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DTC P0133:00 [PCM (SKYACTIV-G 2.0)]

NOTE:

  • To determine the malfunctioning part, proceed with the diagnostics from "Function Inspection Using M-MDS".

Details On DTCs

DESCRIPTION

A/F sensor circuit slow response

DETECTION CONDITION

Determination conditions

  • The response speed of the A/F sensor input signal when the air/fuel ratio is fluctuated is slow.

Preconditions

  • Engine speed: Within specified range

  • Charging efficiency: Within specified range

  • Engine coolant temperature: Specified value or more

  • Mass airflow: Within specified range

  • The following DTCs are not detected:

    • A/F sensor heater: P0031:00, P0032:00

    • ECT sensor No.1: P0117:00, P0118:00

    • VSS signal: P0500:00

    • Misfire: P0300:00, P0301:00, P0302:00, P0303:00, P0304:00

    • Fuel injection correction: P0171:00, P0172:00, P2096:00, P2097:00

Drive cycle

  • 2

Self test type

  • CMDTC self test

Sensor used

  • A/F sensor

FAIL-SAFE FUNCTION

  • Fixes duty value of A/F sensor heater

  • Stops fuel feedback control of A/F sensor

VEHICLE STATUS WHEN DTCs ARE OUTPUT

  • Illuminates check engine light.

POSSIBLE CAUSE

  • A/F sensor signal malfunction

    • A/F sensor connector or terminals malfunction

    • A/F sensor loose

    • Exhaust system leakage

  • A/F sensor deterioration

  • A/F sensor heater malfunction

  • PCM malfunction

System Wiring Diagram

  • Not applicable

Function Explanation (DTC Detection Outline)

  • The PCM detects the oxygen concentration in the exhaust gas based on the A/F sensor signal. By intentionally increasing/decreasing the fuel injection amount, the PCM controls the oxygen concentration in the exhaust gas to rich or lean and monitors the response speed of the A/F sensor to sudden changes in the oxygen concentration. If the response speed of the signal input from the A/F sensor is slow while switching repeatedly between rich and lean, the PCM determines an A/F sensor malfunction and stores a DTC.

Repeatability Verification Procedure

  • Warm up the engine to allow the engine coolant temperature to reach 80 °C {176 °F} or more.

  • Start the engine and leave it idling for 1 min.

  • Shift to 3rd gear and drive the vehicle for 10 min at an engine speed of 1,500 rpm or more and a vehicle speed of 50 km/h {31 mph} or more.

    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.

  • 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

Item

Definition

Unit

Condition/Specification

HTR11

A/F sensor heater operation status

Off/On

  • Ignition switched ON (engine off): Off

  • Idle (after warm up): On

A/F sensor heater control duty value

%

  • Ignition switched ON (engine off): 0%

  • Idle (after warm up): 71.37% (ECT is 91 °C {196 °F})

O2S11

A/F sensor current

µA

  • Idle (after warm up): ???59 µA (ECT is 92 °C {198 °F})

  • Deceleration fuel cut (accelerator pedal released from engine speed of 4,000 rpm or more): Approx. 3.48 mA (ECT is 92 °C {198 °F})

Function Inspection Using M-MDS

STEP

INSPECTION

RESULTS

ACTION

1

 PURPOSE: VERIFY RELATED REPAIR INFORMATION AVAILABILITY

  • Verify related Service Bulletins and/or on-line 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.

2

 PURPOSE: IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA

  • Is the DTC P0133:00 on FREEZE FRAME DATA?

Yes

Go to the next step.

No

Go to the troubleshooting procedure for DTC on FREEZE FRAME DATA.

(See DTC TABLE [PCM (SKYACTIV-G 2.0)].)

3

 PURPOSE: RECORD FREEZE FRAME DATA/SNAPSHOT DATA AND DIAGNOSTIC MONITORING TEST RESULTS TO UTILIZE WITH REPEATABILITY VERIFICATION

NOTE:

  • Recording can be facilitated using the screen capture function of the PC.

