PCM...Code P0420
Thread Starter
Le Mans Master
Joined: Apr 2002
Posts: 6,927
Likes: 3
From: Glendale NY
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16-'17-'18- '19
PCM...Code P0420
Got a "check engine light".... 1/2 hour after I got the car inspected, lucky it didn't happen on the way to the inspection station.
Looked up the code and it says,"System Low Efficiency Bank 1"
Does this mean my car is getting as tired as I am?
Car only has 188,600 miles on it.
Thanks
Looked up the code and it says,"System Low Efficiency Bank 1"
Does this mean my car is getting as tired as I am?
Car only has 188,600 miles on it.
Thanks
Melting Slicks
Joined: Jun 2004
Posts: 3,439
Likes: 6
From: Newark, DE
St. Jude Donor '06
P0420 is a catalyst system code. Bank 1 is the driver side. The PCM compares the readings between the front O2 sensor (forward of the catalytic converter) and the rear sensor (after the cat). If it doesn't see much difference... "low efficiency." It could be just an exhaust leak, but with 188.6K on the odometer, it's probably a failed converter.
Le Mans Master
Joined: Mar 2004
Posts: 5,562
Likes: 5
From: South East coast Florida
Bobby, you started an epidemic....have Carmen shut off the back 02's 
By the way, long time no hear. How is everything....good we hope. This are cool here, getting ready for Krissy's big day.
See ya soon
Ed
By the way, long time no hear. How is everything....good we hope. This are cool here, getting ready for Krissy's big day.
See ya soon
Ed
Thread Starter
Le Mans Master
Joined: Apr 2002
Posts: 6,927
Likes: 3
From: Glendale NY
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16-'17-'18- '19
Code....
Soup it is....
Everything is good. Hope to see you and Karin soon. Congrats to Krissy
Thread Starter
Le Mans Master
Joined: Apr 2002
Posts: 6,927
Likes: 3
From: Glendale NY
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16-'17-'18- '19
PCM Code
P0420 is a catalyst system code. Bank 1 is the driver side. The PCM compares the readings between the front O2 sensor (forward of the catalytic converter) and the rear sensor (after the cat). If it doesn't see much difference... "low efficiency." It could be just an exhaust leak, but with 188.6K on the odometer, it's probably a failed converter.
