Originally Posted by bear1
I have a 97 tbird. 3.8 eng. with 138k miles.
I have had cat. converters replaced all 3 (ca.).
Two sensors replaced up/down stream left bank (driver side). Now I am getting the following codes. P1151,P0156 &P0161. Could any one help with the problem.I have looked at the simple stuff fuse vacum leak ect.
P1151 is Right Upstream O2 sensor not switching. P0161 is related to the Left Downstream O2 sensor heater. P0156 is related to the Left Downstream O2 sensor voltage being low. You at least have a bad or aged Right upstream and possibly a wiring issue with the Let downstream O2 sensor, which you replaced.