Can a bad O2 sensor Cause a P0420 code?
Can a bad O2 sensor cause a P0420 code? Yes. A typical catalyst monitor uses the signal from the downstream oxygen sensor to determine catalyst efficiency, and the signal from the upstream sensor is a reference point. As such, failure of either the upstream or downstream oxygen sensor can cause code P0420 to set.
What does P0420 mean on a Saturn?
P0420 SATURN Tech Notes As the code description implies the P0420 code means that the vehicle’s control module has detected that the three-way catalytic converter is not working properly (is not as efficient as the factory is expecting).
Why is my outlook running with a P0420 code?
Hey all, my ’09 Outlook has been running with a P0420 code for quite awhile. Even after I clear it, it returns in pretty short order. It has also been feeling like it lacks some power, and I sometimes get a burning oil type smell, especially when going up hills.
What causes the O2 sensor to show the code po420?
Rich or lean mixtures can damage the catalytic converter, and when the catalytic converter is damaged/filled with fuel, the efficiency will be low, and the rear O2 sensor will see that and show the trigger the code Po420.
What does P0420 mean on a catalytic converter?
As the code description implies the P0420 code means that the vehicle’s control module has detected that the three-way catalytic converter is not working properly (is not as efficient as the factory is expecting).
What to do if your Saturn has a P0420 code?
Replacing the oxygen (O2) sensors may sometimes fix the code, but in most cases the catalytic convert needs to be replaced to fix the problem. If the P0420 code is combined with other codes, try fixing the other codes first. The cost to diagnose the P0420 SATURN code is 1.0 hour of labor.
Hey all, my ’09 Outlook has been running with a P0420 code for quite awhile. Even after I clear it, it returns in pretty short order. It has also been feeling like it lacks some power, and I sometimes get a burning oil type smell, especially when going up hills.
Where is the O2 sensor on the P0420?
Re: P0420 Bank 1 issue. Bank 2, sensor 1.. is the O2 sensor on top- front of engine– that is the one very close to the oil dipsticks. Re: P0420 Bank 1 issue.
As the code description implies the P0420 code means that the vehicle’s control module has detected that the three-way catalytic converter is not working properly (is not as efficient as the factory is expecting).