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DTC P0442:00, P0455:00, P0456:00 [PCM (SKYACTIV-G 2.0)]

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2016 – MX-5 – Engine

DTC P0442:00, P0455:00, P0456:00 [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

P0442:00

  • Evaporative gas leakage (leakage amount: low)

P0455:00

  • Evaporative gas leakage (leakage amount: large)

P0456:00

  • Evaporative gas leakage (leakage amount: extremely low)

DETECTION CONDITION

Determination conditions

P0442:00

  • Hole of 0.04 in (1.0 mm) or more in evaporative gas passage

P0455:00

  • Hole of 0.09 in (2.25 mm) or more in evaporative gas passage

P0456:00

  • Hole of 0.02 in (0.5 mm) or more in evaporative gas passage

Preconditions

P0442:00, P0455:00

  • Period ignition is switched off before engine starts: 120 min or more

  • Engine coolant temperature at engine start: 2—43 °C {36—109 °F}*1

  • Time elapsed from engine start: 6—90 min

  • Fuel level in fuel tank: 10—90 %*1

  • Desired ambient air temperature: 4.4—43.3 °C {40—109 °F}*1

  • Barometric pressure: 72.23 kPa {0.7365 kgf/cm2, 10.48 psi} or more*1

  • Charging efficiency: 3—65 %*1

  • Vehicle speed: 64—144 km/h {40.0—89.4 mph}*1

P0456:00

  • Engine coolant temperature at engine start: 2—43 °C {36—109 °F}*1

  • Intake air temperature at engine start: 7 °C {13 °F} or more higher than engine coolant temperature at engine start*1

  • Time elapsed from engine start: 15—90 min

  • Fuel level in fuel tank: 10—90 %*1

  • Desired ambient air temperature: 5—37 °C {41—98 °F}*1

  • Barometric pressure: 72.35 kPa {0.7378 kgf/cm2, 10.49 psi} or more*1

  • Battery voltage: above 10 V*1

  • The following DTCs are not detected:

    • Fuel tank pressure sensor: P0451:00, P0452:00, P0453:00

    • Purge solenoid valve: P0443:00

    • CV solenoid valve: P0446:00

    • EVAP monitor: P0442:00, P0455:00, P0457:00, P144A:00, P1450:00

    • Fuel gauge sender unit: P0460:00, P0461:00, P0462:00, P0463:00

  • *1: Value can be verified by displaying PIDs using M-MDS

Malfunction determination period

  • 75 s period

Drive cycle

  • 1

Self test type

  • CMDTC self test

Sensor used

  • Fuel tank pressure sensor

FAIL-SAFE FUNCTION

  • Not applicable

VEHICLE STATUS WHEN DTCs ARE OUTPUT

  • Illuminates check engine light.

  • Heating is ineffective after engine is started

POSSIBLE CAUSE

  • Missing or loose fuel filler cap

  • Fuel filler cap malfunction

  • Fuel tank pressure sensor malfunction

  • CV solenoid valve malfunction

  • Purge solenoid valve malfunction

  • Evaporative gas passage malfunction

    • Improper connection of evaporative hose

    • Evaporative hose damaged

  • Charcoal canister malfunction

  • Catch tank malfunction

  • Evaporative gas hose passage restriction

    • Pressure control valve malfunction

  • Fuel pump unit loose

  • Fuel tank malfunction

  • PCM malfunction

System Wiring Diagram

  • Not applicable

Function Explanation (DTC Detection Outline)

  • The pressure change of the evaporative gas passage is measured using barometric pressure and intake manifold vacuum to detect evaporative gas leakage. The PCM introduces barometric pressure or intake manifold vacuum into the evaporative gas passage by opening/closing the purge solenoid valve and CV solenoid valve, and measures the pressure change using the fuel tank pressure sensor.

