Mitsubishi Evolution X. Manual — part 267
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-45
P0139
Heated oxygen sensor (rear) circuit slow response
P0140
Heated oxygen sensor (rear) circuit no activity detected
P0171
System too lean
P0172
System too rich
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
P0222*
Throttle position sensor (sub) circuit low input
P0223*
Throttle position sensor (sub) circuit high input
P0234
Turbocharger wastegate system malfunction
P0243
Turbocharger wastegate solenoid 1 circuit
P0247
Turbocharger wastegate solenoid 2 circuit
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
P0327
Knock sensor circuit low
P0328
Knock sensor circuit high
P0335*
Crankshaft position sensor circuit
P0340*
Intake camshaft position sensor circuit
P0365*
Exhaust camshaft position sensor circuit
P0420
Warm up catalyst efficiency below threshold
P0441
Evaporative emission control system incorrect purge flow
P0442
Evaporative emission control system leak detected (small leak)
P0443
Evaporative emission purge solenoid circuit
P0446
Evaporative emission ventilation solenoid circuit
P0450
Fuel tank differential pressure sensor malfunction
P0451
Fuel tank differential pressure circuit range/performance problem
P0452
Fuel tank differential pressure circuit low input
P0453
Fuel tank differential pressure circuit 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 (main) circuit range/performance
P0462
Fuel level sensor circuit low input
P0463
Fuel level sensor circuit high input
P0500*
Vehicle speed signal malfunction
DTC
DIAGNOSTIC ITEM
REFERENCE
PAGE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-46
P0506
Idle control system RPM lower than expected
P0507
Idle control system RPM higher than expected
P0513
Immobilizer malfunction
P0551
Power steering pressure switch circuit range/performance
P0554
Power steering pressure switch circuit intermittent
P0603*
EEPROM malfunction
P0606*
Engine control module main processor malfunction
P0622
Generator FR terminal circuit malfunction
P0630*
Vehicle Identification Number (VIN) malfunction
P0638*
Throttle actuator control motor circuit range/performance
P0642*
Throttle position sensor power supply
P0657*
Throttle actuator control motor relay circuit malfunction
P0830
Clutch pedal position switch circuit range/performance
P1021
Intake engine oil control valve circuit
P1025
Exhaust engine oil control valve circuit
P1231
Active stability control plausibility
P1232
Fail safe system
P1233*
Throttle position sensor (main) plausibility
P1234*
Throttle position sensor (sub) plausibility
P1235*
Mass airflow sensor plausibility
P1236*
A/D converter
P1237*
Accelerator pedal position sensor plausibility
P1238*
Mass airflow sensor plausibility (torque monitor)
P1239*
Engine RPM plausibility
P1240
Ignition angle
P1241*
Torque monitor
P1242
Fail safe control monitor
P1243
Inquiry/response error
P1244
RAM test for all area
P1245
Cycle RAM test (engine)
P1247
TC-SST plausibility <TC-SST>
P1320
Ignition timing retard insufficient
P1506
Idle control system RPM lower than expected at low temperature
P1507
Idle control system RPM higher than expected at low temperature
P1590*
TCM to ECM communication error in torque reduction request <TC-SST>
P1603*
Battery backup circuit malfunction
P1676*
Variant coding
P2066
Fuel level sensor (sub) circuit range/performance
P2100*
Throttle actuator control motor circuit (open)
P2101*
Throttle actuator control motor magneto malfunction
P2122*
Accelerator pedal position sensor (main) circuit low input
DTC
DIAGNOSTIC ITEM
REFERENCE
PAGE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-47
NOTE: Do not replace the engine control module (ECM) until a through terminal check reveals there are no
short/open circuits.
NOTE: Check that the ECM ground circuit is normal before checking for the cause of the problem.
NOTE: After the ECM 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 of the heated oxygen sensor indicates the sensor mounted at a position closest to the
engine, and sensor 2 of the heated oxygen sensor indicates the sensor mounted at the position second clos-
est to the engine.
P2123*
Accelerator pedal position sensor (main) circuit high input
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 problem
P2138*
Accelerator pedal position sensor (main and sub) range/performance problem
P2195
Heated Oxygen Sensor (front) Inactive
P2228*
Barometric pressure circuit low input
P2229*
Barometric pressure circuit high input
P2252
Heated oxygen sensor offset circuit low voltage
P2253
Heated oxygen sensor offset circuit high voltage
P2263
Intake charge system malfunction
U0001
Bus off
U0101* TC-SST-ECU time-out <TC-SST>
U0121* ASC-ECU time-out
U0141* ETACS-ECU time-out
U0167
Immobilizer communication error
U1180*
Combination meter time-out
DTC
DIAGNOSTIC ITEM
REFERENCE
PAGE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-48
SYMPTOM CHART
M1131151502711
CAUTION
During diagnosis, a DTC 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.
CAUTION
Disconnecting the battery cables or removing the combination meter will erase the learned value of
the fuel gauge. To recover the learned value, input a vehicle speed (by actually driving the vehicle or
inputting a simulated vehicle speed), and stop the vehicle. This will complete the learning process.
NOTE: Check that the ECM ground circuit is normal before checking for the cause of the problem.
NOTE: When the racing (3,000 to 5,000 r/min or more) continues on the vehicle stopped with no load during
the specified time or more, the increase in the engine speed might be limited. This comes from the engine
protection and control functions and is not a malfunction.
.
TROUBLE SYMPTOMS
INSPECTION
PROCEDURE
REFERENCE PAGE
Communication
with scan tool is
impossible
Communication with ECM only is not possible
1
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
2
The Malfunction Indicator Lamp (SERVICE
ENGINE SOON or Check Engine Lamp) remains
illuminated and never goes out
3
Starting
Cranks, won't start
4
Starts up and dies
5
Hard starting
6
Idling stability
(improper idling)
Unstable idle (rough idle, hunting)
7
Idle speed is high (improper idle speed)
8
Idle speed is low (improper idle speed)
9
Idling stability
(engine stalls)
When the engine is cold, it stalls at idle (die out)
10
When the engine is hot, it stalls at idle (die out)
11
The engine stalls when accelerating (pass out)
12
The engine stalls when decelerating
13
Driving
Hesitation, sag, Stumble, Poor acceleration or
Surge
14
Acceleration shock
15
Knocking
16
Too high CO and HC concentration when idling
17
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