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2004 Jeep Grand Cherokee Laredo 4.0L MIL Lamp on
After the light is cleared and the vehicle is started the light comes right back on immediately. Hard code. Was told that the PCM might have to be flashed. Not sure though. Also was told there may be a possible short to ground.
FIX posted 3/30/2011
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Message Closed
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14 Replies Received
14 Replies Received
Related Documents & Media | VIN | 1J4GW48SX4 |
| Engine | 4.0 L / 6 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | Fuel Injection |
| Emissions | OBD-II Compliant |
| Symptoms | MIL Lamp On |
| Occurs | Always |
Trouble Codes
| P0031 | Heated Oxygen Sensor (Bank 1 Sensor 1) Heater Circuit Low Voltage |
| P0135 | Heated Oxygen Sensor (Bank 1 Sensor 1) Heater Circuit Malfunction |
Message Closed
Vehicle Data
2004 Jeep Grand Cherokee Laredo
| VIN | 1J4GW48SX4 |
| Engine | 4.0 L / 6 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | Fuel Injection |
| Emissions | OBD-II Compliant |
| Symptoms | MIL Lamp On |
| Occurs | Always |
Trouble Codes
| P0031 | Heated Oxygen Sensor (Bank 1 Sensor 1) Heater Circuit Low Voltage |
| P0135 | Heated Oxygen Sensor (Bank 1 Sensor 1) Heater Circuit Malfunction |
Video