I could use your insight and help.
2000 Camry CE, 5 Speed Manual trans with 186,000 on the clock. This car runs great and I want to keep it.
Just got the P04020 code, Catalyst system efficiency below threshold Bank 1.
Spent a few hours online researching this and seems like my initial options are:
- A gallon of lacquer thinner in a quarter tank of gas (or any commercial product)
- Replace the downstream O2 sensor
- Take off the catalytic converter and wash in soapy water
Am I on the right track?
Please let me know your thoughts on how to deal with this.
Thank you for your time.