P0138 Diagnostic Trouble Code Discussion for July 2019
Heated Oxygen Sensor (Bank 1 Sensor 2) Circuit High Voltage
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| Help Request | Posted | |
| 2010 Kia Forte EX 2.0L MIL Lamp on VIN: KNAFU4A27A P0138: High Voltage B1 S2 Downstream. System will set high voltage code when warm at idle. 02 reacts normal with engine running. When we have koeo the 02 voltage climbs beyond the threshhold of 1.2 volts, at start up voltage comes down to normal. With sensor disconnected, we measure 1.8-2.0 vo... |
July 15, 2019 |
