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· PCM Codes



Background:
The information described below allows you to determine
why the Check Engine light is illuminated.

∟About the PCM


When an fault with your car is detected it stores the fault in it's internal EEPROM. Normally, you have to take your car to a dealer to have the problem diagnosed. Thanks to Chrysler's and Mitsubishi's ingenuity, the codes can be displayed with a few simple turns of the ignition key. Although the
codes listed will help you diagnose a problem with your car, they do not allow for complete diagnosis and/or also may not even be the actual problem.

For complete diagnosis you will require a scan tool and a service manual. I can't stress enough the help that the service manual provides for problem diagnosis. Everyone should own a service manual if they are planning to do any work on their car.

THE KEYDANCE

To check the PCM codes, insert the key into the ignition and switch the key ON-OFF-ON-OFF-ON within a 5 sec. time period. Then count the Engine light flashes. The number of flashes represents the trouble code. There is a slight pause between the flashes representing the first and second digits of the code. Longer pauses separate indivdual trouble codes. All codes will end with 55 which signifies End of Codes / No detected failure.

IF A CODE IS A LINK

Click on it, and you should have a detailed way to troubleshoot the code.


∟PCM Codes and Datalogger designations for the DSM 420A


The diagnostic items are shown in the following table. Note that a faults numeric codes are different,
depending on the method of inspection.

