Code P0420 after exhaust install.
02-02-16, 07:41 PM
#1
Code P0420 after exhaust install.
Hey everybody I just recently installed the new X force exhaust system on my 2008 ISF with 72,000 miles on it. I've had the exhaust on the car for about 300 miles it when I was driving home from work today the vsc and check engine light pops up . I turn the car off when I got home and then turned it back on the check engine light was off but the stored Code was still there when I read it with the scanner P0420. I'm thinking maybe there's an exhaust leak even though it sounds fine. Thanks in advance for any help.
02-02-16, 10:25 PM
#4
Yeah I feel you, sucks using those sick days for diagnosing car days... been there done that.
On a side note, assuming the primary sensors/header/cat was untouched during the catback exhaust install, did you take care of the o2 sensor wiring, they are easily damaged causing that code. I'm sure it is highly unlikely that your catalytic converters are bad.
Using some anti sieze on those threads will also save you a lot of pain in the future should you decide to remove the o2s in the future.
Who installed your exhaust?
On a side note, assuming the primary sensors/header/cat was untouched during the catback exhaust install, did you take care of the o2 sensor wiring, they are easily damaged causing that code. I'm sure it is highly unlikely that your catalytic converters are bad.
Using some anti sieze on those threads will also save you a lot of pain in the future should you decide to remove the o2s in the future.
Who installed your exhaust?
02-03-16, 09:10 AM
#10
Driver School Candidate
Hey everybody I just recently installed the new X force exhaust system on my 2008 ISF with 72,000 miles on it. I've had the exhaust on the car for about 300 miles it when I was driving home from work today the vsc and check engine light pops up . I turn the car off when I got home and then turned it back on the check engine light was off but the stored Code was still there when I read it with the scanner P0420. I'm thinking maybe there's an exhaust leak even though it sounds fine. Thanks in advance for any help.
It basically makes the sensor read a slower exhaust gas flow, fooling the ECU into thinking the original cat is still there and restricting the gas flow as it should.
02-03-16, 11:36 AM
#11
This worked for me (not identical to the one from Amazon but similar in design and function):
Amazon.com: 90 Degree Angled O2 Check Engine Light CEL Fix Oxygen Spacer Exhaust Extension: Automotive
It basically makes the sensor read a slower exhaust gas flow, fooling the ECU into thinking the original cat is still there and restricting the gas flow as it should.
Amazon.com: 90 Degree Angled O2 Check Engine Light CEL Fix Oxygen Spacer Exhaust Extension: Automotive
It basically makes the sensor read a slower exhaust gas flow, fooling the ECU into thinking the original cat is still there and restricting the gas flow as it should.
02-03-16, 01:06 PM
#14
Tech Info Resource
iTrader: (2)
This worked for me (not identical to the one from Amazon but similar in design and function):
Amazon.com: 90 Degree Angled O2 Check Engine Light CEL Fix Oxygen Spacer Exhaust Extension: Automotive
It basically makes the sensor read a slower exhaust gas flow, fooling the ECU into thinking the original cat is still there and restricting the gas flow as it should.
Amazon.com: 90 Degree Angled O2 Check Engine Light CEL Fix Oxygen Spacer Exhaust Extension: Automotive
It basically makes the sensor read a slower exhaust gas flow, fooling the ECU into thinking the original cat is still there and restricting the gas flow as it should.
02-03-16, 03:10 PM
#15
I'm going to drive the car to work tomorrow and put it on the lift and check the 02's again and the front where it hooks up to the header and check for leaks. But again the car sounds great and I would imagine I picked up a few HP with this exhaust.