PCM...Code P0420
03-01-2008, 02:57 PM
#1
Le Mans Master
Thread Starter
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
03-01-2008, 06:46 PM
#2
Former Vendor
You better take it to the doctor.
The Vette Doctor that is
& bring soup
The Vette Doctor that is
& bring soup
03-01-2008, 07:49 PM
#4
Melting Slicks
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.
03-01-2008, 09:00 PM
#5
Le Mans Master
Member Since: Mar 2004
Location: South East coast Florida
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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
03-01-2008, 10:22 PM
#6
Le Mans Master
Thread Starter
Code....
Soup it is....
Everything is good. Hope to see you and Karin soon. Congrats to Krissy
03-01-2008, 10:27 PM
#7
Le Mans Master
Thread Starter
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.
