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1995 Chevrolet Blazer 4.3L MIL Lamp on
Posted to GM Driveability on 7/29/2004 8 Replies

After replace Cat and Muffler looked at code P0138 on scanner. Rear o2 sensor bias voltage is over 1 volt when ignition first turned on, drops to .400 after couple minutes while o2 heater warms up. Will not drop any farther.

Front o2 sensor bias voltage on s...

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  Related Documents & Media  1995 Chevrolet Blazer

 
Message Closed w/FIX

car Vehicle Data

1995 Chevrolet Blazer

VIN 1GNDT13WXS
Engine4.3 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
OccursAlways

Trouble Codes

P0138Heated Oxygen Sensor (Bank 1 Sensor 2) Circuit High Voltage
Message Closed w/FIX

car Vehicle Data

1995 Chevrolet Blazer

VIN 1GNDT13WXS
Engine4.3 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
OccursAlways

Trouble Codes

P0138Heated Oxygen Sensor (Bank 1 Sensor 2) Circuit High Voltage