Code p1157

[ATrom]

P1157 Lack of Downstream Heated Oxygen Sensor Switch - Sensor Indicates Lean - Bank No. 2

It says 'Bank No. 2' is that which o2 sensor it is? Which one is number 2?

 

[FASTLLS]

Driver's side I think..

 

[joegr]

Yes, driver's side.

 

[FASTLLS]

Feeling smart tonight.. :lol:

Probably won't last though.. haha

 

[ATrom]

haha I bet you are..

ok and with this code my car is giving. What are the possible problems causing this? What should I check for?

 

[joegr]

haha I bet you are..

ok and with this code my car is giving. What are the possible problems causing this? What should I check for?

Bank 2 sensor 2 bad.
Wiring bad.
Cat bad.
Bank 2 sensor 1 bad.

Long shots...

One or more marginal COPs on bank 2.
Dirty MAF.
Bad/dirty injector(s) on bank 2.
PCM fault.

 

[ATrom]

Bank 2 sensor 2 bad.
Wiring bad.
Cat bad.
Bank 2 sensor 1 bad.

Long shots...

One or more marginal COPs on bank 2.
Dirty MAF.
Bad/dirty injector(s) on bank 2.
PCM fault.

Could this be linked to a bad Ignition Coil? Is the downstream o2 before or after the CAT? When you say bank 2 sensor 1 or 2 are you referring to the two o2's on that side?
Thanks in advance, you have been answering most of my questions here!

 

[joegr]

Could this be linked to a bad Ignition Coil? Is the downstream o2 before or after the CAT? When you say bank 2 sensor 1 or 2 are you referring to the two o2's on that side?
Thanks in advance, you have been answering most of my questions here!

Marginal COP = bad ignition coil. (COP = Coil On Plug)

Sensor 2, or the downstream sensor is the one after the catalytic converter.
Sensor 1 is the one nearest the engine.
Bank 2 means anything on the driver's side that is related to the driver's side cylinders (4 to 8).