    P0455:00

  • The PCM closes the CV solenoid valve while the vehicle is being driven, and seals the fuel tank. The PCM introduces intake manifold vacuum into the fuel tank and measures the pressure change of the fuel tank using the fuel tank pressure sensor by opening the purge solenoid valve after sealing the fuel tank. If the pressure of the fuel tank does not reach the target value after the specified time has elapsed since the pressure was measured, the PCM determines that there is an evaporative gas leakage. If the PCM determines that refueling is not performed before the engine starts according to the result of the refuel determination, DTC P0455:00 is stored (if the PCM determines that refueling is performed, DTC P0457:00 is stored).

  • If the fuel tank level increases after the engine starts, the PCM determines that refueling was performed by comparing the fuel tank level before one drive cycle with the fuel tank level after engine start.

    P0442:00

  • The PCM closes the purge solenoid valve after diagnosing (normal) DTC P0455:00, and seals the fuel tank. The pressure change of the fuel tank is measured by the fuel tank pressure sensor after the fuel tank is sealed. The PCM determines a temporary malfunction if the pressure change is the specified value or more after the specified time has elapsed since the pressure was measured. If the CV solenoid valve is open after determining a temporary malfunction and the pressure change (increase) of the fuel tank is the specified value or less, the PCM determines that there is an evaporative gas leakage and a DTC is stored.

    P0456:00

  • After the engine stops with the preconditions met, the PCM closes the CV solenoid valve and seals the fuel tank. The pressure change of the fuel tank is measured by the fuel tank pressure sensor after the fuel tank is sealed. The PCM determines a temporary malfunction when the pressure change is the specified value or less after the specified time has elapsed since the pressure was measured. If the CV solenoid valve is open after determining a temporary malfunction and the pressure change of the fuel tank is the specified value or less, the PCM determines that there is an evaporative gas leakage and a DTC is stored.

Repeatability Verification Procedure

    P0442:00, P0455:00

  • Set the remaining fuel quantity in the fuel tank between 30—85 %.

  • Start the engine and switch the ignition off after 5 s have elapsed.

  • Leave the vehicle for 6 hours or more.

  • Start the engine and leave it idling for 2 min.

  • Drive the vehicle for 30 min at a speed of 50 km/h {31 mph} or more (to increase temperature in fuel tank and generate evaporative gas).

    NOTE:

    • If driving the vehicle for 30 min at a speed of 50 km/h {31 mph} or more is not feasible, the vehicle can be driven for a continuous 15 min or more with the engine coolant temperature at 80 °C {176 °F} or more.

    P0456:00

  • Set the remaining fuel quantity in the fuel tank between 30—85 %.

  • Verify that OBD-II information (such as FREEZE FRAME DATA) has been obtained and recorded.

  • Clear the DTC from the PCM memory using the M-MDS. (See CLEARING DTC [PCM (SKYACTIV-G 2.0)].)

  • Start the engine and switch the ignition off after 5 s have elapsed.

  • Leave the vehicle for 6 hours or more.

  • Start the engine and leave it idling for 2 min.

  • Drive the vehicle for 30 min at a speed of 50 km/h {31 mph} or more (to increase temperature in fuel tank and generate evaporative gas).

    NOTE:

    • If driving the vehicle for 30 min at a speed of 50 km/h {31 mph} or more is not feasible, the vehicle can be driven for a continuous 15 min or more with the engine coolant temperature at 80 °C {176 °F} or more.

  • Stop the engine.

  • Leave the vehicle for 1 hours or more.

PID Item/Simulation Item Used In Diagnosis

PID/DATA monitor item table

Item

Definition

Unit

Condition/Specification

BARO

Actually measured barometric pressure input from BARO sensor built into PCM

KPa , mBar , psi, in H20

  • Displays BARO

EVAPCP

Purge solenoid valve control duty value

%

  • Idle (after warm up): Approx. 0% (ECT is 94 °C {201 °F})

  • Racing (Engine speed 2,000 rpm): 0% (ECT is 94 °C {201 °F})

  • Racing (Engine speed 4,000 rpm): Approx. 10.1% (ECT is 94 °C {201 °F})

