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2003 Jeep Grand Cherokee Laredo 4.0L MIL Lamp on
Posted to Chrysler Driveability on 2/9/2009 10 Replies

I have scanned this unit and found the front O2 B1/1 does not respond as fast as the rear B2/1. Voltage on both start at 4.98 the rear drops to .05 within about 5sec. The front takes about 1 minute. I have checked for voltage to the heater has 12volts when act...

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  Related Documents & Media  2003 Jeep Grand Cherokee Laredo

 
Message Closed w/FIX

car Vehicle Data

2003 Jeep Grand Cherokee Laredo

VIN 1J4GW48S53
Engine4.0 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsMIL Lamp On

Trouble Codes

P0132Heated Oxygen Sensor (Bank 1 Sensor 1) Circuit High Voltage
P0135Heated Oxygen Sensor (Bank 1 Sensor 1) Heater Circuit Malfunction
Message Closed w/FIX

car Vehicle Data

2003 Jeep Grand Cherokee Laredo

VIN 1J4GW48S53
Engine4.0 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsMIL Lamp On

Trouble Codes

P0132Heated Oxygen Sensor (Bank 1 Sensor 1) Circuit High Voltage
P0135Heated Oxygen Sensor (Bank 1 Sensor 1) Heater Circuit Malfunction