Content .. 520 521 522 523 ..

Jeep XJ. Manual - part 522

(M)

Malfunction Indicator Lamp (MIL) illuminated during engine operation if this DTC was

recorded (depending if required by CARB and/or EPA). MIL is displayed as an engine icon on

instrument panel.

P0131 (M)

1/1 O2 Sensor Shorted To Ground

Oxygen sensor input voltage maintained below normal

operating range.

P0132 (M)

1/1 O2 Sensor Shorted To Voltage

Oxygen sensor input voltage maintained above normal

operating range.

P0133 (M)

1/1 O2 Sensor Slow Response

Oxygen sensor response slower than minimum required

switching frequency.

P0134 (M)

1/1 O2 Sensor Stays at Center

Neither rich or lean condition is detected from the oxygen

sensor input.

P0135 (M)

1/1 O2 Sensor Heater Failure

Oxygen sensor heater element malfunction.

P0136 (M)

1/2 O2 Sensor Heater Circuit

Malfunction

Oxygen sensor heater element malfunction.

P0137 (M)

1/2 O2 Sensor Shorted To Ground

Oxygen sensor input voltage maintained below normal

operating range.

P0138 (M)

1/2 O2 Sensor Shorted To Voltage

Oxygen sensor input voltage maintained above normal

operating range.

P0139 (M)

1/2 O2 Sensor Slow Response

Oxygen sensor response not as expected.

P0140 (M)

1/2 O2 Sensor Stays at Center

Neither rich or lean condition is detected from the oxygen

sensor.

P0141 (M)

1/2 O2 Sensor Heater Failure

Oxygen sensor heater element malfunction.

P0143 (M)

1/3 O2 Sensor Shorted To Ground

Oxygen sensor input voltage maintained below normal

operating range.

P0144 (M)

1/3 O2 Sensor Shorted To Voltage

Oxygen sensor input voltage maintained above normal

operating range.

P0145 (M)

1/3 O2 Sensor Slow Response

Oxygen sensor response slower than minimum required

switching frequency.

P0146 (M)

1/3 O2 Sensor Stays at Center

Neither rich or lean condition is detected from the oxygen

sensor.

P0147 (M)

1/3 O2 Sensor Heater Failure

Oxygen sensor heater element malfunction.

P0151 (M)

2/1 O2 Sensor Shorted To Ground

Oxygen sensor input voltage maintained below normal

operating range.

P0152 (M)

2/1 O2 Sensor Shorted To Voltage

Oxygen sensor input voltage sustained above normal

operating range.

P0153 (M)

2/1 O2 Sensor Slow Response

Oxygen sensor response slower than minimum required

switching frequency.

P0154 (M)

2/1 O2 Sensor Stays at Center

Neither rich or lean condition is detected from the oxygen

sensor.

P0155 (M)

2/1 O2 Sensor Heater Failure

Oxygen sensor heater element malfunction.

P0157 (M)

2/2 O2 Sensor Shorted To Ground

Oxygen sensor input voltage maintained below normal

operating range.

P0158 (M)

2/2 O2 Sensor Shorted To Voltage

Oxygen sensor input voltage maintained above normal

operating range.

P0159

2/2 O2 Sensor Slow Response

Oxygen sensor response slower than minimum required

switching frequency.

P0160 (M)

2/2 O2 Sensor Stays at Center

Neither rich or lean condition is detected from the oxygen

sensor.

25 - 4

EMISSION CONTROL SYSTEMS

DESCRIPTION AND OPERATION (Continued)

(M)

Malfunction Indicator Lamp (MIL) illuminated during engine operation if this DTC was

recorded (depending if required by CARB and/or EPA). MIL is displayed as an engine icon on

instrument panel.

P0161 (M)

2/2 O2 Sensor Heater Failure

Oxygen sensor heater element malfunction.

P0168

Decreased Engine Performance Due

To High Injection Pump Fuel Temp

Fuel temperature is above the engine protection limit.

Engine power will be derated.

P0171 (M)

1/1 Fuel System Lean

A lean air/fuel mixture has been indicated by an

abnormally rich correction factor.

P0172 (M)

1/1 Fuel System Rich

A rich air/fuel mixture has been indicated by an

abnormally lean correction factor.

P0174 (M)

2/1 Fuel System Lean

A lean air/fuel mixture has been indicated by an

abnormally rich correction factor.

P0175 (M)

2/1 Fuel System Rich

A rich air/fuel mixture has been indicated by an

abnormally lean correction factor.

P0176

Loss of Flex Fuel Calibration Signal

No calibration voltage present from flex fuel sensor.

P0177

Water In Fuel

Excess water found in fuel by water-in-fuel sensor.

P0178

Flex Fuel Sensor Volts Too Low

Flex fuel sensor input below minimum acceptable voltage.

P0178

Water In Fuel Sensor Voltage Too

Low

Loss of water-in-fuel circuit or sensor.

P0179

Flex Fuel Sensor Volts Too High

Flex fuel sensor input above maximum acceptable

voltage.

P0181

Fuel Injection Pump Failure

Low power, engine derated, or engine stops.

P0182 (M)

CNG Temp Sensor Voltage Too Low

Compressed natural gas temperature sensor voltage

below acceptable voltage.

P0183 (M)

CNG Temp Sensor Voltage Too High

Compressed natural gas temperature sensor voltage

above acceptable voltage.

P0201 (M)

Injector #1 Control Circuit

An open or shorted condition detected in control circuit for

injector #1 or the INJ 1 injector bank.

P0202 (M)

Injector #2 Control Circuit

An open or shorted condition detected in control circuit for

injector #2 or the INJ 2 injector bank.

