1995 Jeep Wrangler S, AutomaticFACTORY OEM SERVICE PROCEDURE

Engine Performance DTCS

ENGINE PERFORMANCE DTCS (2.5L)

OEM Code Description
11 NO CRANK REFERENCE SIGNAL AT PCM
13 NO OR SLOW CHANGE IN MAP FROM START TO RUN
13 SLOW CHANGE IN IDLE MAP SENSOR SIGNAL
14 MAP SENSOR VOLTAGE TOO HIGH
14 MAP SENSOR VOLTAGE TOO LOW
15 NO VEHICLE SPEED SENSOR SIGNAL
21 O2S SHORTED TO VOLTAGE
21 O2S STAYS AT CENTER
22 ECT SENSOR VOLTAGE TOO HIGH
22 ECT SENSOR VOLTAGE TOO LOW
23 INTAKE AIR TEMP SENSOR VOLTAGE HIGH
23 INTAKE AIR TEMP SENSOR VOLTAGE LOW
24 THROTTLE POSITION SENSOR VOLTAGE HIGH
24 THROTTLE POSITION SENSOR VOLTAGE LOW
25 IDLE AIR CONTROL MOTOR CIRCUITS
27 INJECTOR CONTROL CIRCUIT
31 EVAP SOLENOID CIRCUIT
33 A/C CLUTCH RELAY CIRCUIT
35 RAD FAN CONTROL RELAY CIRCUIT
37 TORQUE CONVERTER CLUTCH SOLENOID CIRCUIT
42 AUTO SHUTDOWN RELAY CONTROL CIRCUIT
42 NO ASD RELAY VOLT SENSE AT PCM
51 O2S STAYS BELOW CENTER (LEAN)
52 O2S STAYS ABOVE CENTER (RICH)
54 NO CAM SYNC SIGNAL AT PCM
62 PCM FAILURE SRI MILE NOT STORED
63 PCM FAILURE EEPROM WRITE DENIED
ENGINE PERFORMANCE DTCS (4.0L)

OEM Code Description
11 NO CRANK REFERENCE SIGNAL AT PCM
13 NO OR SLOW CHANGE IN MAP FROM START TO RUN
13 SLOW CHANGE IN IDLE MAP SENSOR SIGNAL
14 MAP SENSOR VOLTAGE TOO HIGH
14 MAP SENSOR VOLTAGE TOO LOW
15 NO VEHICLE SPEED SENSOR SIGNAL
21 O2S SHORTED TO VOLTAGE
21 O2S STAYS AT CENTER
22 ECT SENSOR VOLTAGE TOO HIGH
22 ECT SENSOR VOLTAGE TOO LOW
23 INTAKE AIR TEMP SENSOR VOLTAGE HIGH
23 INTAKE AIR TEMP SENSOR VOLTAGE LOW
24 THROTTLE POSITION SENSOR VOLTAGE HIGH
24 THROTTLE POSITION SENSOR VOLTAGE LOW
25 IDLE AIR CONTROL MOTOR CIRCUITS
27 INJECTOR CONTROL CIRCUIT
31 EVAP SOLENOID CIRCUIT
33 A/C CLUTCH RELAY CIRCUIT
35 RAD FAN CONTROL RELAY CIRCUIT
37 TORQUE CONVERTER CLUTCH SOLENOID CIRCUIT
42 AUTO SHUTDOWN RELAY CONTROL CIRCUIT
42 NO ASD RELAY VOLT SENSE AT PCM
51 O2S STAYS BELOW CENTER (LEAN)
52 O2S STAYS ABOVE CENTER (RICH)
54 NO CAM SYNC SIGNAL AT PCM
62 PCM FAILURE SRI MILE NOT STORED
63 PCM FAILURE EEPROM WRITE DENIED
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.