P1416 AIR - Confusing Intermittent Problem - Help Please
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Instructor
Joined: Aug 2004
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P1416 AIR - Confusing Intermittent Problem - Help Please
My 1998 6-speed coupe recently granted me a glowing Check Engine Light, code P1416 AIR SYSTEM BANK 2.
Here's what has happened so far:
1. It came on after I had made a brief stop at the office, car was only parked, engine off, for 2-3 minutes. CEL came on shortly after starting engine and driving.
2. Drove home ~25mi with the CEL on. I looked up possible problems, didn't find anything strange or disconnected under the hood, and cleared the code.
3. Test drove it back/forth to work 50 miles today, 2 hours, no problems.
4. Then, I parked, engine off, at a coffee shop for 5 minutes and when I turned the car back on, the CEL and P1416 came back. Cleared it again and drove to a nearby restaurant for lunch.
5. After a 1-hour lunch, started the engine, and no CEL
6. Drove home, parked the car, turned off engine. Waited 30 sec, then tried turning back on. CEL & P1416.
So, it appear I'm getting a CEL, P1416 only when the car is parked for short periods of time. Any advice or suggestions on where to begin??
Thanks,
Brian
Here's what has happened so far:
1. It came on after I had made a brief stop at the office, car was only parked, engine off, for 2-3 minutes. CEL came on shortly after starting engine and driving.
2. Drove home ~25mi with the CEL on. I looked up possible problems, didn't find anything strange or disconnected under the hood, and cleared the code.
3. Test drove it back/forth to work 50 miles today, 2 hours, no problems.
4. Then, I parked, engine off, at a coffee shop for 5 minutes and when I turned the car back on, the CEL and P1416 came back. Cleared it again and drove to a nearby restaurant for lunch.
5. After a 1-hour lunch, started the engine, and no CEL
6. Drove home, parked the car, turned off engine. Waited 30 sec, then tried turning back on. CEL & P1416.
So, it appear I'm getting a CEL, P1416 only when the car is parked for short periods of time. Any advice or suggestions on where to begin??
Thanks,
Brian
Thread Starter
Instructor
Joined: Aug 2004
Posts: 230
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Super common problem. Do a search in the C5 Tech forum for P1416.
http://forums.corvetteforum.com/sear...rchid=28941838
http://forums.corvetteforum.com/sear...rchid=28941838
I was just wondering if anyone had the same "park-then-start" symptoms as I had described. I thought it was strange that the AIR cold-start system was throwing codes only when I was "hot-starting" the car.
-Brian
Tech Contributor
Joined: May 2008
Posts: 3,100
Likes: 17
From: Somers, CT and Clermont, FL
St. Jude Donor '09-'10-'11-'12-'13-'14-'15-'16
Le Mans Master
Joined: Mar 2002
Posts: 5,955
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From: PNW
Thanks, been reading up the last couple days. Great info.
I was just wondering if anyone had the same "park-then-start" symptoms as I had described. I thought it was strange that the AIR cold-start system was throwing codes only when I was "hot-starting" the car.
-Brian
I was just wondering if anyone had the same "park-then-start" symptoms as I had described. I thought it was strange that the AIR cold-start system was throwing codes only when I was "hot-starting" the car.
-Brian
When my AIR check valve was going out, I could be going down the highway at 70 mph and watch the dash and see the CE light suddenly appear, and the cause was the P1416 code.
Thread Starter
Instructor
Joined: Aug 2004
Posts: 230
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Update:
Performed the passenger side AIR sensor cleaning and havn't gotten the CEL for a few weeks, and 300+ miles. Also replaced a very worn PVC elbow.
BUT, I do hear the AIR pump run for about 1-2 seconds whenever the car is at a stoplight. Really strange. To my understanding, this is a cold-start-only pump to help emissions. Any ideas?
Performed the passenger side AIR sensor cleaning and havn't gotten the CEL for a few weeks, and 300+ miles. Also replaced a very worn PVC elbow.
BUT, I do hear the AIR pump run for about 1-2 seconds whenever the car is at a stoplight. Really strange. To my understanding, this is a cold-start-only pump to help emissions. Any ideas?
Tech Contributor
Joined: May 2008
Posts: 3,100
Likes: 17
From: Somers, CT and Clermont, FL
St. Jude Donor '09-'10-'11-'12-'13-'14-'15-'16
Check with a scan tool, that can display real time operational data, to confirm that the A.I.R. pump is actually running after the warm-up period.
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