Join Now
International Automotive Technicians Network

P0156 Diagnostic Trouble Code Discussion for September 2014

Heated Oxygen Sensor (Bank 2 Sensor 2) Closed Loop Fuel Control

Note: This is a professional automotive technician's resource.
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.

Trouble Ticket Help Requests for DTC P0156
Help Request Posted
1999 Ford Expedition Eddie Bauer 5.4L Poor Idle Quality VIN: 1FMPU18L4X
P0156: bank2 Sensor2. ... idle check engine light on, found codes PO156 B2S2 fault, P1151 B2S1 indicates lean. thought no brainer lean Ford probably PCV elbows, not the case. Fuel trims at idle -12 both banks, bank 1 O2 staying at 0-50, bank 2 switching, with propane enrichment bot...
September 18, 2014
2004 Toyota 4Runner Sport 4.0L vsc light on VIN: JTEBU14R64
P0156: Heated Oxygen Sensor (Bank 2 Sensor 2) Circuit Malfunction. As stated in repair history replaced o2 sensor and cleared code and all is well, i thought! cel has not returned but vsc and traction off lights still on.Using a generic scan tool to clear code with. Customer is a good friend and says lights came on when cel c...
September 23, 2014