EVAPCV

CV solenoid valve operation status

Off/On

  • Simulation item (EVAPCV) is ON: On

FCL

Check fuel cap warning light illumination status

Off/On

  • Check fuel cap warning light not illuminated: Off

  • Check fuel cap warning light illuminated: On

FTP

Fuel tank pressure

KPa , mBar , psi, in H20

  • Displays fuel tank pressure

Fuel tank pressure sensor voltage

V

  • Fuel tank pressure is equal to barometric pressure: Approx. 2.6 V

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: 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 (EVAP system related) on the repair order.

—

Go to the next step.

3

 PURPOSE: VERIFY IF DIAGNOSTIC RESULT IS AFFECTED BY MALFUNCTION OF CONTROL PART REQUIRED FOR DIAGNOSIS

Yes

Go to the applicable PENDING CODE or DTC inspection.

(See DTC P0443:00 [PCM (SKYACTIV-G 2.0)].)

(See DTC P0446:00 [PCM (SKYACTIV-G 2.0)].)

(See DTC P0451:00 [PCM (SKYACTIV-G 2.0)].)

(See DTC P0452:00 [PCM (SKYACTIV-G 2.0)].)

(See DTC P0453:00 [PCM (SKYACTIV-G 2.0)].)

No

P0442:00 or P0455:00 is diagnosed:

  • Go to the next step.

P0456:00 is diagnosed:

  • Go to Step 5.

4

 PURPOSE: INSPECTION OF EVAPORATIVE GAS LEAKAGE

Yes

Go to Step 6.

No

Go to Step 9.

5

 PURPOSE: INSPECTION OF EVAPORATIVE GAS LEAKAGE

  • Perform the smoke test using the tester (134-01049).

  • Is evaporative gas leakage detected?

Yes

Go to the next step.

No

Go to Step 9.

6

 PURPOSE: VERIFY FUEL FILLER CAP MALFUNCTION

Yes

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

No

Go to the next step.

7

 PURPOSE: SPECIFY LOCATION OF EVAPORATIVE GAS LEAKAGE (FUEL TANK SIDE)

Yes

Go to the next step.

No

Go to the troubleshooting procedure to perform the procedure from Step 3.

8

 PURPOSE: SPECIFY LOCATION OF EVAPORATIVE GAS LEAKAGE (CHARCOAL CANISTER SIDE)

Yes

Go to the next step.

No

Go to the troubleshooting procedure to perform the procedure from Step 7.

9

 PURPOSE: DETERMINE IF MALFUNCTION CAUSED BY CONTROL PART (PURGE SOLENOID VALVE) REQUIRED FOR DIAGNOSIS

Yes

Go to the next step.

No

Go to the troubleshooting procedure to perform the procedure from Step 10.

10

 PURPOSE: DETERMINE IF MALFUNCTION CAUSED BY CONTROL PART (CV SOLENOID VALVE) REQUIRED FOR DIAGNOSIS

Yes

Go to the next step.

No

Go to the troubleshooting procedure to perform the procedure from Step 11.

11

 PURPOSE: DETERMINE IF MALFUNCTION CAUSED BY CONTROL PART (FUEL TANK PRESSURE SENSOR) REQUIRED FOR DIAGNOSIS

Yes

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

No

Go to the troubleshooting procedure to perform the procedure from Step 12.

Troubleshooting Diagnostic Procedure

    Intention of troubleshooting procedure

  • Step 1—2

    • Inspect for evaporative gas leakage from the fuel-filler opening.

  • Step 3—6

    • Inspect for evaporative gas leakage from the fuel tank side.

  • Step 7—9

    • Inspect for evaporative gas leakage from the charcoal canister side.

  • Step 10—12

    • Inspect control parts for normal operation.

  • Step 13—14

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

STEP

INSPECTION

RESULTS

ACTION

1

 PURPOSE: INSPECTION OF EVAPORATIVE GAS LEAKAGE FROM FUEL-FILLER CAP

  • Verify that the fuel-filler cap is completely closed.

