DTC P1416 Returns Again!
Thread Starter
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
DTC P1416 Returns Again!
It first showed up last fall; Secondary AIR, DTC P1416. I did a Forum search, and followed Bill Curlee's EXCELLENT 
check valve cleaning procedure.
All was good untill last Friday evening, when I glanced down at the instrument cluster and noticed that the MIL was on.
A quick check for codes, from the DIC, came up with P1416 again.
Over the weekend I did the carb. cleaner and WD40 treatment to the Bank 2 check valve, followed by a good shot of compressed air. While doing it, I blocked off the supply line at the Bank 1 check valve to allow the full effect of the cleaner to reach Bank 2.
Yesterday evening, after about 5 or 6 driving cycles since the last cleaning, the P1416 code was back. I need to know which cleaner is giving the best results. My 01 has just over 27K miles on it, and I'm hoping to avoid removing the intake to replace the check valve.
Thanks in advance,
Jim
check valve cleaning procedure.All was good untill last Friday evening, when I glanced down at the instrument cluster and noticed that the MIL was on.
A quick check for codes, from the DIC, came up with P1416 again.Over the weekend I did the carb. cleaner and WD40 treatment to the Bank 2 check valve, followed by a good shot of compressed air. While doing it, I blocked off the supply line at the Bank 1 check valve to allow the full effect of the cleaner to reach Bank 2.
Yesterday evening, after about 5 or 6 driving cycles since the last cleaning, the P1416 code was back. I need to know which cleaner is giving the best results. My 01 has just over 27K miles on it, and I'm hoping to avoid removing the intake to replace the check valve.
Thanks in advance,
Jim
Drifting
Joined: May 2005
Posts: 1,590
Likes: 1
From: Littleton Colorado
If I remember right it took me a couple of tries to get it done. I just used wd-40. I'm not sure about the carb cleaner. I would be concerned that the carb cleaner is eating up the wd-40, but I could be wrong.
Try it a couple more times, and flood it pretty well as it has to go up to get to the check valve behind the head. I think mine even took a coulpe of days to work out.
Once you get it free, drive it daily for a little while to make sure it stays unstuck.
Try it a couple more times, and flood it pretty well as it has to go up to get to the check valve behind the head. I think mine even took a coulpe of days to work out.
Once you get it free, drive it daily for a little while to make sure it stays unstuck.
Thread Starter
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
Thanks MattB, I'll certainly give it another try.....I'ts easy enough to do.
I was hoping to find out which cleaner, that seems to work the best on these check valves. Anyone have good results with a particular brand?
I was hoping to find out which cleaner, that seems to work the best on these check valves. Anyone have good results with a particular brand?
Thread Starter
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
Burning Brakes
Joined: Oct 2001
Posts: 860
Likes: 40
From: Woodforest
I just did the procedure. Used STP Throttle Body Cleaner, followed by a chaser of WD-40. Took 3 attempts, but I was sending it all from the drivers side air injection hose and forcing it with compressed air. I've had the car out about 6 times since, prob about 150 miles total and haven't had it come back.
I would say just keep trying it a few times, beats the hell out of pulling the intake.
Just don't accidently hit the EM button when your clearing the DIC....
I would say just keep trying it a few times, beats the hell out of pulling the intake.
Just don't accidently hit the EM button when your clearing the DIC....
Thread Starter
Tech Contributor
Joined: May 2008
Posts: 3,100
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From: Somers, CT and Clermont, FL
St. Jude Donor '09-'10-'11-'12-'13-'14-'15-'16
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Thread Starter
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
Update on P1416
I found CRC brand Throttle Body Cleaner at one of the local auto parts stores, and used it along with WD-40 again on the Bank 2 AIR check valve.
I'm hoping for better results this time, and will post the outcome.
I'm hoping for better results this time, and will post the outcome.
Thread Starter
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
Still No Codes After 3 Days!
It's still good after 3 days of driving. I think the CRC Throttle Body Cleaner and WD-40 combination provided the best results to get that check valve freed-up.
Thanks to all that responded, and especially to Bill Curlee for his great
write up on the AIR check valve fix.
