Mitsubishi Montero (2004+). Manual — part 135
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-27
P0138
Heated oxygen sensor circuit high voltage (bank 1 sensor 2)
P0139
Heated oxygen sensor circuit slow response (bank 1 sensor 2)
P0141
Heated oxygen sensor heater circuit (bank 1 sensor 2)
P0150
Heated oxygen sensor circuit (bank 2 sensor 1)
P0151
Heated oxygen sensor circuit low voltage (bank 2 sensor 1)
P0152
Heated oxygen sensor circuit high voltage (bank 2 sensor 1)
P0153
Heated oxygen sensor circuit slow response (bank 2 sensor 1)
P0154*
Heated oxygen sensor circuit no activity detected (bank 2 sensor 1)
P0155
Heated oxygen sensor heater circuit (bank 2 sensor 1)
P0156
Heated oxygen sensor circuit (bank 2 sensor 2)
P0157
Heated oxygen sensor circuit low voltage (bank 2 sensor 2)
P0158
Heated oxygen sensor circuit high voltage (bank 2 sensor 2)
P0159
Heated oxygen sensor circuit slow response (bank 2 sensor 2)
P0161
Heated oxygen sensor heater circuit (bank 2 sensor 2)
P0171
System too lean (bank 1)
P0172
System too rich (bank 1)
P0174
System too lean (bank 2)
P0175
System too rich (bank 2)
P0181
Fuel tank temperature sensor circuit range/performance
P0182
Fuel tank temperature sensor circuit low input
P0183
Fuel tank temperature sensor circuit high input
P0201
Injector circuit-Cylinder 1
P0202
Injector circuit-Cylinder 2
P0203
Injector circuit-Cylinder 3
P0204
Injector circuit-Cylinder 4
P0205
Injector circuit-Cylinder 5
P0206
Injector circuit-Cylinder 6
P0222*
Throttle position sensor (sub) circuit low input
P0223*
Throttle position sensor (sub) circuit high input
P0300
Random/multiple cylinder misfire detected
P0301
Cylinder 1 misfire detected
P0302
Cylinder 2 misfire detected
P0303
Cylinder 3 misfire detected
P0304
Cylinder 4 misfire detected
P0305
Cylinder 5 misfire detected
P0306
Cylinder 6 misfire detected
DTC NO.
DIAGNOSTIC ITEM
REFERENCE
PAGE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-28
P0325
Knock sensor circuit
P0335*
Crankshaft position sensor circuit
P0340*
Camshaft position sensor circuit
P0401
Exhaust gas recirculation flow insufficient detected
P0403
Exhaust gas recirculation control circuit
P0421
Warm up catalyst efficiency below threshold (bank 1)
P0431
Warm up catalyst efficiency below threshold (bank 2)
P0441
Evaporative emission control system incorrect purge flow
P0442
Evaporative emission control system leak detected (Small leak)
P0443
Evaporative emission control system purge control valve circuit
P0446
Evaporative emission control system vent control
P0451
Evaporative emission control system pressure sensor range/performance
P0452
Evaporative emission control system pressure sensor low input
P0453
Evaporative emission control system pressure sensor high input
P0455
Evaporative emission control system leak detected (Gross leak)
P0456
Evaporative emission control system leak detected (Very small leak)
P0461
Fuel level sensor circuit range/performance
P0500*
Vehicle speed sensor
malfunction
• A/T DTC No. 29 (Vehicle speed sensor
system: Short circuit/open circuit
P0506
Idle control system RPM lower than expected
P0507
Idle control system RPM higher than expected
P0513
Immobilizer malfunction
P0551
Power steering pressure sensor circuit range/performance
P0554
Power steering pressure sensor circuit intermittent
P0606*
Powertrain control module main processor malfunction
P0638*
Throttle actuator control motor circuit range/ performance problem
P0642*
Throttle position sensor power supply
P0657*
Throttle actuator control motor relay circuit malfunction
P0660
Intake manifold tuning circuit malfunction
P0705
Transmission range
switch circuit malfunction
(PRNDL input)
• A/T DTC No. 27 (Transmission range switch
system: Open circuit)
• A/T DTC No. 28 (Transmission range switch
system: Short circuit)
P0712
Transmission fluid
temperature sensor low
input
• A/T DTC No. 16 (Transmission fluid
temperature sensor system: Short circuit)
P0713
Transmission fluid
temperature sensor high
input
• A/T DTC No. 15 (Transmission fluid
temperature sensor system: Open circuit)
DTC NO.
