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 tool Blink Code Diagnostic Items Check items ---- ---- *55 End of error messages (if this code is the only one indicated, no errors were encountered) ---- ---- 12 direct power input to the PCM has been disconnected within the last 50 key-on cycles ---- 01 PO340 54 No cam signal at PCM camshaft position sensor connector and sensor 02 PO605 53 Internal controller failure Replace the PCM 05 ---- 47 Charging system voltage too low Alternator drive belt / Harness and connector / Alternator 06 ---- 46 Charging system voltage too high Alternator drive belt / Harness and connector / Alternator 10 ---- 42 MFI relay (ASD_relay) control circuit Harness and connector / Fuel pump relay 11 ---- 41 Generator field not switching properly Harness and connector / Alternator 16 ---- 33 A/C clutch relay circuit Harness and connector / A/C clutch relay 17 PO403 32 EGR solenoid circuit Harness and connector / Electric EGR transducer solenoid / EGR valve / EGR tube clogged / Vacuum hoses 18 PO443 31 EVAP solenoid circuit Evaporative purge solenoid / Clogged purge line / Vacuum hose / Evaporative emission canister clogged 61 PO204 27 Injector #4 control circuit Harness and connector / Injectors 19 PO203 27 Injector #3 control circuit Harness and connector / Injectors 20 PO202 27 Injector #2 control circuit Harness and connector / Injectors 21 PO201 27 Injector #1 control circuit Harness and connector / Injectors 25 PO505 25 Idle air control motor circuit Harness and connector / Idle air control motor 26 PO122 24 Throttle position sensor voltage low Harness and connector / Throttle position sensor 27 PO123 24 Throttle position sensor voltage high Harness and connector / Throttle position sensor 30 PO117 22 Engine coolant temperature sensor voltage too low Harness and connector / Engine coolant sensor 32 PO134 21 Upstream H02S stays at center Harness and connector / Upstream HO2S</a> 33 ---- 17 Engine is cold too long Engine cooland temperature sensor circuit and connector / Engine coolant temperature sensor / Thermostat 35 PO500 15 No vehicle speed sensor signal Harness and connector / Vehicle speed sensor 36 PO107 14 MAP sensor voltage too low Harness and connector / Replace MAP sensor 37 PO108 14 MAP sensor voltage too high Harness and connector / Bad VC1 / Replace MAP sensor 39 P1297 13 No change in MAP from start to run Harness and connector / Replace MAP sensor 40 PO335 11 No crank reference signal at PCM Check connector at PCM / Check crankshaft position sensor and harness 42 PO352 43 Ignition coil #2 primary circuit Harness and connector / Ignition coil #2 43 PO351 43 Ignition coil #1 primary circuit Harness and connector / Ignition coil #1 44 ---- 42 No MFI relay (ASD_relay) output voltage at PCM Harness and connector / MFI relay (ASD_relay) 46 PO401 32 EGR System Failure Harness and connector / Electric EGR transducer solenoid / EGR valve / EGR tube clogged / Vacuum hoses 48 ---- 62 PCM failure SRI mile not stored Check PCM Harness / Replace the PCM 49 ---- 63 PCM failure EEPROM write denied Replace the PCM 51 PO412 36 Pulsed secondary air injection solenoid circuit <M/T> Legacy code - Pulsed secondary air injection recalled and removed in '96 57 PO112 23 Intake air temperature sensor voltage low Harness and connector / Intake air temperature sensor 58 PO113 23 Intake air temperature sensor voltage high Harness and connector / Intake air temperature sensor 59 PO325 16 Knock sensor #l circuit Harness and connector / Knock sensor 62 PO132 21 Upstream H02S shorted to voltage Harness and connector / Upstream HO2S 68 PO605 53 PCM failure SPI communications Replace the PCM 71 ---- 44 Battery temperature sensor volts out of limit Battery temperature sensor or harness / Replace the PCM 92 P1490 35 Low speed fan control relay circuit Harness and connector / Low speed fan relay 93 P1489 35 high speed fan control relay circuit Harness and connector / High speed fan relay 99 P1698 66 No CCD messages from TCM <A/T> Harness and connector / Replace TCM 101 ---- 42 Fuel pump relay control circuit Harness and connector / Fuel pump relay 102 PO133 21 Upstream H02S response <M/T> Harness and connector / Upstream HO2S 103 PO135 21 Upstream H02S heater failure <M/T> Harness and connector / Upstream HO2S 104 PO139 21 Downstream HO2S stays at center (M/T) Harness and connector / Downstream H02S / Fuel system 105 PO141 21 Downstream HO2S heater failure (M/T) Harness and connector / Downstream HO2S 106 PO300 43 Multiple 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 107 PO301 43 Cylinder #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 108 PO302 43 Cylinder #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 109 PO303 43 Cylinder #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 110 PO304 43 Cylinder #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 111 PO411 36 Too little secondary air or too much secondary air <M/T> Obsolete code - Pulsed Secondary Air injection recalled and removed in '96 112 PO422 64 Catalytic converter efficiency failure <M/T> Exhaust manifold for cracks / Replace catalytic converter 113 PO441 31 Evaporative 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 114 P1899 37 Park/Neutral switch <A/T> Replace the PCM 115 PO551 65 Power steering switch failure <M/T> Harness and connector / Power steering pressure switch / Power Steering Pump / Low fluid level 118 PO172 52 Fuel System Rich MAP sensor output / Injector / Fuel pressure / Intake air leaks / Heated oxygen sensor / Adjust S-AFC 119 PO171 51 Fuel System Lean MAP sensor output / Injector / Fuel pressure / Intake air leaks / Heated oxygen sensor / Adjust S-AFC 126 PO138 21 Downstream H02S shorted to voltage <M/T> Harness and connector / Downstream HO2S 128 PO125 17 Closed loop temperature not reached <M/T> Engine coolant temperature sensor circuit and connector / Engine coolant sensor / Thermostat 132 PO121 24 Throttle position sensor voltage does not agree with MAP <M/T> Harness and connector / Throttle position sensor output / MAP sensor output 133 P1390 11 Timing belt skipped 1 tooth or more Check timing belt / Check crankshaft sensor and camshaft position sensor / Check PCM connector 138 P1294 25 Target idle not reached (+/-200 r/min) <M/T> Harness and connector / Idle air control motor / Vaccuum leak 157 P1391 11 Intermittent loss of Camshaft Position Sensor or Crankshaft Position Sensor Crankshaft 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