The check engine light came on my 03 Baja this morning all of sudden. So I diconnected the battery for about an hour and it reset the light but it came back on. So I went to Advance Auto and the guy hooked his code reader up. It's saying the O2 sensor on bank 1 is bad. He ordered me a new one and I'm going to replace it myself but he says it's "bank 1". So is bank 1 the upstream sensor or the one in the converter?
Thanks.
Which O2 sensor is bank 1?
Moderator: bajabob
- jseabolt
- Scoobytruck Master
- Posts: 102
- Joined: Fri May 08, 2009 2:56 pm
- Location: Kingsport, Tennessee
- Contact:
Which O2 sensor is bank 1?
http://s222.photobucket.com/albums/dd148/turbofiat/
2003 Subaru Baja
1968 Ford Fairlane 500
1980 Fiat 124 Spider (turbocharged)
1987 Yugo GV (1500 turbocharged)
1981 Trabant 601 S
1987 Citroen 2CV
1977 MGB
2003 Subaru Baja
1968 Ford Fairlane 500
1980 Fiat 124 Spider (turbocharged)
1987 Yugo GV (1500 turbocharged)
1981 Trabant 601 S
1987 Citroen 2CV
1977 MGB
Re: Which O2 sensor is bank 1?
no sure which would be bank1, but normally, Bank 1/Bank2 for this specific discussion refers to a left or right sensor if you have a split header. Upstream(front) or Downstream(rear) would refer to in front of the Catalytic Coverter or after it.....
on the Baja, I would bet it'd be like other manufacturers with 2 cylinder heads, that Bank 1 (meaning bank of cylinders) would be off the cylinder head that contains cylinder #1(See- firing plug order for clarification, not sure if it the left head is #1 & #3 or if it is #1 & #4 or what) and the apposing head would by default be Bank #2.
hope this helps.
on the Baja, I would bet it'd be like other manufacturers with 2 cylinder heads, that Bank 1 (meaning bank of cylinders) would be off the cylinder head that contains cylinder #1(See- firing plug order for clarification, not sure if it the left head is #1 & #3 or if it is #1 & #4 or what) and the apposing head would by default be Bank #2.
hope this helps.
Re: Which O2 sensor is bank 1?
Guessing you got a P0030 (or P0031/32) code? That would be your front O2 sensor. I had a P0032 code not long ago and switching out the front O2 sensor fixed it. It was an easy job, took ~10-15 mins to swap it out. If you could get us the exact code you have, it would help.
The part number is 22641AA280, I bought mine from SubaruParts.com. They were the cheapest that I found for an OEM replacement. The grandforks dealer wanted around $200 usd for it and a local dealer wanted 320+ cad.
The part number is 22641AA280, I bought mine from SubaruParts.com. They were the cheapest that I found for an OEM replacement. The grandforks dealer wanted around $200 usd for it and a local dealer wanted 320+ cad.
- jseabolt
- Scoobytruck Master
- Posts: 102
- Joined: Fri May 08, 2009 2:56 pm
- Location: Kingsport, Tennessee
- Contact:
Re: Which O2 sensor is bank 1?
Fixed it! It was apparantly the front sensor. I had to take the car back to Advance Auto to have them to kill the check engine light but so far it has stayed off. I guess I could have unhooked the battery again but I didn't like having to reset my radio presets and wait 30 minutes again. Plus they sold me the sensor so they could have least kill the code for me.Nitro350Z wrote:Guessing you got a P0030 (or P0031/32) code? That would be your front O2 sensor. I had a P0032 code not long ago and switching out the front O2 sensor fixed it. It was an easy job, took ~10-15 mins to swap it out. If you could get us the exact code you have, it would help.
The part number is 22641AA280, I bought mine from SubaruParts.com. They were the cheapest that I found for an OEM replacement. The grandforks dealer wanted around $200 usd for it and a local dealer wanted 320+ cad.
When the guy said "bank" I was under the impression there might have been a sensor for each exhaust manifold.
Here's a tip I found on another website which sort of makes it easier if you don't have a lift since I've yet to figure out a way to lift the entire front end off the ground with a single floor jack. Remove the passenger side wheel.
Figuring out how to unhook the sensor from the connector was probably the biggest hassle. I used a small flathead screwdriver and inserted it into the slot and kept working at it until I was able to unplug it.
This is the first "problem" I have ever fixed myself where the check engine light kicked on.
I had a Chevy Cobalt once that the check engine light kicked on after it sat for a few weeks. That turned out to be a corroded connection at the sensor that tells you, you left the gas cap off. Nothing wrong with the sensor. It was just sending a false signal to the computer. I had no idea where to even start looking or how to test the component.
Before buying my Subaru, I had a Jeep Wrangler with a weird intermittant starting issue. Chyrsler said it was a bad crank sensor but 6 months later the problem came back. The check engine light never came on but the computer flashed two codes. Battery recently being disconnected and a problem with the Air conditioning. Yet the vehicle didn't have A/C and I had replaced the battery awhile back! So I sort of lost faith in check engine lights and warning codes.
WOW! Just $129 + shipping? If snow season was over I would have waited and just ordered one from Subaruparts.com. I paid $200 with tax for a Bosch sensor from Advance Auto.
http://s222.photobucket.com/albums/dd148/turbofiat/
2003 Subaru Baja
1968 Ford Fairlane 500
1980 Fiat 124 Spider (turbocharged)
1987 Yugo GV (1500 turbocharged)
1981 Trabant 601 S
1987 Citroen 2CV
1977 MGB
2003 Subaru Baja
1968 Ford Fairlane 500
1980 Fiat 124 Spider (turbocharged)
1987 Yugo GV (1500 turbocharged)
1981 Trabant 601 S
1987 Citroen 2CV
1977 MGB