DIAGNOSTIC ITEM
REFERENCE
PAGE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-29
P0715
Input/turbine speed
sensor circuit
• A/T DTC No. 22 (Input shaft speed sensor
system: Short circuit/Open circuit)
P0720
Output speed sensor
circuit
• A/T DTC No. 23 (Output shaft speed sensor
system: Short circuit/Open circuit)
P0731
Gear 1 incorrect
• A/T DTC No. 41 (1st gear incorrect ratio)
P0732
Gear 2 incorrect
• A/T DTC No. 42 (2nd gear incorrect ratio)
P0733
Gear 3 incorrect
• A/T DTC No. 43 (3rd gear incorrect ratio)
P0734
Gear 4 incorrect
• A/T DTC No. 44 (4th gear incorrect ratio)
P0735
Gear 5 incorrect
• A/T DTC No. 45 (5th gear incorrect ratio)
P0736
Gear R incorrect
• A/T DTC No. 46 (Reverse gear incorrect
ratio)
P0741
Torque converter clutch
circuit performance or
stuck off
• A/T DTC No. 52 (Torque converter clutch
solenoid system: Defective system)
P0742
Torque converter clutch
circuit stuck on
• A/T DTC No. 53 (Torque converter clutch
solenoid system: Lock-up stuck on)
P0743
Torque converter clutch
circuit electrical
• A/T DTC No. 36 (Torque converter clutch
solenoid system: Short circuit/Open circuit)
P0753
Shift solenoid "A"
electrical
• A/T DTC No. 31 (Low and reverse solenoid
valve system: Short circuit/Open circuit)
P0758
Shift solenoid "B"
electrical
• A/T DTC No. 32 (Underdrive solenoid valve
system: Short circuit/Open circuit)
P0763
Shift solenoid "C"
electrical
• A/T DTC No. 33 (Second solenoid valve
system: Short circuit/Open circuit)
P0768
Shift solenoid "D"
electrical
• A/T DTC No. 34 (Overdrive solenoid valve
system: Short circuit/Open circuit)
P0773
Shift solenoid "E"
electrical
• A/T DTC No. 35 (Reduction solenoid valve
system: Short circuit/Open circuit)
P1601*
Communication malfunction (between PCM and throttle actuator control
module)
P1603*
Battery backup circuit malfunction
P1751
A/T control relay
malfunction
• A/T DTC No. 54 (A/T control relay system:
Short circuit to ground /open circuit)
P2100*
Throttle actuator control motor circuit (open )
P2101*
Throttle actuator control motor magneto malfunction
P2102*
Throttle actuator control motor circuit(shorted low)
P2103*
Throttle actuator control motor circuit (shorted high)
P2108*
Throttle actuator control processor malfunction
P2121*
Accelerator pedal position sensor (main) circuit range/performance
problem
P2122*
Accelerator pedal position sensor (main) circuit low input
P2123*
Accelerator pedal position sensor (main) circuit high input
DTC NO.
DIAGNOSTIC ITEM
REFERENCE
PAGE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-30
NOTE: Do not replace the powertrain control module (PCM) until a through terminal check reveals there are
no short/open circuits.
NOTE: Check that the PCM ground circuit is normal before checking for the cause of the problem.
NOTE: After the PCM detects a malfunction, a diagnostic trouble code is recorded the next time the engine is
started and the same malfunction is re-detected. However, for items marked with a "*", the diagnostic trouble
code is recorded on the first detection of the malfunction.
NOTE: Sensor 1 indicates the sensor mounted at a position closest to the engine, and sensor 2 indicates the
sensor mounted at the position second closest to the engine.
NOTE: Bank 1 indicates the right bank side cylinder, and Bank 2 indicates the left bank side cylinder.
SYMPTOM CHART
M1131151500715
.
NOTE: Check that the PCM ground circuit is normal
before checking for the cause of the problem.
P2126*
Accelerator pedal position sensor (sub) circuit range/performance
problem
P2127*
Accelerator pedal position sensor (sub) circuit low input
P2128*
Accelerator pedal position sensor (sub) circuit high input
P2135*
Throttle position sensor (main and sub)range/performance ploblem
P2138*
Accelerator pedal position sensor (main and sub)range/performance
ploblem
P2227*
Barometric pressure circuit range/performance problem
P2228*
Barometric pressure circuit low input
P2229*
Barometric pressure circuit high input
DTC NO.
DIAGNOSTIC ITEM
REFERENCE
PAGE
TROUBLE SYMPTOMS
INSPECTION
PROCEDURE
REFERENCE
PAGE
Communication
with scan tool is
impossible
Communication with all systems is not possible
1
Communication with PCM only is not possible
2
Malfunction
Indicator Lamp
(SERVICE
ENGINE SOON
or Check
Engine Lamp)
and related
parts
The Malfunction Indicator Lamp (SERVICE ENGINE
SOON or Check Engine Lamp) does not illuminate
right after the ignition switch is turned to the "ON"
position
3
The Malfunction Indicator Lamp (SERVICE ENGINE
SOON or Check Engine Lamp) remains illuminated
and never goes out
4
Starting
Cranks, won't start
5
Starts up and dies
6
Hard starting
7
Idling stability
(improper
idling)
Unstable idle (rough idle, hunting)
8
Idle speed is high (improper idle speed)
9
Idle speed is low (improper idle speed)
10
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