Trac stumbles when first started codes P1131 & P1151

[michael b]

Any ideas? Thanks

 

[Dre L]

P1131 Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Lean - Bank No. 1

P1151 Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Lean - Bank No. 2



Check the thread below. This elbow is popular for lean banks, you might luck out.

 

[Tom Higbee]

Be sure to take the elbow off to inspect!! I had the same problem, checked the elbow but didn't take it off....after many more days of trying to find out what was wrong, I went back and pulled off the elbow!! Cracked on the bottom!!!