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O2 Sensor Codes listed

scrollmaster

New Member
Joined
July 4, 2008
Messages
1
Reaction score
0
City, State
Northeast Louisiana
Year, Model & Trim Level
97 Explorer XLT 4.0L SOHC
97 Automatic 4.0 SOHC 168,700+ miles. Had exhaust pipes, mufflers and catalytic converters replaced about year ago. They also replaced the 2 O2 sensors that were easy to reach.

I'm Getting 5 DTC errors...
P0135, P0141,P0155, P0161 - All giving Heater Circuit Malfunction with related Bank and Sensor location.
P0156 - Sensor Circuit Malfunction Bank 2 Sensor 2

What are your reccomendations
 




bobflood

Elite Explorer
Joined
May 27, 2010
Messages
1,577
Reaction score
26
City, State
Powder Springs, GA
Year, Model & Trim Level
1997 Eddie Bauer V8 2WD
97 Automatic 4.0 SOHC 168,700+ miles. Had exhaust pipes, mufflers and catalytic converters replaced about year ago. They also replaced the 2 O2 sensors that were easy to reach.

I'm Getting 5 DTC errors...
P0135, P0141,P0155, P0161 - All giving Heater Circuit Malfunction with related Bank and Sensor location.
P0156 - Sensor Circuit Malfunction Bank 2 Sensor 2

What are your reccomendations

If you are getting Heater Circuit codes for all four O2 sensors, I would look to a fuse first - pretty sure one fuse runs all four heater circuits. Re the P0156 - Bank 2 Sensor 2 is Driver's side behind the cat. Was that sensor replaced last time?? Check that the wiring is OK - it might have gotten misrouted when exhaust work was done.
 




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