I looked through all the previous threads on this forum regarding P0420 and the catalyst system.
My particular problem was a loss of power for about 10 seconds, not complete loss, but very rough, during the loss the service light was blinking.
Everything was fine after that (4WD active, in snow, very cold 15 F degrees).
The light did NOT remain on.. it turned off immediately when normal operating conditions resumed. However, a few days later I did plug in my code reader and saw the stored "P0420".
I've read about the ECM updates with the TSB, and front or rear catalytic converter replacements.
The major questions I have, all the threads mentioned the light and code, but no one mentioned if they experienced any engine issues prior/during with the light?
Does this scenario change anything? I read one other post on a different forum that mentioned a bad ignition coil.
Lastly, a few weeks ago at about 85,000 miles the SES light came on twice, both times my code reader just said "CHECK SERVICE BOOKS"? It didn't have any P code. I cleared it. The light came back on a day later, but my reader said "No active codes" - the "CHECK SERVICE BOOKS" code was stored. This was not accompanied by any problems. I reset the light again and it has been a couple weeks with no problems until now.
I apologize for the lengthy post, but I wanted to be thorough, and hopefully fill in the blanks for anyone else who has this problem in the future.
Any help, as always, is greatly appreciated.
Thanks,
Justin
My particular problem was a loss of power for about 10 seconds, not complete loss, but very rough, during the loss the service light was blinking.
Everything was fine after that (4WD active, in snow, very cold 15 F degrees).
The light did NOT remain on.. it turned off immediately when normal operating conditions resumed. However, a few days later I did plug in my code reader and saw the stored "P0420".
I've read about the ECM updates with the TSB, and front or rear catalytic converter replacements.
The major questions I have, all the threads mentioned the light and code, but no one mentioned if they experienced any engine issues prior/during with the light?
Does this scenario change anything? I read one other post on a different forum that mentioned a bad ignition coil.
Lastly, a few weeks ago at about 85,000 miles the SES light came on twice, both times my code reader just said "CHECK SERVICE BOOKS"? It didn't have any P code. I cleared it. The light came back on a day later, but my reader said "No active codes" - the "CHECK SERVICE BOOKS" code was stored. This was not accompanied by any problems. I reset the light again and it has been a couple weeks with no problems until now.
I apologize for the lengthy post, but I wanted to be thorough, and hopefully fill in the blanks for anyone else who has this problem in the future.
Any help, as always, is greatly appreciated.
Thanks,
Justin