Mitsubishi 380. Manual - part 481

MULTIPOINT FUEL INJECTION (MPI) DIAGNOSIS

MULTIPOINT FUEL INJECTION (MPI)

13A-16

SYSTEM READINESS TEST STATUS

.

PURPOSE

The ENGINE-ECU monitors the following main diag-
nosis items, judges if these items are in good condi-
tion or not, and then stores its history. The history 
can be read out by using MUT III. (if the ECU has 
judged an item before, the MUT III displays "Com-
plete").
In addition, if diagnosis codes are erased or the bat-
tery cable is disconnected, this history will also be 
erased (the memory will be reset)

.

• Catalyst: P0421, P0431

• Heated oxygen sensor: P0130, P0131, P0132, 

P0133, P0134, P0136, P0137, P0138, P0139, 
P0150, P0151, P0152, P0153, P0154, P0156, 
P0157, P0158, P0159

• Heated oxygen sensor heater: P0031, P0032, 

P0037, P0038, P0051, P0052, P0057, P0058.

NOTE: After a repair is made for a DTC, the techni-
cian should drive the EOBD Drive Cycle checking 
that the diagnostic tool  (MUT-III Sub Assembly) dis-
plays all the Readiness Codes as "Complete".

MULTIPOINT FUEL INJECTION (MPI) DIAGNOSIS

MULTIPOINT FUEL INJECTION (MPI)

13A-17

DIAGNOSTIC TROUBLE CODE CHART

M1131151001490

CAUTION

During diagnosis, a DTC code associated with other systems may be set when the ignition switch is 
turned on with connector(s) disconnected. On completion, confirm all systems for DTC(s). If DTC(s) 
are set, erase them all.

NOTE: If the Check Engine Warning Lamp illuminates because of a malfunction of the Engine-ECU, 
DTC - P0606 will be initialised. In this case, the ENGINE - ECU is the most probable cause. Refer to 
DTC-P0606 in table for diagnosis.

DTC

DIAGNOSTIC ITEM

REFERENCE 
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P0031

Heated oxygen sensor heater circuit low ( bank 1 sensor 1)

P.13A-24

P0032

Heated oxygen sensor heater circuit high ( bank 1 sensor 1)

P.13A-34

P0037

Heated oxygen sensor heater circuit low ( bank 1 sensor 2)

P.13A-37

P0038

Heated oxygen sensor heater circuit high ( bank 1 sensor 2)

P.13A-47

P0051

Heated oxygen sensor heater circuit low ( bank 2 sensor 1)

P.13A-50

P0052

Heated oxygen sensor heater circuit high ( bank 2 sensor 1)

P.13A-60

P0057

Heated oxygen sensor heater circuit low ( bank 2 sensor 2)

P.13A-63

P0058

Heated oxygen sensor heater circuit high ( bank 2 sensor 2)

P.13A-73

P0074

Ambient air temperature intermittant

P.13A-76

P0101*

Mass airflow circuit range/performance problem

P.13A-78

P0102*

Mass airflow circuit low input

P.13A-81

P0103*

Mass airflow circuit high input

P.13A-87

P0106

Manifold absolute pressure circuit range/performance problem

P.13A-92

P0107

Manifold absolute pressure circuit low input

P.13A-101

P0108

Manifold absolute pressure circuit high input

P.13A-109

P0112

Intake air temperature circuit low input

P.13A-116

P0113

Intake air temperature circuit high input

P.13A-120

P0116

Engine coolant temperature circuit range/performance problem

P.13A-127

P0117

Engine coolant temperature circuit low input

P.13A-134

P0118

Engine coolant temperature circuit high input

P.13A-139

P0122*

Throttle position sensor (main) circuit low input

P.13A-148

P0123*

Throttle position sensor (main) circuit high input

P.13A-155

P0130

Heated oxygen sensor circuit (bank 1 sensor 1)

P.13A-160

P0131

Heated oxygen sensor circuit low voltage (bank 1 sensor 1)

P.13A-166

P0132

Heated oxygen sensor circuit high voltage (bank 1 sensor 1) 

P.13A-172

P0133

Heated oxygen sensor circuit slow response (bank 1 sensor 1) 

P.13A-177

P0134

Heated oxygen sensor circuit no activity detected (bank 1 sensor 1) 

P.13A-179

P0136

Heated oxygen sensor circuit (bank 1 sensor 2)

P.13A-186

P0137

Heated oxygen sensor circuit low voltage (bank 1 sensor 2) 

P.13A-192

P0138

Heated oxygen sensor circuit high voltage (bank 1 sensor 2) 

P.13A-198

MULTIPOINT FUEL INJECTION (MPI) DIAGNOSIS

MULTIPOINT FUEL INJECTION (MPI)

13A-18

P0139

Heated oxygen sensor circuit slow response (bank 1 sensor 2) 

P.13A-203

P0140

Heated oxygen sensor circuit no activity detected (bank 1 sensor 2) 

P.13A-205

P0150

Heated oxygen sensor circuit (bank 2 sensor 1)

P.13A-212

P0151

Heated oxygen sensor circuit low voltage (bank 2 sensor 1)

P.13A-218

P0152

Heated oxygen sensor circuit high voltage (bank 2 sensor 1)

