Catalyst converter replacement helped and did not solve the P0420 or P0421 error code at all. After only 5 miles, the engine light came on in the dashboard and the OBDII diagnostic unit from Icarsoft shows the same error that the catalyst is not cleaning effectively.
After all the troubleshooting and research on the car's documentation that pointed to a catalytic converter replacement, it was a failure. That check engine light is so annoying when it lights up on the dashboard display.
Yes, what should we do now? yes, don't give up anyway. We have to take new steps and try to find where the error occurs.
I don't know at all when the last owner did a service so I thought we should try this first. We are going to replace the spark plugs, air filter, oil and oil filter on this Volvo V70 model year 2006. In general, the car does not run strangely, it is not noticeable that this error code is in the system and therefore it is difficult to know where to start troubleshooting. If I really have to think of something wrong, it can sometimes feel like a jolt when it's a little cold and you're driving at around 50km/h, but this little jolt can also occur on the highway. No, it's actually very difficult to focus on a place to dig.
In a bit of research online, I read that someone has solved these error codes with new ignition coils, so we will take this and change it at the same time as I do this service.
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The two previous videos we made about this error code P0420 can be found here. The link to episode 1 where we do a troubleshooting and dig into the car's documentation as well as take the temperature of the catalytic converter and read the car's oxygen sensor can be found here.
• Felkod P0420 eller ECM...
Episode 2 about the error code P0420 where we replace the catalytic converter and where we compare the new and old cat can be found at this link. At the end of this episode, we see on the diagnosis unit that the oxygen sensor output on Bank 1 sensor 2 is not quite good after the catalyst change. There is a ton of useful information in these 2 early sections about this P0420 error code. You can find episode 2 here.
• Del 2 Felkod P0420 ell...
If you want more guides and manuals for your Volvo, there is a lot of that on the forum
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Here we go !.
15 май 2024
