Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSJEEP1999WRANGLER SE, AUTOMATICREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROLS - TESTS W/CODESDIAGNOSTIC TROUBLE CODE (DTC) DEFINITIONS
1999 Jeep Wrangler SE, Automatic
Diagnostic Trouble Code (DTC) Definitions
1999 Jeep Wrangler SE, AutomaticSECTION Diagnostic Trouble Code (DTC) Definitions
DTC MESSAGES & CODES (1)
| Generic Scan Tool Code | DRB-III Scan Tool Message | ||||||
|---|---|---|---|---|---|---|---|
| P0107 | MAP SENSOR VOLTAGE TOO LOW | ||||||
| P0108 | MAP SENSOR VOLTAGE TOO HIGH | ||||||
| P0112 | IAT SENSOR VOLTAGE LOW | ||||||
| P0113 | IAT SENSOR VOLTAGE HIGH | ||||||
| P0117 | ECT SENSOR VOLTAGE TOO LOW | ||||||
| P0118 | ECT SENSOR VOLTAGE TOO HIGH | ||||||
| P0121 | TPS VOLTAGE DOES NOT AGREE WITH MAP | ||||||
| P0122 | THROTTLE POSITION SENSOR VOLTAGE LOW | ||||||
| P0123 | THROTTLE POSITION SENSOR VOLTAGE HIGH | ||||||
| P0125 | CLOSED LOOP TEMP NOT REACHED | ||||||
| P0131 | 1/1 O2S VOLTAGE SHORTED TO GROUND | ||||||
| P0132 | 1/1 O2 SEN SHORTED TO VOLTAGE | ||||||
| P0133 | 1/1 O2S SLOW RESPONSE | ||||||
| P0134 | 1/1 O2S STAYS AT CENTER | ||||||
| P0135 | 1/1 O2 SENSOR HEATER FAILURE | ||||||
| P0137 | 1/2 O2S VOLTS SHORTED TO GROUND | ||||||
| P0138 | 1/2 O2S SHORTED TO VOLTAGE | ||||||
| P0139 | 1/2 O2 SENSOR SLOW RESPONSE | ||||||
| P0141 | 1/2 O2 SENSOR HEATER FAILURE | ||||||
| P0143 | 1/3 O2 SEN SHORTED TO GROUND | ||||||
| P0144 | 1/3 O2 SEN SHORTED TO VOLTAGE | ||||||
| P0145 | 1/3 O2 SENSOR SLOW RESPONSE | ||||||
| P0147 | 1/3 O2 SENSOR HEATER FAILURE | ||||||
| P0151 | 2/1 O2S VOLTAGE SHORTED TO GROUND | ||||||
| P0152 | 2/1 O2S SHORTED TO VOLTAGE | ||||||
| P0153 | 2/1 O2S SLOW RESPONSE | ||||||
| P0155 | 2/1 O2S HEATER FAILURE | ||||||
| P0161 | 2/2 O2S HEATER FAILURE | ||||||
| P0171 | 1/1 FUEL SYSTEM LEAN | ||||||
| P0172 | 1/1 FUEL SYSTEM RICH | ||||||
| P0174 | 2/1 FUEL SYSTEM LEAN | ||||||
| P0175 | 2/1 FUEL SYSTEM RICH | ||||||
| P0201 | INJECTOR #1 CONTROL CIRCUIT | ||||||
| P0202 | INJECTOR #2 CONTROL CIRCUIT | ||||||
| P0203 | INJECTOR #3 CONTROL CIRCUIT | ||||||
| P0204 | INJECTOR #4 CONTROL CIRCUIT | ||||||
| P0205 | INJECTOR #5 CONTROL CIRCUIT | ||||||
| P0206 | INJECTOR #6 CONTROL CIRCUIT | ||||||
| P0207 | INJECTOR #7 CONTROL CIRCUIT | ||||||
| P0208 | INJECTOR #8 CONTROL CIRCUIT | ||||||
| P0209 | INJECTOR #9 CONTROL CIRCUIT | ||||||