  • Record the FREEZE FRAME DATA/snapshot data and DIAGNOSTIC MONITORING TEST RESULTS (A/F sensor, HO2S related) on the repair order.

???

Go to the next step.

4

 PURPOSE: VERIFY IF DIAGNOSTIC RESULT IS AFFECTED BY DTC OCCURRING FROM A/F SENSOR UNIT

  • Switch the ignition off, then ON (engine off).

  • Perform the Pending Trouble Code Access Procedure and DTC Reading Procedure.

    (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-G 2.0)].)

  • Is the PENDING CODE/DTC P0131:00, P0132:00, P0134:00, P2237:00, P2243:00 or P2251:00 also present?

Yes

Go to the applicable DTC inspection.

(See DTC P0131:00 [PCM (SKYACTIV-G 2.0)].)

(See DTC P0132:00 [PCM (SKYACTIV-G 2.0)].)

(See DTC P0134:00 [PCM (SKYACTIV-G 2.0)].)

(See DTC P2237:00 [PCM (SKYACTIV-G 2.0)].)

(See DTC P2243:00 [PCM (SKYACTIV-G 2.0)].)

(See DTC P2251:00 [PCM (SKYACTIV-G 2.0)].)

Go to the next step.

No

Go to the next step.

5

 PURPOSE: VERIFY A/F SENSOR

Yes

Go to the next step.

No

Go to the troubleshooting procedure to perform the procedure from Step 1.

6

 PURPOSE: VERIFY A/F SENSOR HEATER

Yes

Go to the next step.

No

Go to the troubleshooting procedure to perform the procedure from Step 5.

7

 PURPOSE: VERIFY DTC

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [PCM (SKYACTIV-G 2.0)].)

Go to the troubleshooting procedure to perform the procedure from Step 1.

No

Go to the troubleshooting procedure to perform the procedure from Step 1.

Troubleshooting Diagnostic Procedure

    Intention of troubleshooting procedure

  • Step 1???5

    • Perform inspection of A/F sensor signal related parts.

  • Step 6

    • Verify that the primary malfunction is resolved and there are no other malfunctions.

STEP

INSPECTION

RESULTS

ACTION

1

 PURPOSE: INSPECT A/F SENSOR CONNECTOR CONDITION

  • Switch the ignition off.

  • Disconnect the A/F sensor connector.

  • Inspect for poor connection (such as damaged/pulled-out pins, corrosion).

  • Is there any malfunction?

Yes

Repair or replace the connector and/or terminals, then go to Step 6.

No

Go to the next step.

2

 PURPOSE: INSPECT INSTALLATION OF A/F SENSOR

  • Inspect installation of A/F sensor.

  • Is the A/F sensor installed securely?

Yes

Go to the next step.

No

Retighten the A/F sensor, then go to Step 6.

(See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)

3

 PURPOSE: VERIFY IF MALFUNCTION RELATED TO EMISSION SYSTEM AFFECTS A/F SENSOR SIGNAL

  • Inspect for exhaust gas leakage from the exhaust system. (between A/F sensor and HO2S)

  • Is there any malfunction?

Yes

Repair or replace the malfunctioning part according to the inspection results, then go to Step 6.

No

Go to the next step.

4

 PURPOSE: DETERMINE INTEGRITY OF A/F SENSOR

Yes

Replace the A/F sensor, then go to Step 6.

(See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)

No

Go to the next step.

5

 PURPOSE: DETERMINE INTEGRITY OF A/F SENSOR HEATER

Yes

Replace the A/F sensor, then go to the next step.

(See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)

No

Go to the next step.

6

 PURPOSE: VERIFICATION OF VEHICLE REPAIR COMPLETION

Yes

Repeat the inspection from Step 1.

Go to the next step.

No

DTC troubleshooting completed.
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Free to use workshop manual for your 2015+ Mk4 'ND' Mazda MX-5

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