P.13A-224

P0153

Heated oxygen sensor circuit slow response (bank 2 sensor 1) 

P.13A-229

P0154

Heated oxygen sensor circuit no activity detected (bank 2 sensor 1) 

P.13A-231

P0156

Heated oxygen sensor circuit (bank 2 sensor 2)

P.13A-238

P0157

Heated oxygen sensor circuit low voltage (bank 2 sensor 2)

P.13A-244

P0158

Heated oxygen sensor circuit high voltage (bank 2 sensor 2)

P.13A-250

P0159

Heated oxygen sensor circuit slow response (bank 2 sensor 2) 

P.13A-255

P0160

Heated oxygen sensor circuit no activity detected ( bank 2 sensor 2)

P.13A-257

P0171

System too lean (bank 1)

P.13A-264

P0172

System too rich (bank 1)

P.13A-266

P0174

System too lean (bank 2)

P.13A-268

P0175

System too rich (bank 2)

P.13A-270

P0201

Injector circuit-cylinder 1

P.13A-272

P0202

Injector circuit-cylinder 2

P.13A-280

P0203

Injector circuit-cylinder 3

P.13A-287

P0204

Injector circuit-cylinder 4

P.13A-295

P0205

Injector circuit-cylinder 5

P.13A-302

P0206

Injector circuit-cylinder 6

P.13A-310

P0219

Engine overspeed condition

P.13A-317

P0222*

Throttle position sensor (sub) circuit low input

P.13A-318

P0223*

Throttle position sensor (sub) circuit high input

P.13A-324

P0300

Random/multiple cylinder misfire detected

P.13A-330

P0301

Cylinder 1 misfire detected

P.13A-334

P0302

Cylinder 2 misfire detected

P.13A-336

P0303

Cylinder 3 misfire detected

P.13A-338

P0304

Cylinder 4 misfire detected

P.13A-340

P0305

Cylinder 5 misfire detected

P.13A-342

P0306

Cylinder 6 misfire detected

P.13A-344

P0325

Knock sensor circuit

P.13A-346

P0335*

Crankshaft position sensor circuit

P.13A-354

P0340

Camshaft position sensor circuit

P.13A-372

P0421

Warm up catalyst efficiency below threshold (bank 1) 

P.13A-383

DTC

DIAGNOSTIC ITEM

REFERENCE 
PAGE

MULTIPOINT FUEL INJECTION (MPI) DIAGNOSIS

MULTIPOINT FUEL INJECTION (MPI)

13A-19

P0431

Warm up catalyst efficiency below threshold (bank 2) 

P.13A-385

P0441

Evaporative emission control system incorrect purge flow

P.13A-387

P0443

Evaporative emission control system purge control valve circuit

P.13A-389

P0461

Fuel level sensor (main) circuit range/performance 

P.13A-397

P0500*

Vehicle speed signal

P.13A-399

P0506

Idle control system RPM lower than expected

P.13A-419

P0507

Idle control system RPM higher than expected

P.13A-421

P0513

Immobilizer malfunction

P.13A-423

P0562

Battery voltage too low

P.13A-424

P0563

Battery voltage too high

P.13A-425

P0603*

EEPROM malfunction

P.13A-426

P0606*

Powertrain control module main processor malfunction

P.13A-427

P0630

VIN malfunction

P.13A-428

P0638*

Throttle actuator control motor circuit range/ performance problem

P.13A-430

P0830

Clutch switch - (Refer to Group 17-Auto Cruise Control)

P.17-15

P1564

Auto cruise switch - (Refer to Group 17-Auto Cruise Control)

P.17-19

P1571

Stop lamp switch - (Refer to Group 17-Auto Cruise Control)

P.17-34

P1603

Battery backup line malfunction

P.13A-437

P2096

Post catalyst system too lean 1

P.13A-443

P2097

Post catalyst system too lean 2

P.13A-446

P2098

Post catalyst system too rich 1

P.13A-449

P2099

Post catalyst system too rich 2

P.13A-452

P2100*

Throttle actuator control motor circuit (open)

P.13A-455

P2101*

Throttle actuator control motor magneto malfunction

P.13A-461

P2102*

ETV motor circuit (shorted low)

P.13A-466

P2103*

ETV motor circuit (shorted high)

P.13A-471

P2122*

Accelerator pedal position sensor (main) circuit low input

P.13A-476

P2123*

Accelerator pedal position sensor (main) circuit high input

P.13A-485

P2127*

Accelerator pedal position sensor (sub) circuit low input

P.13A-493

P2128*

Accelerator pedal position sensor (sub) circuit high input

P.13A-502

P2135*

Throttle position sensor (main and sub) range/performance problem

P.13A-510

P2138*

Accelerator pedal position sensor (main and sub) range/performance 
problem

P.13A-515

U1100

Engine CAN time

−out/ not equipped - (Refer to Group 54A)

P.54A-51

U1102

ABS

−ECU time−out - (Refer to Group 54A)

P.54A-55

U1120

Engine CAN message - (Refer to Group 54A)

P.54A-64

U1121

T/M CAN message

P.13A-537

DTC

DIAGNOSTIC ITEM

REFERENCE 
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