
1995 Chevrolet Blazer 4.3L MIL Lamp on
Greetings, techs, this blazer intermittantly sets p0138 - b1s2 o2 voltage high. The test tree in MOD has you check o2 for operation. Then you jumper o2 sensor high and low wires on ecm side and look for reading ( 35 mv. Got a reading of 18 mv. Tree then direct...
FIX posted 1/14/2005
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Message Closed w/FIX
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VIN | 1GNDT13W1S |
Engine | 4.3 L / 6 cyl / GAS |
Trans | 4-speed Automatic (Electronic) |
Delivery | FI / cpi |
Emissions | Not OBD-II Compliant |
Symptoms | MIL Lamp On |
Occurs | Intermittently |
Misc. | Blazer |
Trouble Codes
P0138 | Heated Oxygen Sensor (Bank 1 Sensor 2) Circuit High Voltage |
Message Closed w/FIX
Vehicle Data
1995 Chevrolet Blazer
VIN | 1GNDT13W1S |
Engine | 4.3 L / 6 cyl / GAS |
Trans | 4-speed Automatic (Electronic) |
Delivery | FI / cpi |
Emissions | Not OBD-II Compliant |
Symptoms | MIL Lamp On |
Occurs | Intermittently |
Misc. | Blazer |
Trouble Codes
P0138 | Heated Oxygen Sensor (Bank 1 Sensor 2) Circuit High Voltage |