Mazda 6. Manual - part 136

F–66

ON-BOARD DIAGNOSTIC 

DTC CONFIRMATION PROCEDURE

A6E397018881W11

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KOEO/KOER SELF-TEST

A6E397018881W12

1. Connect WDS or equivalent to the vehicle DLC-2 

16-pin connector located as shown in the figure.

2. Perform KOEO/KOER self-test.

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AFTER REPAIR PROCEDURE

A6E397018881W13

1. Connect WDS or equivalent to the vehicle DLC-2 

16-pin connector located as shown in the figure.

2. Turn the ignition key from OFF to ON.
3. Record DTC if retrieved.
4. Erase all diagnostic data by WDS or equivalent.

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STEP

INSPECTION

ACTION

1

RECORD CONTINUOUS MEMORY DTC AND 
FREEZE FRAME DATA

• Turn ignition key to ON (Engine OFF).

• Connect WDS or equivalent to DLC.

• Retrieve all stored DTCs.

• Are there any DTCs present?

Yes Record all stored DTCs (Continuous Memory DTC) and 

Freeze Frame Data on repair order, then go to next step.

No

Go to next step.

2

VERIFY RELATED REPAIR INFORMATION

• Check for related Service information 

availability.

• Is any related repair information available?

Yes Perform repair or diagnosis according to available Service 

information.

• If vehicle is not repaired, go to next step.

No

Go to next step.

3

PERFORM KEY ON ENGINE OFF (KOEO) 
SELF-TEST

• Start engine.

• Warm up engine completely.

• Turn off all electrical loads.

• Perform KOEO SELF-TEST PROCEDURE.

(See 

F–66 KOEO/KOER SELF-TEST

) 

• Are there any KOEO DTCs present?

Yes Repair KOEO DTC.

(See 

F–67 DTC TABLE

)

No

Go to next step.

4

PERFORM KEY ON ENGINE RUNNING (KOER) 
SELF-TEST

• Start engine.

• Perform KOER SELF-TEST PROCEDURE.

(See 

F–66 KOEO/KOER SELF-TEST

) 

• Are there any KOER DTCs present?

Yes Repair KOER DTC.

(See 

F–67 DTC TABLE

No

• If Continuous Memory DTC is present at Step 1, return 

to applicable DTC troubleshooting procedure step.

• If Continuous Memory DTC is not present at Step 1, go 

to symptom troubleshooting.

DLC-2

A6E3970W002

DLC-2

A6E3970W002

ON-BOARD DIAGNOSTIC 

F–67

F

DTC TABLE

A6E397018881W14

DTC table

×: Applicable

—: Not applicable

DTC No.

Condition

MIL

DC

Monitor item

Memory 

function

Page

P0010

CMP actuator circuit 
malfunction

ON

1

CCM

×

(See 

F–70 DTC P0010

)

P0011

CMP timing over-advanced

ON

1

CCM

×

(See 

F–72 DTC P0011

)

P0012

CMP timing over-retarded

ON

1

CCM

×

(See 

F–73 DTC P0012

)

P0031

Front HO2S heater circuit low 
input

ON

2

O

2

 sensor heater

×

(See 

F–74 DTC P0031

)

P0032

Front HO2S heater circuit high 
input

ON

2

O

2

 sensor heater

×

(See 

F–76 DTC P0032

)

P0037

Rear HO2S heater circuit low 
input

ON

2

O

2

 sensor heater

×

(See 

F–78 DTC P0037

)

P0038

Rear HO2S heater circuit high 
input

ON

2

O

2

 sensor heater

×

(See 

F–80 DTC P0038

)

P0101

MAF sensor inconsistent with 
TP sensor

ON

2

CCM

×

(See 

F–81 DTC P0101

)

P0102

MAF circuit low input

ON

1

CCM

×

(See 

F–83 DTC P0102

)

P0103

MAF circuit high input

ON

1

CCM

×

(See 

F–85 DTC P0103

)

P0107

MAP sensor circuit low input

ON

1

CCM

×

(See 

F–86 DTC P0107

)

P0108

MAP sensor circuit high input

ON

1

CCM

×

(See 

F–88 DTC P0108

)

P0111

IAT circuit performance problem

ON

2

CCM

×

(See 

F–90 DTC P0111

)

P0112

IAT circuit low input

ON

1

CCM

×

(See 

F–91 DTC P0112

)

P0113

IAT circuit high input

ON

1

CCM

×

(See 

F–92 DTC P0113

)

P0117

ECT circuit low input

ON

1

CCM

×

(See 

F–94 DTC P0117

)

P0118

ECT circuit high input

ON

1

CCM

×

(See 

F–96 DTC P0118

)

P0121

TP stuck closed

ON

2

CCM

×

(See 

F–98 DTC P0121

)

P0122

TP circuit low input

ON

1

CCM

×

(See 

F–100 DTC P0122

)

