P0138 Diagnostic Trouble Code Discussion for July 2009
Heated Oxygen Sensor (Bank 1 Sensor 2) Circuit High Voltage
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| Help Request | Posted | |
| 2009 Dodge Ram 1500 ST 4.7L Surge, MIL Lamp on VIN: 1D3HV18P69 P0138: 1/2. Drivability concern comes & goes,but 02 codes are staying active every time till vehicle is shut down.Downstream 02s are now staying around 4.8 V.(5v) biased sensors).All code charts produce the exspected results.Have run redundant wires w/ no change.Just ... |
July 06, 2009 | |
| 1998 Porsche Boxster 2.5L Poor Idle Quality, MIL Lamp on VIN: WPOCA298XW P0138: Short Circuit to Plus. I have a Boxter with 4 o2s codes PO131,PO137,PO151,PO157 all reading low voltage. I disconnected all o2s and ohmed them out. My result on those were all read OFL. According to alldata they test good. Then I tested then ecm and wiring harness. I checked voltage... |
July 20, 2009 | |
| 1998 Porsche Boxster 2.5L Poor Idle Quality, MIL Lamp on VIN: WPOCA298XW P0138: Short Circuit to Plus. I have a Boxter with 4 o2s codes PO131,PO137,PO151,PO157 all reading low voltage. I disconnected all o2s and ohmed them out. My result on those were all read OFL. According to alldata they test good. Then I tested then ecm and wiring harness. I checked voltage... |
July 22, 2009 |