  • Is the fuel-filler cap completely closed?

Yes

Go to the next step.

No

Close the fuel-filler cap completely, then go to Step 13.

2

 PURPOSE: DETERMINE INTEGRITY OF FUEL FILLER CAP

  • Inspect the fuel filler cap.

  • Is there any malfunction?

Yes

Replace the fuel filler cap, then go to Step 13.

(See FUEL-FILLER PIPE REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)

No

Go to the next step.

3

 PURPOSE: INSPECTION OF EVAPORATIVE GAS LEAKAGE FROM EVAPORATIVE GAS PASSAGE

  • Verify the hoses between the following parts, pipe connection condition, and that there is no cracking or damage.

    • Between fuel tank and pressure control valve

    • Between pressure control valve and charcoal canister

  • Is there any malfunction?

Yes

Repair or replace the malfunctioning part according to the inspection results, then go to Step 13.

No

Go to the next step.

4

 PURPOSE: DETERMINE INTEGRITY OF PRESSURE CONTROL VALVE

Yes

Replace the pressure control valve, then go to Step 13.

(See FUEL TANK REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)

No

Go to the next step.

5

 PURPOSE: INSPECTION OF EVAPORATIVE GAS LEAKAGE CAUSED BY POOR INSTALLATION OF FUEL PUMP

Yes

Go to the next step.

No

Retighten the fuel pump unit, then go to Step 13.

(See FUEL PUMP UNIT REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)

6

 PURPOSE: DETERMINE INTEGRITY OF FUEL TANK

Yes

Replace the fuel tank, then go to Step 13.

(See FUEL TANK REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)

No

Go to the next step.

7

 PURPOSE: INSPECTION OF EVAPORATIVE GAS LEAKAGE FROM EVAPORATIVE GAS PASSAGE

  • Verify the hoses between the following parts, pipe connection condition, and that there is no cracking or damage.

    • Between charcoal canister and catch tank

    • Between charcoal canister and CV solenoid valve

    • Between catch tank and purge solenoid valve

    • Between purge solenoid valve and intake manifold

  • Is there any malfunction?

Yes

Repair or replace the malfunctioning part according to the inspection results, then go to Step 13.

No

Go to the next step.

8

 PURPOSE: DETERMINE INTEGRITY OF CHARCOAL CANISTER

Yes

Replace the charcoal canister, then go to Step 13.

(See CHARCOAL CANISTER REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)

No

Go to the next step.

9

 PURPOSE: DETERMINE INTEGRITY OF CATCH TANK

Yes

Replace the catch tank, then go to Step 13.

(See PURGE SOLENOID VALVE REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)

No

Go to the next step.

10

 PURPOSE: DETERMINE INTEGRITY OF PURGE SOLENOID VALVE

Yes

Replace the purge solenoid valve, then go to Step 13.

(See PURGE SOLENOID VALVE REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)

No

Go to the next step.

11

 PURPOSE: DETERMINE INTEGRITY OF CV SOLENOID VALVE

Yes

Replace the CV solenoid valve, then go to Step 13.

(See CANISTER VENT (CV) SOLENOID VALVE REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)

No

Go to the next step.

12

 PURPOSE: DETERMINE INTEGRITY OF FUEL TANK PRESSURE SENSOR

Yes

Replace the charcoal canister, then go to the next step.

(See CHARCOAL CANISTER REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)

No

Go to the next step.

13

 PURPOSE: VERIFICATION OF VEHICLE REPAIR COMPLETION

Yes

Repeat the inspection from Step 1 of the troubleshooting diagnostic procedure.

Go to the next step.

No

Go to the next step.

14

 PURPOSE: VERIFY IF THERE IS ANY OTHER MALFUNCTION

  • Is any other DTC or pending code stored?

Yes

Go to the applicable DTC inspection.

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

No

DTC troubleshooting completed.

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