11 No ignition reference signal detected during cranking OR timing belt skipped one or more teeth; OR loss of either camshaft or crankshaft position sensor.*
12 Battery or computer recently disconnected*
13 MAP sensor or vacuum line may not be working*
14 MAP sensor voltage below .16V or over 4.96V*
15 No speed/distance sensor signal*
16 Loss of battery voltage detected with engine running*
17 Engine stays cool too long (bad thermostat or coolant sensor?)*
OR*
17 (1985 turbo only): knock sensor circuit*
21 Oxygen sensor signal doesn't change (stays at 4.3-4.5V). Probably bad oxygen sensor*
22 Coolant sensor signal out of range - May have been disconnected to set timing*
23 Incoming air temperature sensor may be bad*
24 Throttle position sensor over 4.96V*
25 Automatic Idle Speed (AIS) motor driver circuit shorted or target idle not reached*
26 Peak injector circuit voltage has not been reached (need to check computer signals, voltage reg, injectors)
27 Injector circuit isn't switching when it's told to (TBI)*
OR (MPI) injector circuit #1 not switching right*
OR (turbo) injector circuit #2 not switching right*
OR (all 1990-) injector output driver not responding*
- check computer, connections*
31 Bad evaporator purge solenoid circuit or driver*
32 (1984 only) power loss/limited lamp or circuit*
OR*
32 EGR gases not working (1988) - check vacuum, valve*
OR*
32 (1990-92) computer didn't see change in air/'fuel ratio when EGR activated - check valve, vacuum lines, and EGR electrical*
33 Air conditioning clutch relay circuit open or shorted (may be in the wide-open-throttle cutoff circuit or normal on early 80's models if you don't have air conditioning)*
34 (1984-86) EGR solenoid circuit shorted or open*
OR*
34 (1987-1991) speed control shorted or open*
35 Cooling fan relay circuit open or shorted*
OR*
35 idle switch motor fault - check connections*
36 (turbo only) Wastegate control circuit open or shorted*
37 Shift indicator light failure, 5-speed*
OR*
part throttle lock/unlock solenoid driver circuit (87-89)*
OR*
solenoid coil circuit (85-87 Turbo only)*
OR*
Trans temperature sensor voltage low (1995 and on)*
41 Alternator field control circuit open or shorted*
42 Automatic shutdown relay circuit open or shorted*
OR*
42 Fuel pump relay control circuit*
OR*
42 Fuel level unit - no change over miles*
OR*
42 Z1 voltage missing when autoshutdown circuit energized (The Z1 voltage is the voltage of the circuits fed by the autoshutdown relay. This typically includes fuel pump and switched-battery feed to the ignition coil)*
43 Peak primary coil current not achieved with max dwell time*
OR*
43 Cylinder misfire*
OR*
43 Problem in power module to logic module interface*
44 No FJ2 voltage present at logic board*
OR*
44 Logic module self-diagnostics indicate problem*
OR*
44 Battery temperature out of range*
45 Turbo boost limit exceeded (engine was shut down by logic module)*
46 Battery voltage too high during charging or charging system voltage too low*
47 Battery voltage too low and alternator output too low*
51 Oxygen sensor stuck at lean position (this may be tripped by a bad MAP sensor system causing a rich condition. If you get hot rough idle and stalling, especially on deceleration, accompanied by flooded engine and difficulty restarting, that can be a bad MAP sensor causing the O2 sensor to try to compensate. If you get poor cold driveability, stumbling and bucking, and acceptable warm driving with poor gas mileage (a drop of 10 mpg or more), that is usually the O2 sensor.*
OR*
51 Internal logic module fault ('84 turbo only).*
52 Oxygen sensor stuck at rich position*
OR*
52 Internal logic module fault ('84 turbo only)*
53 Logic module internal problem*
54 No sync pickup signal during engine rotation (turbo only)*
OR*
54 Internal logic module fault ('84 turbo only) - or camshaft sensor/distributor timing*
55 End of codes*
61 "Baro" sensor open or shorted*
62 EMR mileage cannot be stored in EEPROM*
62 PCM failure SRI mile not stored*
63 Controller cannot write to EEPROM*
64 Catalytic converter efficiency failure*
65 Power steering switch failure*
66 No CCD Message From TCM and/or No CCD Message From BCM


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