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Home >> Mazda >> 2021 >> CX-30 Turbo Premium >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 3 (On-Board Diagnostics - Automatic Transaxle (ET6A-El, ET6AX-El)) >> DTC P0842-00: Oil Pressure Switch No. (Oil Pressure Switch B) Stuck On >> Diagnostic procedure

Diagnostic procedure

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DTC P0842:00 (TCM, ET6A-EL, ET6AX-EL, US) DIAGNOSTIC PROCEDURE

Step Inspection Results Action
1 VERIFY DTC OUTPUT STATUS
  • Is the DTC P1738:00 also present?
 Yes Go to the applicable DTC inspection.
(See DTC P1738-00: .)
No Go to the next step.
2 RECORD VEHICLE STATUS WHEN DTC WAS DETECTED TO UTILIZE WITH REPEATABILITY VERIFICATION
  • Record the freeze frame data/snapshot data.
NOTE:
  • Recording can be facilitated using the screen capture of the PC function.
 - Go to the next step.
3 VERIFY RELATED REPAIR INFORMATION OR SERVICE INFORMATION AVAILABILITY
  • Verify related Service Bulletins, on-line repair information, or Service Information availability.
  • Is any related information available?
 Yes Perform repair or diagnosis according to the available information.
  • If the vehicle is not repaired, go to the next step.
No Go to the next step.
4 PERFORM ON-BOARD DIAGNOSTIC TEST
  • Perform the following procedure to ensure that the DTC has been resolved:
    1. Start the engine.
    2. Verify that the ATF temperature is 55 °C {131 °F} or more.
  • Perform the on-board diagnostic test. (See ON-BOARD DIAGNOSTIC TEST MODE [TCM (ET6A-EL, ET6AX-EL)] .)
  • Is the DTC P0842:00 present?
 Yes Replace the oil pressure switch B, then go to repair completion verification.
(See OIL PRESSURE SWITCH REMOVAL/INSTALLATION [ET6A-EL, ET6AX-EL (US)] .)
No No DTCs are displayed:
  • Drive the vehicle to check it, and if there is no problem then the DTC troubleshooting is complete.

    If a DTC other than the one indicated on the left is displayed:

  • Go to the applicable DTC inspection.

(See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [TCM (ET6A-EL, ET6AX-EL) (US)] .)
Repair completion verification RE-PERFORM ON-BOARD DIAGNOSTIC TEST
  • Perform the following procedure to ensure that the DTC has been resolved:
    1. Start the engine.
    2. Verify that the ATF temperature is 55 °C {131 °F} or more.
  • Perform the on-board diagnostic test. (See ON-BOARD DIAGNOSTIC TEST MODE [TCM (ET6A-EL, ET6AX-EL)] .)
  • Are any DTCs present?
 Yes Repair the malfunctioning location according to the applicable DTC troubleshooting.
(See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [TCM (ET6A-EL, ET6AX-EL) (US)] .)
No DTC troubleshooting completed.
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