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Replace converter and o2 sensors check engine light came on after 4 days what next to check for code po 420?
Davidbharose
Monitor B1 S2 with scanner that does live data with graphs. Graph for B1 S2 should be almost flat line at .5 volt or more with engine running at 2500 rpm for 10 minutes. If not check for vacuum leaks, exhaust leaks. Year, make, model and engine info would be helpful.
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What is the trouble when the check engine lite is on?
Faulty catalytic converter, or sensors in exhaust faulty
Can a cracked exhaust manifold cause the check engine light to come on?
Yes, it can affect the oxygen sensors and catalytic converter.Yes, it can affect the oxygen sensors and catalytic converter.
O2 sensor problems with Mercury Villager?
If the o2 sensor is bad, replace it. If the sensors are activating the check engine light, then the codes should be checked. The catalytic converter could be blocked or the engine may not be running properly.
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replace the o2 sensors should do it.
Where are 2002 impala 3.8l o2 sensors physically located?
2 sensors. One is on the back of the engine near the wall of the engine compartment. the second one is on the exhaust pipe under the middle of the car near the catalytic converter. if you change both and you still have a check engine code. it may be the catalytic converter that is bad
Where in the check engine sensor located on the engine?
There are sensors all over the engine that can turn the check engine light on.There are sensors all over the engine that can turn the check engine light on.
Check engine light is on steady on your 03 Z71 Tahoe you have replaced the two O2 sensors before the cat conv Light is still on Should you replace the two aft of the converter?
There are pages and pages of things that can cause a check engine light. You need to have it checked with a scantool. Then the code can be diagnosed and repaired.
What is the difference between before and after converter when installing oxygen sensors?
Depends on the vehicle. Sometimes they are all the same. Sometimes the O2 sensors in front of the converter are heated while the rear ones aren't. But the main difference is that the front ones are the ones that effect how the engine runs. The rear ones don't effect how the engine runs. They are only there as a check on the catalytic converter.
How can you reset your o2 sensors on your 2001 Ford 4x4?
You can not reset your oxygen sensors. You can only replace them. To reset the check engine light you will have to get that done by a repair shop with a computor. If replacing the sensors does not repair the problem then check for a vacuum leak.
2000 ford focus se engine light come and you check with the computer its says some thiNg wrong in catalatic converter?
Replace catalytic converter
2001 Pathfinder engine light problem you replaced 2 oxygen sensors then replaced 2 timing sensors the service engine light still on computer shows no code?
Wrong scanner?? If a check engine light is on, there are codes. Timing sensor? Check engine usually means a problem... Service means that scheduled service needs to be performed like oil change, or timing belt replacement. I would Check your Catalytic Converter. What often happens is the catalyst that is in the Catalytic converter Heats up and Blows out into your Muffler. This means It is not the sensor,but your converter and Muffler Need Replaced.I have just fixed two cars with this problem,and they had the same symptoms,Check engine Light.
If you replace the catalytic converter with a straight pipe on a 1998 Honda accord 4 cylinder how do you stop the check engine light from coming on?
You have 2 options. Either you put your catalytic converter back on or you unplug the check engine light. Thanks for killing the environment.
