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Drew
Drew, Super Mazda Tech
Category: Car
Satisfied Customers: 2518
Experience:  17 yrs. experience as a shop owner. ASE L1 Advanced Certified Master Tech., Mazda Certified with Ford, Linc. & Merc. experience.
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Bought this 2006 MAZDA 3, 2.3L as a used vehicle from a private

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Bought this 2006 MAZDA 3, 2.3L as a used vehicle from a private party 6 mos. ago. Apparently, the check engine light bulb had been disconnected and upon having a state inspection, we were alerted to the multiple OBDII trouble codes: P0128, P0442, P0455, P2187, P0043, P0771. The transmission just started acting up prior to inspection. is the P0771 the internal sensor? Also, any info on what to change for the other codes would be great.
Hello. My name is XXXXX XXXXX I will be glad to assist you.

P0128= faulty thermostat.
P0442, P2187 and P0455 are a leak in the EVAP system, normally a gas cap or EVAP purge valve stuck open.
P0043 is probably a faulty rear oxygen sensor.

P0771 is a problem with shift solenoid E. Below is the diagnosis test for this fault code.

It may be a faulty shift solenoid inside the transmission valve body which can be replaced separately if needed.

Thanks
Drew

2006 - Mazda3 - Workshop Manual - Transmission/Transaxle

DTC P0771 [FN4A-EL]


DTC P0771

Shift solenoid E stuck off

DETECTION CONDITION

  • When any of P0732, and P0734 are not output, and all conditions below are satisfied.

    • When all conditions below are satisfied while driving in 1GR

      • ATF temperature 20 °C {68 °F} or more

      • Driving in M range

      • Engine running

      • Turbine speed within 225—4,987 rpm

      • Accelerator opening angle (APP PID) 3.07% or more

      • Differential gear case (output) revolution speed 35 rpm or more

      • Revolution ratio of forward clutch drum revolution to differential gear case revolution less than 2.16

      • None of the following DTCs are present: P0706, P0707, P0708, P0712, P0713, P0715, P0720, P0751, P0752, P0753, P0756, P0757, P0758, P0761, P0762, P0763, P0766, P0767, P0767, P0768, P0771, P0772, P0773

    • When all conditions below are satisfied while driving in 4GR

      • ATF temperature 20 °C {68 °F} or more

      • Driving in D range

      • Engine running

      • Turbine speed within 225—4,987 rpm

      • Vehicle speed within 60—100 km/h {37—62 mph}

      • Torque converter clutch (TCC) operating

      • Shift solenoid A duty value exceeds 99%

      • Difference between engine speed and turbine speed more than 100 rpm

      • None of the following DTCs are present: P0706, P0707, P0708, P0712, P0713, P0715, P0720, P0751, P0752, P0753, P0756, P0757, P0758, P0761, P0762, P0763, P0766, P0767, P0767, P0768, P0771, P0772, P0773

    Diagnostic support note:
  • This is a continuous monitor (CCM).

  • 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.

  • The PENDING CODE is available if the PCM detects the above malfunction condition during the first drive cycle.

  • FREEZE FRAME DATA is available.

  • The AT warning light illuminates.

  • The DTC is stored in the PCM memory.

POSSIBLE CAUSE

  • ATF level low

  • Deteriorated ATF

  • Shift solenoid E stuck

  • Control valve stuck

  • PCM malfunction


Diagnostic procedure


STEP

INSPECTION

ACTION

1

VERIFY FREEZE FRAME DATA HAS BEEN RECORDED

  • Has the 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 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.

3

INSPECT ATF CONDITION

  • Turn the ignition switch to the LOCK position.

  • Inspect the ATF condition.

    • Clear red: Normal

    • Milky: Water mixed in fluid

    • Reddish brown: Deteriorated ATF

  • Is it normal?

     

Yes

Go to the next step.

No

If the ATF color is milky or reddish brown, replace ATF, then go to Step 5.

 

4

INSPECT ATF LEVEL

  • Start the engine.

  • Warm up the ATX.

  • Is the ATF level within the specification?

     

Yes

Go to the next step.

No

Add ATF to the specified level, then go to Step 7.

 

5

INSPECT LINE PRESSURE

  • Start the engine.

  • Measure the line pressures.

     

  • Are the line pressures within the specifications?

Yes

Go to the next step.

No

  • All ranges: Replace the oil pump or control valve body, then go to Step 7.

  • Any ranges: Replace the ATX, then go to Step 7.

     

    (See ATX Workshop Manual FN4A-EL (9999-95-FN4A-04).)

6

INSPECT OPERATION OF EACH VALVE AND EACH SPRING

  • Turn the ignition switch to the LOCK position.

  • Remove the control valve body.

  • Disassemble the control valve body.

  • Is each valve operation normal and is the return spring normal?


    (See ATX Workshop Manual FN4A-EL (9999-95-FN4A-04).)

Yes

Replace the ATX, then go to the next step.

 

(See ATX Workshop Manual FN4A-EL (9999-95-FN4A-04).)

No

Repair or replace the shift valve and return spring, then go to the next step.

 

(See ATX Workshop Manual FN4A-EL (9999-95-FN4A-04).)

7

VERIFY TROUBLESHOOTING OF DTC P0771 COMPLETED

  • Make sure to reconnect all the disconnected connectors.

  • Clear the DTC from the memory using the WDS or equivalent.

  • Start the engine.

  • Warm up the ATX.

  • Drive the vehicle under the following conditions and make sure that gears shift smoothly from 1GR to 4GR.

    • ATF temperature: 20 °C {68 °F} or more

    • Drive in the M range

    • Vehicle speed: within 60—100 km/h {37—62 mph} (4GR only).

  • Is the PENDING CODE present?

Yes

Replace the PCM, then go to the next step.

 

No

Go to the next step.

8

VERIFY AFTER REPAIR PROCEDURE
  • Perform the “After Repair Procedure”.

     

  • Are any DTCs present?

Yes

Go to the applicable DTC inspection.

 

No

DTC troubleshooting completed.

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