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CEL Codes

Written by Administrator

Wednesday, 16 November 2005

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.

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.

PCM Codes For I4 and V6
Code	Diagnostic Items	Check Items
11	No crankshaft reference at PCM	Check connector at PCM / Check crankshaft position sensor
11	Timing belt skipped 1 tooth or more	Check timing belt / Check crankshaft sensor and camshaft position sensor / Check PCM connector
11	Intermittent loss of camshaft position or crankshaft position	Crankshaft position sensor and camshaft position sensor connector
12	Direct batter input to PCM was disconnected within the last 50 key-on cycles	Check Battery connections / Informative Code
13	No change in MAP from start to run	Harness and connector / Replace MAP sensor
14	Map sensor voltage too high / low	Harness and connector / Replace MAP sensor
15	No vehicle speed sensor signal	Harness and connector / Vehicle speed sensor
16	Knock sensor #1 circuit	Harness and connector / Knock sensor
17	Engine is cold too long	Engine cooland temperature sensor circuit and connector / Engine coolant temperature sensor / Thermostat
17	Closed loop temperature not reached (M/T)	Engine coolant temperature sensor circuit and connector / Engine coolant sensor / Thermostat
21	Upstream HO2S stays at center	Harness and connector / Upstream HO2S
21	Upstream HO2S shorted to voltage	Harness and connector / Upstream HO2S
21	Upstream HO2S response (M/T)	Harness and connector / Upstream HO2S
21	Upstream HO2S heater failure (M/T)	Harness and connector / Upstream HO2S
21	Downstream HO2S stays at center (M/T)	Harness and connector / Downstream HO2S / Fuel system
21	Downstream HO2S heater failure (M/T)	Harness and connector / Downstream HO2S
21	Downstream HO2S shorted to voltage (M/T)	Harness and connector / Downstream HO2S
22	Engine coolant sensor voltage to high/low	Harness and connector / Engine coolant sensor
23	Intake air temperature sensor voltage Low / High	Harness and connector / Intake air temperature sensor
24	Throttle position sensor voltage low	Harness and connector / Throttle position sensor
24	Throttle position sensor voltage high	Harness and connector / Throttle position sensor
24	Throttle position sensor voltage does not agree with MAP (M/T)	Harness and connector / Throttle position sensor output / MAP sensor output
25	Target idle not reached (+/- 200 r/min) (M/T)	Harness and connector / Idle air control motor
25	Idle air control motor circuits	Harness and connector / Idle air control motor
27	Injector control circuit	Harness and connector / Injectors
31	EVAP solenoid circuit	Harness and connector / EVAP solenoid
31	Evaporatice purge flow monitor failure (M/T)	Evaporative purge solenoid / Clogged purge line / Vacuum hose / Evaporative emission canister clogged
32	EGR soleniod circuit	Harness and connector / EGR solenoid
32	EGR system failure	Harness and connector / Electric EGR transducer solenoid / EGR valve / EGR tube clogged / Vacuum hoses
33	A/C clutch relay circuit	Harness and connector / A/C clutch relay
34	Speed control solenoid circuits	Check electrical connections
35	Low / High speed fan control relay circuit	Harness and connector / Low/High speed fan relay
36	Too little or too much secondary air (M/T)	Harness and connector / Pulsed secondary air injection valve / Pulsed secondary air injection solenoid / Pulsed secondary tube clogged / Vacuum hoses
36	Pulsed secondary air injector solenoid circuit (M/T)	Harness and connector / Pulsed secondary air injection solenoid
37	Park / Neutral position (PNP) switch failure (A/T)	Replace the PCM
41	Alternator field not switching properly	Harness and connector / Alternator
42	MFI relay (ASD relay) control circuit	Harness and connector / MFI relay (ASD relay)
42	No MFI relay (ASD relay) output voltage at PCM	Harness and connector / MFI relay (ASD relay)
42	Fuel pump relay control circuit	Harness and connector / Fuel pump relay
43	Ignition coil #1 / #2 primary circuit	Harness and connector / Ignition coil #1/#2
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
44	Battery temperature volts out of limit	Replace the PCM
46	Charging system voltage too high	Alternator drive belt / Harness and connector / Alternator
47	Charging system voltage too low	Alternator drive belt / Harness and connector / Alternator
51	Fuel system lean	Intake air temperature sensor / Engine coolant temperator sensor / Exhaust manifold cracked
52	Fuel system rich	MAP sensor output / Injector / Fuel pressure / Intake air leaks / Heated oxygen sensor
53	PCM failure - SPI communications	Replace PCM
53	Internal controller failure	Replace the PCM
54	No cam signal at PCM	Check harness and connector / Check camshaft sensor
62	PCM failure - SRI mile not stored	Replace the PCM
63	PCM failure - EEPROM write denied	Replace PCM
64	Catalytic converter efficiency failure (M/T)	Exhaust manifold for cracks / Replace catalytic converter
65	Power steering pressure (PSP) switch failure (M/T)	Harness and connector / Power steering pressure switch
66	No CCD messages from TCM (A/T)	Harness and connector
71	5 volts supply output low	Harness and connector

Note: (A/T) refers to Automatic Transmission, (M/T) refers to Manual Transmission, A/C refers to air conditioning. This info taken from the Sebring/Avenger 1995 Service Manual, Vol - 1 Engine and Body. All information is copyright Mitsubishi Motors Corporation.

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About the PCM

PCM Codes For I4 and V6