P2A01 Code After New Cat Installed for P0420 Code
#1
P2A01 Code After New Cat Installed for P0420 Code
My 07 2.2 had been throwing a P0420 code, so I just changed the Cat, which took about 15 minutes. I cleared the codes and let car run for about half an hour in the driveway and no codes. I went to drive home and now it's throwing a P2A01 code (O2 Sensor Circuit Range/Performance Bank1/Sensor2). Could I have damaged that sensor when I took it off the old cat? I used a 1/2" Impact gun just to loosen it.
I also found a Walker Resonator setup for $50 bucks at PartsGeek.com. I figured I could changed the whole thing. Would you change the muffler on an 07 with 150K on the clock if it was only 50 Bucks?
I also found a Walker Resonator setup for $50 bucks at PartsGeek.com. I figured I could changed the whole thing. Would you change the muffler on an 07 with 150K on the clock if it was only 50 Bucks?
#3
Sound like you need to replace the down stream 02 sensor however I would recommend changing both 02 sensors.
Sometimes a new fast working downstream sensor working with a old slow working up stream sensor will sometimes throw a false cat convertor efficacy code.
Don't forget to at least visually check the 02 wiring for damage.
Sometimes a new fast working downstream sensor working with a old slow working up stream sensor will sometimes throw a false cat convertor efficacy code.
Don't forget to at least visually check the 02 wiring for damage.
#4
Don't use impact tools on sensitive electronic equipment. Even dropping an O2 sensor can damage it.
I fixed my P0420 by replacing the flange gasket, downstream O2 sensor and a SeaFoam treatment. A lot cheaper than a new cat.
I fixed my P0420 by replacing the flange gasket, downstream O2 sensor and a SeaFoam treatment. A lot cheaper than a new cat.
#5
OK, so I just replaced both O2 sensors and cleared the codes. Rode the car about a week with no CEL on. Now it just came on when I started the car this morning. P0054. which is for Bank 1, Sensor 2, Heater resistance. I never got this code before, what would cause this code to get triggered?
#6
On a side note, the last time I removes the Air Filter assembly, the "Intake Duct" fell apart in my hand. I am running the engine without it. I still have the Air filter assembly in place, but the Intake duct which goes to wheel well and connects to back of air filter assembly is missing.
I don't think that would have anything to do with it, but.
I don't think that would have anything to do with it, but.
#8
OK, so I just replaced both O2 sensors and cleared the codes. Rode the car about a week with no CEL on. Now it just came on when I started the car this morning. P0054. which is for Bank 1, Sensor 2, Heater resistance. I never got this code before, what would cause this code to get triggered?
Some of those codes need multiple occurrences in order to light up the CEL. And I don't think the heater test runs every time. Clearing the codes causes the emissions testing to start all over, and some of them take a long time to get started.
And, as I was always try to get across: just because a code description says to replace a part, further testing to find the REAL problem is required. You may have wasted your hard earned cash on a new cat.
#9
Yeah correct sensor and everything matched up color wise. Its so weird. I can't figure it out. Getting the intake duct replaced tomorrow, hopefully that will fix everything, but doubt it. Fingers crossed.
I replaced with OEM style plug sensors. Both O2 sensors were replaced.
I replaced with OEM style plug sensors. Both O2 sensors were replaced.
#10
P0054, says the calculated resistance did not fall in the expected range. This code points to the O2 sensor #2. Take the connector off the O2 sensor after the catalytic converter, make sure you see 12+ V on the PNK/BLK wire with key on, engine off, and then measure the resistance across the leads that mate with the PNK/BLK wire and GRY/WHT wire. They usually fail open. It's possible that you got a bad part. Also there is a fuse for the heater circuit in the under hood fuse box.