P0123

TP circuit high input

ON

1

CCM

×

(See 

F–102 DTC P0123

)

P0125

Excessive time to enter closed 
loop fuel control

ON

2

CCM

×

(See 

F–104 DTC P0125

)

P0131

Front HO2S no inversion (stuck 
low)

ON

2

CCM

×

(See 

F–105 DTC P0131, 

P0132

)

P0132

Front HO2S no inversion (stuck 
high)

ON

2

CCM

×

(See 

F–105 DTC P0131, 

P0132

)

P0133

Front HO2S circuit malfunction

ON

2

O

2

 sensor

×

(See 

F–108 DTC P0133

)

P0134

Front HO2S circuit no activity 
detected

ON

2

CCM

×

(See 

F–110 DTC P0134

)

P0138

Rear HO2S circuit high input

ON

2

CCM

×

(See 

F–112 DTC P0138

)

P0140

Rear HO2S circuit no activity 
detected

ON

2

CCM

×

(See 

F–114 DTC P0140

)

P0171

Fuel trim system too lean

ON

2

Fuel

×

(See 

F–116 DTC P0171

)

P0172

Fuel trim system too rich

ON

2

Fuel

×

(See 

F–119 DTC P0172

)

P0300

Random misfire detected

Flash / ON

1 or 2

Misfire

×

(See 

F–121 DTC P0300

)

P0301

Cylinder No.1 misfire detected

Flash / ON

1 or 2

Misfire

×

(See 

F–124 DTC P0301, 

P0302, P0303, P0304

)

P0302

Cylinder No.2 misfire detected

Flash / ON

1 or 2

Misfire

×

P0303

Cylinder No.3 misfire detected

Flash / ON

1 or 2

Misfire

×

P0304

Cylinder No.4 misfire detected

Flash / ON

1 or 2

Misfire

×

P0327

Knock sensor circuit low input

ON

1

CCM

×

(See 

F–126 DTC P0327

)

P0328

Knock sensor circuit high input

ON

1

CCM

×

(See 

F–128 DTC P0328

)

P0335

CKP sensor circuit malfunction

ON

1

CCM

×

(See 

F–130 DTC P0335

)

P0340

CMP sensor circuit malfunction

ON

1

CCM

×

(See 

F–132 DTC P0340

)

P0403

EGR valve motor coils open or 
short

ON

2

CCM

×

(See 

F–134 DTC P0403

)

P0420

Catalyst system efficiency 
below threshold

ON

2

Catalyst

×

(See 

F–137 DTC P0420

)

F–68

ON-BOARD DIAGNOSTIC 

P0443

Evaporative emission control 
system purge control valve 
circuit malfunction

ON

2

CCM

×

(See 

F–138 DTC P0443

)

P0480

Fan relay control circuit 
malfunction

OFF

2

Other

×

(See 

F–140 DTC P0480

)

P0500

Vehicle speed sensor (VSS) 
circuit malfunction (MTX)

ON

2

CCM

×

(See 

F–142 DTC P0500

)

Vehicle speed sensor (VSS) 
circuit malfunction (ATX)

(See 

K–53 DTC TABLE

)

P0505

Idle control system malfunction

OFF

—

Other

—

(See 

F–144 DTC P0505

)

P0506

Idle control system RPM lower 
than expected

ON

2

CCM

×

(See 

F–145 DTC P0506

)

P0507

Idle control system RPM higher 
than expected

ON

2

CCM

×

(See 

F–147 DTC P0507

)

P0511

Idle control system circuit 
malfunction

ON

1

CCM

×

(See 

F–148 DTC P0511

)

P0550

PSP switch circuit malfunction

ON

2

CCM

×

(See 

F–150 DTC P0550

)

P0602

PCM programming error

ON

1

CCM

×

(See 

F–152 DTC P0602

)

P0610

Control module vehicle options 
error

ON

1

CCM

×

(See 

F–152 DTC P0610

)

P0661

VIS control circuit low input

OFF

2

Other

×

(See 

F–153 DTC P0661

)

P0662

VIS control circuit high input

OFF

2

Other

×

(See 

F–154 DTC P0662

)

P0703

Brake switch input malfunction

ON

2

CCM

×

(See 

F–156 DTC P0703

)

P0704

Clutch switch input malfunction

ON

2

CCM

×

(See 

F–158 DTC P0704

)

P0706

Transaxle range (TR) switch 
circuit range/performance

(See 

K–53 DTC TABLE

)

P0707

Transaxle range (TR) switch 
circuit low input

(See 

K–53 DTC TABLE

)

P0708

Transaxle range (TR) switch 
circuit high input

(See 

K–53 DTC TABLE

)

P0711

Transaxle fluid temperature 
(TFT) sensor circuit range/
performance (Stuck)

(See 

K–53 DTC TABLE

)

P0712

Transaxle fluid temperature 
(TFT) sensor circuit malfunction 
(short to ground)

