P0138 Diagnostic Trouble Code Discussion for October 2009
Heated Oxygen Sensor (Bank 1 Sensor 2) Circuit High Voltage
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| Help Request | Posted | |
| 1998 Jeep Grand Cherokee Laredo 4.0L MIL Lamp on VIN: 1J4GZ58S0W P0138: Heated Oxygen Sensor (Bank 1 Sensor 2) Circuit High Voltage. ... shop Saturday and tried to sort out what’s going on with the downstream O2 sensor (Fed emissions, only 2 sensors). Code is P0138, high voltage sensor 1-2. Sensor reading is off scale on the scan tool, and reading about 4.9 volts KOER. Disconnected the harn... |
October 06, 2009 |
