My Lincoln has 65k on it 2wd. Riding real ruff at idle. I took it to Auto Zone to hook it. It came back with P171 & P174 bank 1 and bank 2 bad, it also said that my Master Control air valve. Took it to another shop They said it was 02 sensor. My Lincoln has 4 02 sensor ie I have 2 converts. I changed the driver side set, reset the puter. It still drove ruff. Took it to get put on the puter the same to codes cames up. Now I know that I have a brand new set on one side so why am I getting the 2 same codes. I took it to another place they say it could be the egr valve or the Master Control air valve.
Check engine light part 2
- Thread starter ForgetFul
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