AIR System, Bank 1
Thread Starter
Teching In
Joined: Aug 2002
Posts: 15
Likes: 0
From: Louisville, KY
AIR System, Bank 1 My 1998 TA threw the SES light on Friday. I ran the Autotap yesterday and it told me "AIR System, Bank 1"...it was thrown twice actually. I don't remember the code. First of all, I'm assuming that bank 1 is the driver's side....is that correct? We started testing the different things in the AIR system that we could, the air pump works if you bridge the relay terminals. How can I test the relay? We cleared the codes and drove it around and it didn't throw any errors again. I'm going to take the lines apart and check the check valves on each side to see if they are sticking. Is there anything else I should check and if so, how?
I wouldn't think this would cause the problem, but I have a spark plug that burns cooler than the other 7 due to one of them being dropped. That shouldn't cause any errors though should it? Especially not in the AIR system. Any advice?
Thanks in advance
Scott
I wouldn't think this would cause the problem, but I have a spark plug that burns cooler than the other 7 due to one of them being dropped. That shouldn't cause any errors though should it? Especially not in the AIR system. Any advice?
Thanks in advance
Scott
Re: AIR System, Bank 1 Bank 1 would indicate a check valve problem on the driver's side.
What happens is that the pump turns on, and starts shooting fresh air in to both sides of the exhaust. The check valves allow this fresh air to enter, and the PCM monitors the O2 sensors to see if there's a change in oxygen content reading (air pump on = high oxygen). If there's a change, then it knows that all is functioning normally.
If the PCM knows that the air pump is on, sees fresh air on the passenger's side (bank 2), but doesn't see the fresh air on the driver's side (bank 1), it'll throw this code. So, focus on the check valve.
HTH,
Andrew
What happens is that the pump turns on, and starts shooting fresh air in to both sides of the exhaust. The check valves allow this fresh air to enter, and the PCM monitors the O2 sensors to see if there's a change in oxygen content reading (air pump on = high oxygen). If there's a change, then it knows that all is functioning normally.
If the PCM knows that the air pump is on, sees fresh air on the passenger's side (bank 2), but doesn't see the fresh air on the driver's side (bank 1), it'll throw this code. So, focus on the check valve.
HTH,
Andrew
