How long must I drive after new battery and gas cap to pass smog test?

Asked by Apr 04, 2017 at 01:20 AM about the 2004 Toyota Camry CE

Question type: Maintenance & Repair

I recently relocated my 2004 Toyota Camry from California to Nevada. In
order to register my car in Nevada, it was necessary to pass a smog
inspection. I took my car to Firestone and did not pass. I later learned that
my car failed the smog test because I just installed a new battery and need
to drive the car for approximately 100 miles for the computer to calibrate. I
followed the advice of several YouTube videos and drove the car about 150
miles. On the very day I planned to retake the smog inspection, my check
engine light came on. I took the car to AutoZone because they offer a free
check engine light inspection. AutoZone said that I needed a new gas cap.
I checked my gas cap and the seal was cracked. Before purchasing from
AutoZone, I searched online reviews - two Camry owners said the same
thing happened to them, but the gas cap from AutoZone did not work. Both
guys replaced the AutoZone cap with an OEM Delco cap and the engine
light went off and stayed off.

When I returned to AutoZone to buy the cap, I requested an OEM cap and
explained why. The AutoZone guy informed me that they do not carry OEM
caps and that I would have to purchase an OEM from a Toyota dealership.
The AZ guy added that the only reason the other guy’s caps did not work
was because it was necessary to drive the car 60 miles before the check
engine light would turn off.
That said, I went ahead and purchased the “stock” cap from AutoZone,
drove over 75 miles and this did not remedy the situation. I eventually
purchased an OEM cap, but my engine light is still on. I haven’t driven 60
miles yet, but I am starting to wonder if I should reset the engine light by
disconnecting the battery. If I do, I will have to start all over with
recalibrating the computer. I only have 7 days left on my temporary moving
permit and won’t be allowed another extension at the $2 for 10-days rate.
My next temp moving permit will cost me $9 per day – yikes!
I am looking for some seriously sound advice on the best course of action.

5 Answers

28,715

dont remove power from the system...should be close to reset..some take much more time and miles...they like a steady 15 mile trip..have the codes rescanned again ..it cant hurt

835

It depends from just a few miles to 50. Sometimes more. There is a procedure for this on the internet how to drive the car to make it ready for the smog

835

Also, you coild post the error code. The guys at autozone are just sellers and maybe offer a hint, but are not certified techs. I think he just read the code and offered the usual solution or the easiest. By any chance did you filled the tank before this error occured? Maybe try to reset tne error, but this means you have to drive it some more to make it smoke check ready.

4,655

you need to know what the code is , you've already learned not to buy cheap parts , the gas cap may well have solved the one code but a different one may be up now , you don't know , then there's the "smog test " which I understand as the actual testing (sniffing )of the exhaust which is separate from when codes have been purged from the ECM. First get the codes cleared then the exhaust can be checked .The catalytic converter takes care of a majority of pollutants . Let us know what happens .

78,055

If that code does not clear up driving a 100 miles or more, you have a small EVAP leak, and a smoke test would need to be performed to find it. I'd quit messing around with the gas cap and get it into a good shop to have the EVAP system checked out. But you probably should drive it a bit more to see if the gas cap was the problem. When codes are set, and you get them repaired and cleared there is a minimum amount of miles you need to drive the vehicle, usually over 100 miles. When the car goes to inspection, their scanner can tell when the last time in miles when the codes were cleared, and tell you to come back if the required miles have not ben driven. So you need to getter fixed.

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