P0203 (M)

Injector #3 Control Circuit

An open or shorted condition detected in control circuit for

injector #3 or the INJ 3 injector bank.

P0204 (M)

Injector #4 Control Circuit

Injector #4 or INJ 4 injector bank output driver stage does

not respond properly to the control signal.

P0205 (M)

Injector #5 Control Circuit

Injector #5 output driver stage does not respond properly

to the control signal.

P0206 (M)

Injector #6 Control Circuit

Injector #6 output driver stage does not respond properly

to the control signal.

P0207 (M)

Injector #7 Control Circuit

Injector #7 output driver stage does not respond properly

to the control signal.

P0208 (M)

Injector #8 Control Circuit

Injector #8 output driver stage does not respond properly

to the control signal.

P0209 (M)

Injector #9 Control Circuit

Injector #9 output driver stage does not respond properly

to the control signal.

P0210 (M)

Injector #10 Control Circuit

Injector #10 output driver stage does not respond properly

to the control signal.

P0215

Fuel Injection Pump Control Circuit

Failure in fuel pump relay control circuit.

EMISSION CONTROL SYSTEMS

25 - 5

DESCRIPTION AND OPERATION (Continued)

(M)

Malfunction Indicator Lamp (MIL) illuminated during engine operation if this DTC was

recorded (depending if required by CARB and/or EPA). MIL is displayed as an engine icon on

instrument panel.

P0216 (M)

Fuel Injection Pump Timing Failure

High fuel supply restriction, low fuel pressure or possible

wrong or incorrectly installed pump keyway.

P0217

Decreased Engine Performance Due

To Engine Overheat Condition

Engine overheating. ECM will derate engine performance.

P0219

Crankshaft Position Sensor

Overspeed Signal

Engine has exceeded rpm limits.

P0222 (M)

Idle Validation Signals Both Low

Problem detected with idle validation circuits within APPS.

P0223 (M)

Idle Validation Signals Both High

(Above 5 Volts)

Problem detected with idle validation circuits within APPS.

P0230

Transfer Pump (Lift Pump) Circuit

Out of Range

Problem detected in fuel transfer pump circuits.

P0232

Fuel Shutoff Signal Voltage Too High

Fuel shut-off signal voltage too high from ECM to fuel

injection pump.

P0234 (M)

Turbo Boost Limit Exceeded

Problem detected in turbocharger wastegate.

P0236 (M)

Map Sensor Too High Too Long

Problem detected in turbocharger wastegate.

P0237 (M)

Map Sensor Voltage Too Low

MAP sensor voltage input below the minimum acceptable

voltage.

P0238 (M)

Map Sensor Voltage Too High

MAP sensor voltage input above the maximum

acceptable voltage.

P0251 (M)

Fuel Inj. Pump Mech. Failure Fuel

Valve Feedback Circuit

Problem sensed with fuel circuit internal to fuel injection

pump.

P0253 (M)

Fuel Injection Pump Fuel Valve

Open Circuit

Problem sensed with fuel circuit internal to fuel injection

pump.

P0254

Fuel Injection Pump Fuel Valve

Current Too High

Problem caused by internal fuel injection pump failure.

P0300 (M)

Multiple Cylinder Mis-fire

Misfire detected in multiple cylinders.

P0301 (M)

CYLINDER #1 MISFIRE

Misfire detected in cylinder #1.

P0302 (M)

CYLINDER #2 MISFIRE

Misfire detected in cylinder #2.

P0303 (M)

CYLINDER #3 MISFIRE

Misfire detected in cylinder #3.

P0304 (M)

CYLINDER #4 MISFIRE

Misfire detected in cylinder #4.

P0305 (M)

CYLINDER #5 MISFIRE

Misfire detected in cylinder #5.

P0306 (M)

CYLINDER #6 MISFIRE

Misfire detected in cylinder #6.

P0307 (M)

CYLINDER #7 MISFIRE

Misfire detected in cylinder #7

P0308 (M)

CYLINDER #8 MISFIRE

Misfire detected in cylinder #8.

P0309 (M)

CYLINDER #9 MISFIRE

Misfire detected in cylinder #9.

P0310 (M)

CYLINDER #10 MISFIRE

Misfire detected in cylinder #10.

P0320 (M)

No Crank Referance Signal at PCM

No reference signal (crankshaft position sensor) detected

during engine cranking.

P0320 (M)

No RPM Signal to PCM (Crankshaft

Position Sensor Signal to JTEC)

A CKP signal has not been detected at the PCM.

P0325

Knock Sensor #1 Circuit

Knock sensor (#1) signal above or below minimum

acceptable threshold voltage at particular engine speeds.

25 - 6

EMISSION CONTROL SYSTEMS

DESCRIPTION AND OPERATION (Continued)

(M)

Malfunction Indicator Lamp (MIL) illuminated during engine operation if this DTC was

recorded (depending if required by CARB and/or EPA). MIL is displayed as an engine icon on

instrument panel.

P0330

Knock Sensor #2 Circuit

Knock sensor (#2) signal above or below minimum

acceptable threshold voltage at particular engine speeds.

P0336 (M)

Crankshaft Position (CKP) Sensor

Signal

Problem with voltage signal from CKP.

P0340 (M)

No Cam Signal At PCM

No fuel sync

P0341 (M)

Camshaft Position (CMP) Sensor

Signal

Problem with voltage signal from CMP.

P0350

Ignition Coil Draws Too Much

Current

A coil (1-5) is drawing too much current.

P0351 (M)

Ignition Coil # 1 Primary Circuit