Attempt to clear the codes-see below
Diagnostic Trouble Codes - 1991
Jeep
11 Ignition reference signal.
12 Number of key-ons since last fault.
13 Fault in the map sensor pneumatic circuit.
14 Fault in the map sensor electrical circuit.
15 Fault in the vehicle speed sensor circuit.
16 Battery input sense.
17 Engine running too cool.
21 Problem in the oxygen feedback circuit.
22 Fault in the coolant temperature sensor circuit.
23 MAT temperature sensor.
24 Fault in the throttle position sensor circuit.
25 Fault in the AIS motor drive circuit.
26 Injector n peak current.
27 Fault in injector driver interface circuit.
31 Purge solenoid circuit.
32 EGR solenoid circuit.
33 Fault in air conditioning cutout relay circuit.
34 S/C solenoid circuits.
35 Fault in fan relay circuit.
36 Wastegate solenoid circuit.
37 PTU solenoid circuit.
41 Fault in the charging system or no field current.
42 Fault in the ASD relay driver circuit.
43 Fault in ignition coil control circuit.
44 Battery Temp Voltage.
45 Overdrive solenoid.
46 Battery voltage is too high.
47 Battery voltage is too low.
51 Lean condition is indicated.
52 Rich condition is indicated.
53 Internal problem in module.
54 Fault in the distributor high data rate pickup circuit.
55 Completion of fault code display.
62 Unsuccessful attempt to update EMR mileage.
63 Unsuccessful attempt to write to an EEPROM location by the controller.
76 Fuel pump resistor by-pass relay circuit
Jul 4, 2010 at 9:27 AM
