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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 Chryslers, 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.

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.

Please note, this procedure only works with vehicles from 1995 to mid year 1997. If you own a 1998+ you will need to get a scan tool, or have a shop do a scan. Some parts companies will do scans for free.

 

CEL Code OBD Code Scan Code Diagnosis Resolution
11 PO335 40 No crank reference signal at PCM Check connector at PCM / Check crankshaft position sensor and harness
11 P1391 157 Intermittent loss of Camshaft Position Sensor or Crankshaft Position Sensor Crankshaft position sensor and camshaft position sensor connector / bad Camshaft Position Sensor oil seal
11 P1390 133 Timing belt skipped 1 tooth or more Check timing belt / Check crankshaft sensor and camshaft position sensor / Check PCM connector
12     direct power input to the PCM has been disconnected within the last 50 key-on cycles Check for loose battery cables. Normal after PCM reset
13 P1297 39 No change in MAP from start to run Harness and connector / Replace MAP sensor
14 PO108 37 MAP sensor voltage too high Harness and connector / Bad VC1 / Replace MAP sensor
14 PO107 36 MAP sensor voltage too low Harness and connector / Replace MAP sensor
15 PO500 35 No vehicle speed sensor signal Harness and connector / Vehicle speed sensor
16 PO325 59 Knock sensor #l circuit Harness and connector / Knock sensor
17 PO125 128 Closed loop temperature not reached Engine coolant temperature sensor circuit and connector / Engine coolant sensor / Thermostat
17   33 Engine is cold too long Engine cooland temperature sensor circuit and connector / Engine coolant temperature sensor / Thermostat
21 PO134 30 Upstream H02S stays at center Harness and connector / Upstream HO2S
21 PO141 105 Downstream HO2S heater failure (M/T) Harness and connector / Downstream HO2S
21 PO139 104 Downstream HO2S stays at center (M/T) Harness and connector / Downstream HO2S / Fuel system
21 PO133 103 Upstream H02S response Harness and connector / Upstream HO2S
21 PO138 126 Downstream H02S shorted to voltage Harness and connector / Downstream HO2S
21 PO132 62 Upstream H02S shorted to voltage Harness and connector / Upstream HO2S
22 PO117 30 Engine coolant temperature sensor voltage too low Harness and connector / Engine coolant sensor
23 PO112 57 Intake air temperature sensor voltage low Harness and connector / Intake air temperature sensor
23 PO113 58 Intake air temperature sensor voltage high Harness and connector / Intake air temperature sensor
24 PO123 27 Throttle position sensor voltage high Harness and connector / Throttle position sensor
24 PO122 26 Throttle position sensor voltage low Harness and connector / Throttle position sensor
24 PO121 132 Throttle position sensor voltage does not agree with MAP Harness and connector / Throttle position sensor output / MAP sensor output
25 PO505 25 Idle air control motor circuit Harness and connector / Idle air control motor
25 P1294 138 Target idle not reached (k200 r/min) Harness and connector / Idle air control motor / Vaccuum leak
27 PO24 61 Injector #4 control circuit Harness and connector / Injectors
27 PO203 19 Injector #3 control circuit Harness and connector / Injectors
27 PO202 20 Injector #2 control circuit Harness and connector / Injectors
27 PO201 21 Injector #1 control circuit Harness and connector / Injectors
31 PO443 18 EVAP solenoid circuit Evaporative purge solenoid / Clogged purge line / Vacuum hose / Evaporative emission canister clogged
31 PO441 113 Evaporative purge flow monitor failure Evaporative purge solenoid / Clogged purge line / Vacuum hose / Evaporative emission canister clogged / You're Turbo with a 97, 98, or 99 2GNT
32 PO403 17 EGR solenoid circuit Harness and connector / Electric EGR transducer solenoid / EGR valve / EGR tube clogged / Vacuum hoses
32 PO401 46 EGR System Failure Harness and connector / Electric EGR transducer solenoid / EGR valve / EGR tube clogged / Vacuum hoses
33   16 A/C clutch relay circuit Harness and connector / A/C clutch relay
35 P1489 93 high speed fan control relay circuit Harness and connector / High speed fan relay
35 P1490 92 Low speed fan control relay circuit Harness and connector / Low speed fan relay
36 PO411 111 Too little secondary air or too much secondary air Obsolete code - Pulsed Secondary Air injection recalled and removed in '96
36 PO412 51 Pulsed secondary air injection solenoid circuit Legacy code - Pulsed secondary air injection recalled and removed in '96
37 P1899 114 Park/Neutral switch Replace the PCM
37 P1899 114 Park/Neutral switch Replace the PCM
41   11 Generator field not switching properly Harness and connector / Alternator
42   10 MFI relay (ASD relay) control circuit Harness and connector / Fuel pump relay
42   101 Fuel pump relay control circuit Harness and connector / Fuel pump relay
42   44 No MFI relay (ASD relay) output voltage at PCM Harness and connector / MFI relay (ASD relay)
43 PO304 110 Cylinder #4 misfire* 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
43 PO303 109 Cylinder #3 misfire* 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
43 PO302 108 Cylinder #2 misfire* 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
43 PO301 107 Cylinder #l misfire* 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
43 PO300 106 Multiple cylinder misfire* 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
43 PO352 42 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   71 Battery temperature sensor volts out of limit Battery temperature sensor or harness / Replace the PCM
46   06 Charging system voltage too high Alternator drive belt / Harness and connector / Alternator
47   05 Charging system voltage too low Alternator drive belt / Harness and connector / Alternator
51 PO171 119 Fuel System Lean MAP sensor output / Injector / Fuel pressure / Intake air leaks / Heated oxygen sensor / Adjust S-AFC
52 PO172 118 Fuel System Rich MAP sensor output / Injector / Fuel pressure / Intake air leaks / Heated oxygen sensor / Adjust S-AFC
53 PO605 68 PCM failure SPI communications Replace the PCM
53 PO605 02 Internal controller failure Replace the PCM
54 PO340 01 No cam signal at PCM camshaft position sensor connector and sensor
55     End of error messages (if this code is the only one indicated, no errors were encountered)
62   48 PCM failure SRI mile not stored Check PCM Harness / Replace the PCM
63   49 PCM failure EEPROM write denied Replace the PCM
65 PO551 115 Power steering switch failure Harness and connector / Power steering pressure switch / Power Steering Pump / Low fluid level
66 P1698 99 No CCD messages from TCM Harness and connector / Replace TCM
72 P0420   Possible Bad Cat-converter Check your cat.
666   666 Dude.. your screwed. Get a priest, your gonna need it.



 

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