Toyota Camry Check Engine Light Fixed!

After moving to Washington state, our 2000 Toyota Camry CE failed it’s emissions test. The reason was that the car’s check engine light was illuminated and the CEL (check engine light) codes P0440, P0441 and P0446 were present.

These fault codes indicate problems with the evap system. This was bad news.

Here is the summary of how I finally fixed the issue and some lessons that I learned which might save you time and money.

1) Replaced gas cap with a genuine Toyota gas cap for our model and cleared fault codes. Specifically this is one: Genuine Toyota (77310-48020) Fuel Tank Cap Assembly

RESULT => Same diagnostic codes reappeared within a day.

2) I replaced the entire evap canister. Based on a youtube video I found – this was indicated to be the most common cause of these failure. The canister was about 250 dollars (ouch). Wasn’t too difficult to replace but helped to have jack stands to elevate the entire car. Also had to drop the exhaust to wiggle it out. It took about two hours from start to finish. Not as bad as people make it sound.

Here is the evap canister I bought for our model: Genuine Toyota 77740-06170 Charcoal Canister Assembly

Note: Amazon site said it wouldn’t fit my model car – but it’s correct – their site is wrong.

RESULT => Same diagnostic codes reappeared within a day.

3) Bought this vacuum pump
Amzdeal Brake Bleeder Vacuum Pump Kit Tools

and this VSV (vacuum switching valve)

Dorman 911-606 Toyota Avalon/Camry/ES3300 Vacuum Switching Valve

RESULT => Same diagnostic codes reappeared within a day.

I finally determined that the underlying cause of these codes was a bad seal on the gas cap!

2 thoughts on “Toyota Camry Check Engine Light Fixed!”

  1. I’m having the same problem with my 02 Toyota Camry LE. Same 3 codes appear. I’ve already replaced the air intake vsv, the purge valve, and a new gas cap (not a Toyota brand though). Yet the same codes still keep appearing. I’m planning on buying the charcoal canister as a last resort.

    But thank you for the info you posted here, it gives me the sense that I’m heading in the right direction 🙂

    1. Louie,

      I wish in hindsight that I had waited until the very last thing to replace the charcoal canister. It is expensive, and was a difficult component to reach / replace. Good luck.

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