- Code 11 - Distributor signal circuit
When monitored
- During cranking
When placed in memory - If no signal is present since memory was last cleared.
- Code 12 - Battery feed to computer
When monitored
- Ignition on
When placed in memory - If battery disconnected in last 30-100 engine starts.
- Code 13 - MAP sensor, vacuum
When monitored
- From 600 to 1500 rpm
When placed in memory - No change in signal between ignition pulses.
- Code 14 - MAP sensor, electrical
When monitored
- From 400 to 1500 rpm
When placed in memory - MAP sensor above 4.7V or below .02V.
- Code 15 - Speed sensor
When monitored
- Decel at closed throttle
When placed in memory - If less than 2 mph indicated for over 7-10 seconds on decel.
- Code 16 - Battery sense voltage
When monitored
- 1 min after start
When placed in memory - Battery voltage drops 4 volts for more then 14 sec.
- Code 17 - Cooling system
When monitored
- 12 min after start
When placed in memory - Coolant doesn't reach 160 degrees after 8 min.
- Code 21 - Oxygen sensor
When monitored
- Temp 170F/ RPM over 1500
When placed in memory - If no rich/lean indicated for 2-12 min.
- Code 22 - Coolant sensor
When monitored
- Ignition on
When placed in memory - If voltage above 4.96(cold) or below .51(warm)
- Code 23 - Charge air sensor
When monitored
- Ignition on
When placed in memory - If voltage above 4.96(cold) or below .51(warm)
- Code 24 - Throttle P. sensor
When monitored
- Ignition on
When placed in memory - If voltage above 4.7 or below .16
- Code 25 - Idle speed motor
When monitored
- Engine at idle
When placed in memory - Proper voltage not present, open circuit will not set.
- Code 26 - Fuel injectors 1 & 2
When monitored
- Engine cranking
When placed in memory - 85-87 injectors not firing correctly
- Code 27 - Fuel injectors 3 & 4
When monitored
- Engine cranking
When placed in memory - 85-87 injectors not firing correctly
- Code 31 - Purge solenoid
When monitored
- Ignition on
When placed in memory - Solenoid not turning on and off properly
- Code 32 - Power loss lamp
When monitored
- Ignition on
When placed in memory - 84-86 lamp not working correctly
- Code 33 - A/C relay
When monitored
- Ignition on
When placed in memory - Relay not turning on and off properly. This can post on a car that didn't come with A/C! Thanks markrochesterrc !!
- Code 34 - EGR solenoid
When monitored
- Ignition on
When placed in memory - 84-86 solenoid not turning on and off properly
- Code 34 - Speed control
When monitored
- Engine running
When placed in memory - 87-88 servo not working properly when cruise is on
- Code 35 - Radiator fan relay
When monitored
- Ignition on
When placed in memory - Relay not turning on and off properly
- Code 36 - Wastegate control
When monitored
- Ignition on
When placed in memory - 85-88 solenoid not turning on and off properly
- Code 37 - Baro read solenoid
When monitored
- Ignition on
When placed in memory - Solenoid not turning on and off properly
- Code 41 - Alternator Field
When monitored
- Ignition on
When placed in memory - Battery volts to ASD is below 11.75 for more than 22 sec
- Code 42 - Auto shutdown relay
When monitored
- Ignition on
When placed in memory - Relay not turning on and off properly
- Code 43 - Spark control
When monitored
- Ignition on
When placed in memory - 84-86 S.C.Interface fails to switch properly
- Code 43 - Spark control
When monitored
- During cranking
When placed in memory - 87-88 S.C.Interface fails to switch properly
- Code 44 - Logic module
When monitored
- Ignition on
When placed in memory - 84 only wrong PROM in logic module
- Code 44 - Battery temp voltage
When monitored
- During cranking
When placed in memory - 85-87 sensor signal above 4.9 or below .04
- Code 44 - Fused J-2
When monitored
- Ignition on
When placed in memory - 88 J2 not present to logic module in SMEC
- Code 45 - Overboost monitor
When monitored
- Engine running
When placed in memory - Boost out of predetermined range
- Code 46 - Battery volt sensing
When monitored
- Engine running
When placed in memory - Battery volts 1 volt above desired for more than 25 sec
- Code 47 - Battery volt sensing
When monitored
- Engine running/160F
When placed in memory - Battery volts 1 volt below desired for more than 35 sec
- Code 51 - Oxygen sensor
When monitored
- Engine running/closed loop
When placed in memory - 84 rich/lean more than 2 min/85-88 lean more than 12 min
- Code 52 - Oxygen sensor
When monitored
- Engine running/closed loop
When placed in memory - 85-88 rich more than 12 min
- Code 52 - Logic module failure
When monitored
- Ignition on
When placed in memory - 84 Logic module failure
- Code 53 - Logic module failure
When monitored
- Ignition on
When placed in memory - 85-86 Logic module failure
- Code 54 - Dist.Sync.pickup
When monitored
- Engine running
When placed in memory - No signal at logic module
- Code 55 - End of Codes