Car Questions
RepairPal is your advocate for car care advice and guidance

P0420 code catalyst system efficiency below threshold bank 1

(2000 Toyota Sienna)
in Revere, MA on March 09, 2012
Replace the bottom cat twice how can I find out if the cat or if it the 02's ?????????????????? help
RepairPal estimates are guaranteed at over 2,000 quality certified locations nationwide. Learn more

Similar Questions

View answers to similar questions from RepairPal's community of auto experts and enthusiasts.
The only way it will start is if you hold the gas all the way down & then it dies. I have replaced the camshaft senso...
Six months ago the service engine light came on my Altima. The code read was P0420, catalyst system efficiency below ...
Didn't find what you were looking for?