Scan tool (MUT-II)General scan toolBlink Code Diagnostic ItemsCheck items
--------*55 End of error messages(if this code is the only one indicated, no errors were encountered)
--------12direct power input to the PCM has been disconnected within the last 50 key-on cycles----
01PO34054No cam signal at PCMcamshaft position sensor connector and sensor
02PO60553Internal controller failureReplace the PCM
05----47Charging system voltage too lowAlternator drive belt / Harness and connector / Alternator
06----46Charging system voltage too highAlternator drive belt / Harness and connector / Alternator
10----42MFI relay (ASD_relay) control circuitHarness and connector / Fuel pump relay
11----41Generator field not switching properlyHarness and connector / Alternator
16----33A/C clutch relay circuitHarness and connector / A/C clutch relay
17PO40332EGR solenoid circuitHarness and connector / Electric EGR transducer solenoid / EGR valve / EGR tube clogged / Vacuum hoses
18PO44331EVAP solenoid circuitEvaporative purge solenoid / Clogged purge line / Vacuum hose / Evaporative emission canister clogged
61PO20427Injector #4 control circuitHarness and connector / Injectors
19PO20327Injector #3 control circuitHarness and connector / Injectors
20PO20227Injector #2 control circuitHarness and connector / Injectors
21PO20127Injector #1 control circuitHarness and connector / Injectors
25PO50525Idle air control motor circuitHarness and connector / Idle air control motor
26PO12224Throttle position sensor voltage lowHarness and connector / Throttle position sensor
27PO12324Throttle position sensor voltage highHarness and connector / Throttle position sensor
30PO11722Engine coolant temperature sensor voltage too lowHarness and connector / Engine coolant sensor
32PO13421Upstream H02S stays at centerHarness and connector / Upstream HO2S</a>
33----17Engine is cold too longEngine cooland temperature sensor circuit and connector / Engine coolant temperature sensor / Thermostat
35PO50015No vehicle speed sensor signalHarness and connector / Vehicle speed sensor
36PO10714MAP sensor voltage too lowHarness and connector / Replace MAP sensor
37PO10814MAP sensor voltage too highHarness and connector / Bad VC1 / Replace MAP sensor
39P129713No change in MAP from start to runHarness and connector / Replace MAP sensor
40PO33511No crank reference signal at PCMCheck connector at PCM / Check crankshaft position sensor and harness
42PO35243Ignition coil #2 primary circuitHarness and connector / Ignition coil #2
43PO35143Ignition coil #1 primary circuitHarness and connector / Ignition coil #1
44----42No MFI relay (ASD_relay) output voltage at PCMHarness and connector / MFI relay (ASD_relay)
46PO40132EGR System FailureHarness and connector / Electric EGR transducer solenoid / EGR valve / EGR tube clogged / Vacuum hoses
48----62PCM failure SRI mile not storedCheck PCM Harness / Replace the PCM
49----63PCM failure EEPROM write deniedReplace the PCM
51PO41236Pulsed secondary air injection solenoid circuit <M/T>Legacy code - Pulsed secondary air injection recalled and removed in '96
57PO11223Intake air temperature sensor voltage lowHarness and connector / Intake air temperature sensor
58PO11323Intake air temperature sensor voltage highHarness and connector / Intake air temperature sensor
59PO32516Knock sensor #l circuitHarness and connector / Knock sensor
62PO13221Upstream H02S shorted to voltageHarness and connector / Upstream HO2S
68PO60553PCM failure SPI communicationsReplace the PCM
71----44Battery temperature sensor volts out of limitBattery temperature sensor or harness / Replace the PCM
92P149035Low speed fan control relay circuitHarness and connector / Low speed fan relay
93P148935high speed fan control relay circuitHarness and connector / High speed fan relay
99P169866No CCD messages from TCM <A/T>Harness and connector / Replace TCM
101----42Fuel pump relay control circuitHarness and connector / Fuel pump relay
102PO13321Upstream H02S response <M/T>Harness and connector / Upstream HO2S
103PO13521Upstream H02S heater failure <M/T>Harness and connector / Upstream HO2S
104PO13921Downstream HO2S stays at center (M/T)Harness and connector / Downstream H02S / Fuel system
105PO14121Downstream HO2S heater failure (M/T)Harness and connector / Downstream HO2S
106PO30043Multiple cylinder misfire* <M/T>Ignition coil / Spark plugs / Ignition circuit / Injector / Upstream HO2S / Compression pressure / Timing belt / Crankshaft position sensor / Air intake / Fuel pressure / Crankshaft position sensor circuit and connector / Bad tuning
107PO30143Cylinder #l misfire* <M/T>Ignition coil / Spark plugs / Ignition circuit / Injector / Upstream HO2S / Compression pressure / Timing belt / Crankshaft position sensor / Air intake / Fuel pressure / Crankshaft position sensor circuit and connector / Bad tuning
108PO30243Cylinder #2 misfire* <M/T>Ignition coil / Spark plugs / Ignition circuit / Injector / Upstream HO2S / Compression pressure / Timing belt / Crankshaft position sensor / Air intake / Fuel pressure / Crankshaft position sensor circuit and connector / Bad tuning
109PO30343Cylinder #3 misfire* <M/T>Ignition coil / Spark plugs / Ignition circuit / Injector / Upstream HO2S / Compression pressure / Timing belt / Crankshaft position sensor / Air intake / Fuel pressure / Crankshaft position sensor circuit and connector / Bad tuning
110PO30443Cylinder #4 misfire* <M/T>Ignition coil / Spark plugs / Ignition circuit / Injector / Upstream HO2S / Compression pressure / Timing belt / Crankshaft position sensor / Air intake / Fuel pressure / Crankshaft position sensor circuit and connector / Bad tuning
111PO41136Too little secondary air or too much secondary air <M/T>Obsolete code - Pulsed Secondary Air injection recalled and removed in '96
112PO42264Catalytic converter efficiency failure <M/T>Exhaust manifold for cracks / Replace catalytic converter
113PO44131Evaporative purge flow monitor failure <M/T>Evaporative purge solenoid / Clogged purge line / Vacuum hose / Evaporative emission canister clogged / You're Turbo with a 97, 98, or 99 2GNT
114P189937Park/Neutral switch <A/T>Replace the PCM
115PO55165Power steering switch failure <M/T>Harness and connector / Power steering pressure switch / Power Steering Pump / Low fluid level
118PO17252Fuel System RichMAP sensor output / Injector / Fuel pressure / Intake air leaks / Heated oxygen sensor / Adjust S-AFC
119PO17151Fuel System LeanMAP sensor output / Injector / Fuel pressure / Intake air leaks / Heated oxygen sensor / Adjust S-AFC
126PO13821Downstream H02S shorted to voltage <M/T>Harness and connector / Downstream HO2S
128PO12517Closed loop temperature not reached <M/T>Engine coolant temperature sensor circuit and connector / Engine coolant sensor / Thermostat
132PO12124Throttle position sensor voltage does not agree with MAP <M/T>Harness and connector / Throttle position sensor output / MAP sensor output
133P139011Timing belt skipped 1 tooth or moreCheck timing belt / Check crankshaft sensor and camshaft position sensor / Check PCM connector
138P129425Target idle not reached (+/-200 r/min) <M/T>Harness and connector / Idle air control motor / Vaccuum leak
157P139111Intermittent loss of Camshaft Position Sensor or Crankshaft Position SensorCrankshaft position sensor and camshaft position sensor connector / bad Camshaft Position Sensor oil seal


Note: (A/T) refers to Automatic Transmission, (M/T) refers to Manual Transmission, A/C refers to air conditioning. This info taken from the 1997 DSM Factory Service Manual, Vol - 1 Engine and Body. All information is copyright Mitsubishi Motors Corporation.</font>

There are general OBD2 codes that are not listed in this document, as they are not 2GNT specific.


Document statistics: Last modified on 2024-05-03 18:26:12 by DarkOne


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