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 |
CEL |
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
|
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
|
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
|
Harness and connector / Replace TCM
|
101
|
----
|
42
|
Fuel pump relay control circuit
|
Harness and connector / Fuel pump relay
|
102
|
PO133
|
21
|
Upstream H02S response
|
Harness and connector / Upstream HO2S
|
103
|
PO135
|
21
|
Upstream H02S heater failure
|
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*
|
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*
|
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*
|
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*
|
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*
|
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
|
Obsolete code - Pulsed Secondary Air injection recalled and removed in '96
|
112
|
PO422
|
64
|
Catalytic converter efficiency failure
|
Exhaust manifold for cracks / Replace catalytic converter
|
113
|
PO441
|
31
|
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
|
114
|
P1899
|
37
|
Park/Neutral switch
|
Replace the PCM
|
115
|
PO551
|
65
|
Power steering switch failure
|
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
|
Harness and connector / Downstream HO2S
|
128
|
PO125
|
17
|
Closed loop temperature not reached
|
Engine coolant temperature sensor circuit and connector / Engine coolant sensor / Thermostat
|
132
|
PO121
|
24
|
Throttle position sensor voltage does not agree with MAP
|
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)
|
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
|