

• Has FREEZE FRAME DATA been recorded?
Yes
Go to the next step.
No
Record the FREEZE FRAME DATA on the repair order, then go to the next step.
2

VERIFY RELATED REPAIR INFORMATION AVAILABILITY

• Verify related service repair information availability.
• Is any related repair information available?
Yes
Perform repair or diagnosis according to the available repair information.
• If the vehicle is not repaired, go to the next step.
No
Go to the next step.
3

VERIFY RELATED PENDING CODE OR STORED DTC

• Turn the ignition switch off, then to the ON position (Engine off).
• Verify the related PENDING CODE or stored DTCs.
• Is the DTC P0443 also present?
Yes
Go to the DTC P0443 inspection.
(See DTC P0443.)
No
Go to the next step.
4

IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA

• Is DTC P0133 on FREEZE FRAME DATA?
Yes
Go to the next step.
No
Go to the FREEZE FRAME DATA DTC inspection.
(See DTC TABLE.)
5

VERIFY CURRENT INPUT SIGNAL STATUS OF FRONT HO2S

• Connect the WDS or equivalent to the DLC-2.
• Start the engine and warm it up completely.
• Access the O2S11 PID.
• Read the O2S11 PID under following accelerator pedal conditions (in PARK or NEUTRAL).
– Less than 1 mA when the accelerator pedal is suddenly depressed (rich condition).
– More than 1 mA just after release of accelerator pedal (lean condition).
• Is the PID normal?
Yes
Go to Step 8.
No
Go to the next step.
6

INSPECT INSTALLATION OF FRONT HO2S

• Inspect the front HO2S for looseness.
• Is it normal?
Yes
Go to the next step.
No
Tighten the front HO2S, then go to Step 14.
7

INSPECT EXHAUST SYSTEM FOR EXHAUST GAS LEAKAGE

• Visually inspect exhaust gas leakage in the exhaust system.
• Is there exhaust gas leakage?
Yes
Repair or replace the malfunctioning part, then go to Step 16.
No
Replace the front HO2S, then go to Step 16.
8

INSPECT LONG TERM FUEL TRIM

• Connect the WDS or equivalent to the DLC-2.
• Access the LONGFT1 PID.
• Compare the LONGFT1 PID with recorded FREEZE FRAME DATA at Step 1.
• Is the LONGFT1 PID below FREEZE FRAME DATA?
Yes
Engine is driven under rich condition.
Go to the next step.
No
Engine is driven under lean condition.
Go to Step 10.
9

INSPECT FUEL LINE PRESSURE (EXCESSIVE FUEL LINE PRESSURE)

• Perform the "FUEL LINE PRESSURE INSPECTION".
• Is there any malfunction?
Yes
Repair or replace the malfunctioning part according to the inspection results.
Then go to the Step 16.
No
Go to the next step.
10

INSPECT FUEL LINE PRESSURE (LOW FUEL LINE PRESSURE)

• Perform the "FUEL LINE PRESSURE INSPECTION".
• Is there any malfunction?
Yes
Go to the next step.
No
Go to step 12.
11

INSPECT FUEL SYSTEM FOR FUEL LEAKAGE

• Visually inspect fuel leakage in the fuel system.
• Is there fuel leakage?
Yes
Repair or replace the malfunctioning part, then go to Step 16.
No
Replace the fuel pump unit, then go to Step 16.
12

INSPECT AIR SYSTEM OPERATION

• Perform the "AIR System Inspection".
• Is there any malfunction?
Yes
Repair or replace the malfunctioning part according to the inspection results.
Then go to Step 16.
No
Go to the next step.
13

INSPECT ENGINE COOLANT PASSAGE FOR ENGINE COOLANT LEAKAGE

• 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 16.
No
Go to the next step.
14

INSPECT TP SENSOR

• Inspect the TP sensor.
• Is there any malfunction?
Yes
Replace the throttle body, then go to Step 16.
No
Go to the next step.
15

INSPECT ECCENTRIC SHAFT POSITION SENSOR

• Inspect the eccentric shaft position sensor.
• Is there any malfunction?
Yes
Replace the eccentric shaft position sensor, then go to the next step.
No
Go to the next step.
16

VERIFY TROUBLESHOOTING OF DTC P0133 COMPLETED

• Make sure to reconnect all disconnected connectors.
• Clear the DTC from the PCM memory using the WDS or equivalent.
• Perform the DRIVE MODE 1 and 3.
• Is the PENDING CODE same as the DTC present?
Yes
Replace the PCM, then go to the next step.
No
Go to the next step.
17

VERIFY AFTER REPAIR PROCEDURE

• Perform the "AFTER REPAIR PROCEDURE".
• Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE.)
No
DTC troubleshooting completed.