| P0210 | INJECTOR #10 CONTROL CIRCUIT | ||||||
| P0300 | MULTIPLE CYLINDER MISFIRE | ||||||
| P0301 | CYLINDER #1 MISFIRE | ||||||
| P0302 | CYLINDER #2 MISFIRE | ||||||
| P0303 | CYLINDER #3 MISFIRE | ||||||
| P0304 | CYLINDER #4 MISFIRE | ||||||
| P0305 | CYLINDER #5 MISFIRE | ||||||
| P0306 | CYLINDER #6 MISFIRE | ||||||
| P0307 | CYLINDER #7 MISFIRE | ||||||
| P0308 | CYLINDER #8 MISFIRE | ||||||
| P0309 | CYLINDER #9 MISFIRE | ||||||
| P0310 | CYLINDER #10 MISFIRE | ||||||
| P0320 | NO CRANK REFERENCE SIGNAL AT PCM | ||||||
| P0340 | NO CAM SIGNAL AT PCM | ||||||
| P0351 | IGNITION COIL #1 PRIMARY CIRCUIT | ||||||
| P0352 | IGNITION COIL #2 PRIMARY CIRCUIT | ||||||
| P0353 | IGNITION COIL #3 PRIMARY CIRCUIT | ||||||
| P0354 | IGNITION COIL #4 PRIMARY CIRCUIT | ||||||
| P0355 | IGNITION COIL #5 PRIMARY CIRCUIT | ||||||
| P0401 | EGR SYSTEM FAILURE | ||||||
| P0403 | EGR SOLENOID CIRCUIT | ||||||
| P0420 | 1/1 CATALYTIC CONVERTER EFFICIENCY | ||||||
| P0441 | EVAP PURGE FLOW MONITOR FAILURE | ||||||
| P0442 | EVAP LEAK MONITOR SMALL LEAK DETECTED | ||||||
| P0443 | EVAP PURGE SOLENOID CIRCUIT | ||||||
| P0455 | EVAP LEAK MONITOR LARGE LEAK DETECTED | ||||||
| P0460 | FUEL LEVEL UNIT NO CHANGE OVER MILES | ||||||
| P0461 | FUEL LEVEL UNIT NO CHANGE OVER TIME | ||||||
| P0462 | FUEL LEVEL SENSOR VOLTS TOO LOW | ||||||
| P0463 | FUEL LEVEL SENSOR VOLTS TOO HIGH | ||||||
| P0500 | NO VEHICLE SPEED SENSOR SIGNAL | ||||||
| P0505 | IAC MOTOR CIRCUIT | ||||||
| P0505B | IAC MOTOR CIRCUIT | ||||||
| P0505C | IAC MOTOR CIRCUIT | ||||||
| P0505D | IAC MOTOR CIRCUIT | ||||||
| P0505E | IAC MOTOR CIRCUIT | ||||||
| P0522 | OIL PRESSURE SENSOR LOW | ||||||
| P0523 | OIL PRESSURE SENSOR HIGH | ||||||
| P0551 | POWER STEERING SWITCH FAILURE | ||||||
| P0600 | PCM FAILURE SPI COMMUNICATIONS | ||||||
| P0601 | INTERNAL CONTROLLER FAILURE | ||||||
| P0602 | ECM FUELING CALIBRATION ERROR | ||||||
| P0606 | ECM FAILURE | ||||||
| P0622 | GENERATOR FIELD NOT SWITCHING PROPERLY | ||||||
| P0645 | A/C CLUTCH RELAY CIRCUIT | ||||||
| P0700 | EATX CONTROLLER DTC PRESENT | ||||||
| P0711 (2) | TRANS TEMP SENSOR, NO TEMP RISE AFTER START | ||||||
| P0712 (2) | TRANS TEMP SENSOR VOLTAGE TOO LOW | ||||||
| P0713 (2) | TRANS TEMP SENSOR VOLTAGE TOO HIGH | ||||||
| P0720 (3) | LOW OUTPUT SPEED SENSOR RPM, ABOVE 15 MPH | ||||||
| P0740 (2) | TORQ CONV CLU, NO RPM DROP AT LOCKUP | ||||||
