Check engine light
JK Newbie
Joined: Jul 2011
Posts: 10
Likes: 0
From: Pittsburgh, PA
Originally Posted by mrhupen
My 08 started showing me the check engine light. I have an OBDII code reader and it gave me this code P0420 code. I looked it up and it has something to do with the catalyst System. Anybody else having this same error code?
JK Enthusiast
Joined: Jan 2011
Posts: 210
Likes: 0
From: Coleman, Tx
I come up with 19 codes in the P04XX series.
P0401 - Egr System Performance
P0403 - Egr Solenoid Circuit
P0404 - Egr Position Sensor Rationality Open
P0405 - Egr Position Sensor Circuit Low
P0406 - Egr Position Sensor Circuit High
P0420 - Catalyst Efficiency (bank 1)
P0430 - Catalyst Efficiency (bank 2)
P0440 - General Evap System Failure
P0441 - Evap Purge System Performance
P0443 - Evap Purge Solenoid Circuit
P0452 - Evap Pressure Switch Stuck Closed
P0455 - Evap Purge System Large Leak
P0456 - Evap Purge System Small Leak
P0457 - Loose Fuel Cap
P0461 - Fuel Level Sensor 1 Performance
P0462 - Fuel Level Sensor 1 Circuit Low
P0463 - Fuel Level Sensor 1 Circuit High
P0480 - Cooling Fan 1 Control Circuit
P0481 - Cooling Fan 2 Control Circuit
P0401 - Egr System Performance
P0403 - Egr Solenoid Circuit
P0404 - Egr Position Sensor Rationality Open
P0405 - Egr Position Sensor Circuit Low
P0406 - Egr Position Sensor Circuit High
P0420 - Catalyst Efficiency (bank 1)
P0430 - Catalyst Efficiency (bank 2)
P0440 - General Evap System Failure
P0441 - Evap Purge System Performance
P0443 - Evap Purge Solenoid Circuit
P0452 - Evap Pressure Switch Stuck Closed
P0455 - Evap Purge System Large Leak
P0456 - Evap Purge System Small Leak
P0457 - Loose Fuel Cap
P0461 - Fuel Level Sensor 1 Performance
P0462 - Fuel Level Sensor 1 Circuit Low
P0463 - Fuel Level Sensor 1 Circuit High
P0480 - Cooling Fan 1 Control Circuit
P0481 - Cooling Fan 2 Control Circuit
JK Newbie
Joined: Jan 2008
Posts: 87
Likes: 0
From: Glen Carbon, IL
I've got an '11 Rubicon and my check engine light popped on a couple days ago. I'm at 2800 miles. I've got no codes displayed when I check - only the six dashes then "done". The jeep seems to have a little less power off the line, then again at highway speed, but I'm not convinced that it's just me staring at the light...
The dealership I purchased from does free oil changes for as long as you own the vehicle, so I'll have them check it in a couple days when the oil gets changed. I'll post up and let you know if anything develops.
jim
The dealership I purchased from does free oil changes for as long as you own the vehicle, so I'll have them check it in a couple days when the oil gets changed. I'll post up and let you know if anything develops.
jim
JK Super Freak
Joined: Jun 2010
Posts: 1,130
Likes: 1
From: Howard Beach, NY
I just got an oxygen sensor code, something like p0102...being the lower sensor. It was replaced. Drove two miles...engine light comes back on. Now the drivers side sensor is acting up. Changed the sensor. Still was giving the check engine light...my good friend is a former Chrysler mechanic, tried everything possible.....unfortunately the new sensor may be defective..I hope....will try Monday to exchange and replace again.