(See 

K–53 DTC TABLE

)

P0713

Transaxle fluid temperature 
(TFT) sensor circuit malfunction 
(open circuit)

(See 

K–53 DTC TABLE

)

P0715

Input/turbine speed sensor 
circuit malfunction

(See 

K–53 DTC TABLE

)

P0731

Gear 1 incorrect (Incorrect Gear 
Ratio Detected)

(See 

K–53 DTC TABLE

)

P0732

Gear 2 incorrect (Incorrect Gear 
Ratio Detected)

(See 

K–53 DTC TABLE

)

P0733

Gear 3 incorrect (Incorrect Gear 
Ratio Detected)

(See 

K–53 DTC TABLE

)

P0734

Gear 4 incorrect (Incorrect Gear 
Ratio Detected)

(See 

K–53 DTC TABLE

)

P0741

Torque converter clutch (TCC) 
(stuck OFF) 

(See 

K–53 DTC TABLE

)

P0742

Torque converter clutch (TCC) 
(stuck ON)

(See 

K–53 DTC TABLE

)

P0745

Pressure control solenoid 
malfunction

(See 

K–53 DTC TABLE

)

P0751

Shift solenoid A stuck OFF

(See 

K–53 DTC TABLE

)

P0752

Shift solenoid A stuck ON

(See 

K–53 DTC TABLE

)

P0753

Shift solenoid A malfunction 
(electrical)

(See 

K–53 DTC TABLE

)

P0756

Shift solenoid B stuck OFF

(See 

K–53 DTC TABLE

)

DTC No.

Condition

MIL

DC

Monitor item

Memory 

function

Page

ON-BOARD DIAGNOSTIC 

F–69

F

End Of Sie

P0757

Shift solenoid B stuck ON

(See 

K–53 DTC TABLE

)

P0758

Shift solenoid B malfunction 
(electrical)

(See 

K–53 DTC TABLE

)

P0761

Shift solenoid C stuck OFF

(See 

K–53 DTC TABLE

)

P0762

Shift solenoid C stuck ON

(See 

K–53 DTC TABLE

)

P0763

Shift solenoid C malfunction 
(electrical)

(See 

K–53 DTC TABLE

)

P0766

Shift solenoid D stuck OFF

(See 

K–53 DTC TABLE

)

P0767

Shift solenoid D stuck ON

(See 

K–53 DTC TABLE

)

P0768

Shift solenoid D malfunction 
(electrical)

(See 

K–53 DTC TABLE

)

P0771

Shift solenoid E stuck OFF

(See 

K–53 DTC TABLE

)

P0772

Shift solenoid E stuck ON

(See 

K–53 DTC TABLE

)

P0773

Shift solenoid E malfunction 
(electrical)

(See 

K–53 DTC TABLE

)

P0841

Oil pressure switch circuit 
malfunction

(See 

K–53 DTC TABLE

)

P0850

Neutral switch input malfunction

ON

2

CCM

×

(See 

F–160 DTC P0850

)

P1410

Variable air duct valve circuit 
malfunction

OFF

2

Other

×

(See 

F–162 DTC P1410

)

P1562

PCM +BB voltage low

ON

1

CCM

×

(See 

F–164 DTC P1562

)

P2006

Variable tumble control system 
shutter valve stuck closed

ON

2

CCM

×

(See 

F–166 DTC P2006

)

P2009

Variable tumble control solenoid 
valve circuit low input

ON

2

CCM

×

(See 

F–168 DTC P2009

)

P2010

Variable tumble control solenoid 
valve circuit high input

ON

2

CCM

×

(See 

F–170 DTC P2010

)

P2228

BARO sensor circuit low input

ON

1

CCM

×

(See 

F–172 DTC P2228

)

P2229

BARO sensor circuit high input

ON

1

CCM

×

(See 

F–174 DTC P2229

)

P2502

Generator output voltage signal 
no electricity

OFF

1

Other

—

(See 

F–176 DTC P2502

)

P2503

Battery overcharge

OFF

1

Other

—

(See 

F–177 DTC P2503

)

P2504

Generator terminal B circuit 
open

OFF

1

Other

—

(See 

F–178 DTC P2504

)

U0073

CAN bus off

OFF

1

Other

—

(See 

T–140–1 

MULTIPLEX 
COMMUNICATION 
SYSTEM

)

U0121

PCM cannot receive any 
signals from ABS, ABS/TCS or 
DSC HU/CM

ON

1

Other

×

(See 

T–140–1 

MULTIPLEX 
COMMUNICATION 
SYSTEM

)

U0155

PCM cannot receive any 
signals from combination meter

ON

1

Other

×

(See 

T–140–1 

MULTIPLEX 
COMMUNICATION 
SYSTEM

)

DTC No.

Condition

MIL

DC

Monitor item

Memory 

function

Page