11 No distributor reference signal during engine cranking 12 Battery pwer to compute disconnected in last 50 to 100 cycles; memory standby power lost ( 1983-1990 ) 13 Manifold absolute pressure ( MAP ) sensor vacuum circuit slow or no change in MAP sensor input or output 14 Manifold absolute pressure sensor electrical circuit high or low voltage 15 Vehicle speed sensor circuit 16 Loss of battery voltage ( 1983-1989 ) 17 Knock sensor circuit open or shorted during engine operation ( 1985 and 1986 turbo models ) 17 Engine running too cold 21 Oxygen sensor circuit voltage in neutral zone or above normal range 22 Coolant temperature sensor unit high or low voltage 23 Throttle body air temperature sensor circuit high or low voltage ( 1987-1990 TBI models ) 23 Intake air temperature sensor circuit high or low voltage ( 1991-1998 ) 24 Throttle position sensor circuit high or low voltage 25 Idle speed control ( ISC ) or idle air control ( IAC ) motor driver circuit shorted 25 Automatic idle speed ( AIS ) motor driver circuit shorted 26 Peak injector driver current not reached because of high resistance in circuit 27 Injector driver not responding correctly to injector control signal 31 Canister purge solenoid circuit open or shorted 32 Exhaust Gas Recirculation ( EGR ) transducer solenoid circuit open or shorted, or EGR system failed to respond to command ( 1987-1994 ) 32 Malfunction indicator lamp ( MIL ) circuit open or shorted ( 1983-1986 ) 33 Air conditioning clutch relay circuit open or shorted 34 Spare driver circuit open or shorted ( 1985 models ) 34 Open or shorted circuit at the EGR solenoid ( 1983-1985 ) 34 Speed control vacuum or vent solenoid circuit open or shorted 35 Cooling fan relay circuit open or shorted 35 Idle switch circuit open or shorted ( 1988-1994 RWD models ) 36 Spare driver circuit open or shorted 36 Turbocharger wastegate solenoid circuit open or shorted 37 Shift indicator lamp circuit open or shorted ( 1985 and 1986 models with manual transmission ) 37 Part throttle unlock solenoid driver circuit open or shorted ( 1985 and 1986 models with automatic transmission ) 37 Baro solenoid circuit open or shorted ( turbo models ) 41 Charging system excess or lack of field current 42 Automatic shutdown driver ( ASD ) relay circuit open or shorted 43 Ignition coil control circuit or spark interface circuit output stage not responding to control command 44 Fault in computer ( 1983 and 1984 models ) 44 Battery temperature signal out of range ( 1985-1987 and 1992-1994 3.3 L and 3.8 L ) 44 No fused circuit voltage at computer connector during engine operation ( 1987-1989 ) 45 Overboost shut off circuit on MAP sensor reading above overboost limit 45 Overdrive solenoid circuit open or shorted ( 1989-1994 RWD models ) 46 Charging system voltage too high 47 Charging system voltage too low 51 Oxygen sensor voltage indicates lean during engine operation 52 Oxygen sensor voltage indicates rich during engine operation 52 Fault present in computer ( 1983-1986 ) 53 Module internal problem; SMEC/SBEC failure; internal engine controller fault condition detected 54 Problem with the distributor syncronization circuit, no sync pick-up signal detected during operation 55 End of code output 61 BARO solenoid circuit open or shorted ( 1989 turbo models ) 62 Emissions maintenance reminder light mileage is not being updated ( 1989 on ) 63 EEPROM write denied, controller failure ( 1989 on ) 64 Speed control vent solenoid no. 1 circuit open or shorted ( 1990 2.2 L turbo ) 64 Flexible fuel ( methanol ) sensor indicates concentration sensor input more than the acceptable voltage 64 Flexible fuel ( methanol ) sensor indicates concentration sensor input less than the acceptable voltage 65 Manifold tuning valve solenoid circuit open or shorted 65 Power steering switch failure ( 1996 models ) 66 No message from the transmission control module ( TCM ) to the powertrain control module ( PCM ) 66 No message from the body control module ( BCM ) to the powertrain control module ( PCM ) 71 5 volt PCM output low 72 Catalytic converter efficiency failure 77 Speed control power relay circuit 88 Start of test