| P0743 (2) | TORQUE CONV CLUTCH SOLENOID/TRANS RELAY CKT | ||||||
| P0748 (2) | GOVERNOR PRESSURE SOLENOID/TRANS RELAY CKTS | ||||||
| P0751 (2) | O/D SWITCH PRESSED (LO) MORE THAN 5 MIN | ||||||
| P0753 (2) | TRANS 3-4 SOLENOID/TRANS RELAY CKTS | ||||||
| P0783 (2) | TRANS 3-4 SHIFT SOL, NO RPM DROP @ 3-4 SHIFT | ||||||
| P1195 | SLOW 1/1 O2S DURING CATALYST MONITOR | ||||||
| P1197 | SLOW 1/2 O2S DURING CATALYST MONITOR | ||||||
| P1281 | ENGINE IS COLD TOO LONG | ||||||
| P1282 | FUEL PUMP RELAY CONTROL CIRCUIT | ||||||
| P1294 | TARGET IDLE NOT REACHED | ||||||
| P1296 | NO 5 VOLTS TO MAP SENSOR | ||||||
| P1297 | NO CHANGE IN MAP FROM START TO RUN | ||||||
| P1388 | ASD RELAY CONTROL CIRCUIT | ||||||
| P1389 | NO ASD RELAY OUTPUT VOLTAGE AT PCM | ||||||
| P1391 | INTERMITTENT LOSS OF CKP OR CMP | ||||||
| P1398 | MISFIRE ADAPTIVE NUMERATOR AT LIMIT | ||||||
| P1486 | EVAP LEAK MON PINCHED HOSE FOUND | ||||||
| P1491 | RADIATOR FAN CONTROL RELAY CIRCUIT | ||||||
| P1492 | BTS VOLTAGE TOO HIGH | ||||||
| P1493 | BTS VOLTAGE TOO LOW | ||||||
| P1494 | LEAK DETECTION PUMP SW OR MECH FAULT | ||||||
| P1495 | LEAK DETECTION PUMP SOLENOID CIRCUIT | ||||||
| P1594 | CHARGING SYSTEM VOLTAGE TOO HIGH | ||||||
| P1595 (3) | SPEED CONTROL SOLENOID CIRCUITS | ||||||
| P1596 (3) | SPEED CONTROL SWITCH ALWAYS HIGH | ||||||
| P1597 (3) | SPEED CONTROL SWITCH ALWAYS LOW | ||||||
| P1682 | CHARGING SYSTEM VOLTAGE TOO LOW | ||||||
| P1683 (3) | SPEED CONTROL POWER RELAY CIRCUIT | ||||||
| P1685 | INVALID SKIM KEY | ||||||
| P1686 | NO SKIM MESSAGE RECEIVED | ||||||
| P1687 | NO MIC MESSAGE RECEIVED | ||||||
| P1695 | NO CCD MESSAGE FROM BCM | ||||||
| P1696 | PCM FAILURE EEPROM WRITE DENIED | ||||||
| P1697 | PCM FAILURE SRI MILE NOT STORED | ||||||
| P1698 | NO CCD MESSAGE FROM TCM | ||||||
| P1756 (2) | GOV PRESS NOT EQUAL TO TARGET @ 15-20 PSI | ||||||
| P1757 (2) | GOV PRESS ABOVE 3 PSI IN GEAR WITH 0 MPH | ||||||
| P1762 (2) | GOV PRESS SEN OFFSET VOLTS TOO LOW OR HIGH | ||||||
| P1763 (2) | GOVERNOR PRESSURE SENSOR VOLTS TOO HIGH | ||||||
| P1764 (2) | GOVERNOR PRESSURE SENSOR VOLTS TOO LOW | ||||||
| P1765 (2) | TRANS 12 VOLT SUPPLY RELAY CONTROL CIRCUIT | ||||||
| P1899 (2) | P/N SWITCH STUCK IN PARK OR IN GEAR | ||||||
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RENDER: 1.0x
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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.