Low Voltage SES codes
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Low Voltage SES codes
It appears that I am getting low voltage readings from all four O2 sensors on my 98 Z28 A4. I had Autozone do a scan and received the following: PO131, PO137, PO151, PO157. I really doubt all 4 O2 sensors are bad. But maybe. I have had this issue ever since I bought the car a month ago. The SES light is on a majority of the time, but not always.
Any ideas on what causes it to run lean? I have noticed that it does runs little rough and does not seem to be as fast as I would expect from an LS1.
Thanks for any ideas on what to check.
Any ideas on what causes it to run lean? I have noticed that it does runs little rough and does not seem to be as fast as I would expect from an LS1.
Thanks for any ideas on what to check.