Exception in rendering!

Message: window is not defined

ReferenceError: window is not defined
    at new c (/tmp/execjs20161208-85577-1saytlljs:136:3912)
    at m.mountComponent (/tmp/execjs20161208-85577-1saytlljs:47:15602)
    at /tmp/execjs20161208-85577-1saytlljs:49:31860
    at a.r.perform (/tmp/execjs20161208-85577-1saytlljs:47:12503)
    at Object.a [as renderToString] (/tmp/execjs20161208-85577-1saytlljs:49:31821)
    at r (/tmp/execjs20161208-85577-1saytlljs:50:21164)
    at Object.S.ReactOnRails.serverRenderReactComponent (/tmp/execjs20161208-85577-1saytlljs:32:6073)
    at eval (eval at <anonymous> (/tmp/execjs20161208-85577-1saytlljs:173:8), <anonymous>:10:23)
    at eval (eval at <anonymous> (/tmp/execjs20161208-85577-1saytlljs:173:8), <anonymous>:17:3)
    at /tmp/execjs20161208-85577-1saytlljs:173:8

Q: Check engine light code P0420

asked by on

my check engine light came on after I filled gas. I got the code read and it was the code P0420 for catalytic converter. However, after I drove it a couple times the light went off. I filled gas, it went back on and as before after driving a couple times it went off. Why would it be going on and off if there was a problem?

My car has 65000 miles.
My car has an automatic transmission.

A: You may have a purge valve that is leaking ...

You may have a purge valve that is leaking and causing excessive fumes to enter the intake manifold during the refuel process. When you start the vehicle, the excessive rich mixture may be causing the catalyst to overheat which will trigger the P0420 code. This will happen if, after a couple of starts, the computer does not see a problem and clears the code.

I'd recommend seeking some assistance from a certified mechanic who can diagnose your Check Engine Light first hand and fix the problem accordingly.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Camshaft Position Sensor

Hello, thanks for writing in about your Dodge Challenger. From what you've described it sounds like you may have a different sensor than what the auto parts store has listed. If you go to the dealer you would be able...

Q: My coolant system continues to build pressure

It may be that you have a head gasket leaking combustion pressure into the cooling system causing pressure to build up there. In order to check for the blown head gaskets, you will first need to have the cooling system...

Q: My car feels like the tires aren't really gripping the pavement

Hello. You are likely experiencing a suspension failure of some type. The steering and suspension components are very closely related. These will interact and effect each other greatly. Due to your symptoms including excess bounce, you should start by looking...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.