I have a 2010 Enclave CXL with 115000 miles and my CEL came on 25 days before my Cali registration is due with a mandatory Star Smog check.
The code was P2099 which i believed to be bank 2 downstream O2 sensor, so i swapped the bank 1 and 2 O2 sensors to confirm this diagnosis, cleared the code and started the 200 mile drive cycle. Im 180 miles into that cycle and the permanent evap code cleared but i now have a pending P0496 purge valve.
Are these unrelated and coincidental or is something else going on? Im down to 15 days to fix this before Smog/registration should i just replace the O2 sensors and the purge valve and cross my fingers?
thank you in advance.
The code was P2099 which i believed to be bank 2 downstream O2 sensor, so i swapped the bank 1 and 2 O2 sensors to confirm this diagnosis, cleared the code and started the 200 mile drive cycle. Im 180 miles into that cycle and the permanent evap code cleared but i now have a pending P0496 purge valve.
Are these unrelated and coincidental or is something else going on? Im down to 15 days to fix this before Smog/registration should i just replace the O2 sensors and the purge valve and cross my fingers?
thank you in advance.
