CEL P0420 after installing a Cat Converter
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CEL P0420 after installing a Cat Converter
Guys, i installed a new aftermarket cat, just after driving roughly 5-8 miles i got a CEL, checking it with a scanner it is
P0420 - Catalyst System Efficiency Below Threshold (Bank 1)
Took it to the mechanic, he checked the O2 sensors reading and according to him the second o2 sensor needs replacing as its giving quite high voltage around 1.2V. Although the sensor does fluctuate a a lot meaning its not dead or anything
Car runs fine without anyproblem, only yjhe fuel efficiency has dropped last time i didnt get a reserve light even at 370 miles with a full tank , this time i got a reserce light at 340 miles only.
Does it really mean a new sensor, they are also not that cheap, just afraid that if i replace it and the CEL comes back again .
Any help appreciated
P0420 - Catalyst System Efficiency Below Threshold (Bank 1)
Took it to the mechanic, he checked the O2 sensors reading and according to him the second o2 sensor needs replacing as its giving quite high voltage around 1.2V. Although the sensor does fluctuate a a lot meaning its not dead or anything
Car runs fine without anyproblem, only yjhe fuel efficiency has dropped last time i didnt get a reserve light even at 370 miles with a full tank , this time i got a reserce light at 340 miles only.
Does it really mean a new sensor, they are also not that cheap, just afraid that if i replace it and the CEL comes back again .
Any help appreciated
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