× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network
2004 Jeep Grand Cherokee Laredo 4.0L MIL Lamp on
Posted to Chrysler Driveability on 2/15/2011 14 Replies

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.

14 Replies Received (View Replies)

  Related Documents & Media  2004 Jeep Grand Cherokee Laredo

 
Message Closed

car Vehicle Data

2004 Jeep Grand Cherokee Laredo

VIN 1J4GW48SX4
Engine4.0 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
OccursAlways

Trouble Codes

P0031Heated Oxygen Sensor (Bank 1 Sensor 1) Heater Circuit Low Voltage
P0135Heated Oxygen Sensor (Bank 1 Sensor 1) Heater Circuit Malfunction
Message Closed

car Vehicle Data

2004 Jeep Grand Cherokee Laredo

VIN 1J4GW48SX4
Engine4.0 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
OccursAlways

Trouble Codes

P0031Heated Oxygen Sensor (Bank 1 Sensor 1) Heater Circuit Low Voltage
P0135Heated Oxygen Sensor (Bank 1 Sensor 1) Heater Circuit Malfunction