AFM valve question
Thread Starter
Cruising
Joined: Jun 2018
Posts: 12
Likes: 2
From: Hamburg, NY
AFM valve question
i installed MBRP axle system and it has brackets to retain AFM actuators but without any actual valves. But it still throws a code and CEL comes on. I’ve cleared the code but CEL returns after a short time. Any ideas? Does the dealer just need to do the re-learning thing ?
Le Mans Master
Joined: Oct 2014
Posts: 8,687
Likes: 2,731
From: Atlanta GA
Its throwing a code because you don't have the actuators ... and they can't be tuned out . Most just hook them up and strap them to the exhaust pipe if you don't want the valves to actually open and close
I am sure that they made the mounting bracket to make it easier than strapping them to the pipe
Dave
I am sure that they made the mounting bracket to make it easier than strapping them to the pipe
Dave
Last edited by Dcasole; Jun 23, 2018 at 12:18 PM.
Tech Contributor
Joined: Jan 2015
Posts: 5,693
Likes: 1,451
Its throwing a code because you don't have the actuators ... and they can't be tuned out . Most just hook them up and strap them to the exhaust pipe if you don't want the valves to actually open and close
I am sure that they made the mounting bracket to make it easier than strapping them to the pipe
Dave
I am sure that they made the mounting bracket to make it easier than strapping them to the pipe
Dave
It doesn't need the valves to clear the CEL. The actuator just needs to be able to turn 90 degrees closed then back to open to see internal position switches , maybe they aren't turning. Turn on accessory only and try to listen for the buzzing.
Thread Starter
Cruising
Joined: Jun 2018
Posts: 12
Likes: 2
From: Hamburg, NY
Its throwing a code because you don't have the actuators ... and they can't be tuned out . Most just hook them up and strap them to the exhaust pipe if you don't want the valves to actually open and close
I am sure that they made the mounting bracket to make it easier than strapping them to the pipe
Dave
I am sure that they made the mounting bracket to make it easier than strapping them to the pipe
Dave
The actuators are attached to the dummy mounts on the new pipe and the wiring is connected. They are just not turning a valve cause there is no valve.
Le Mans Master
Joined: Oct 2014
Posts: 8,687
Likes: 2,731
From: Atlanta GA
maybe Bruno can weigh in ....
Dave
Last edited by Dcasole; Jun 23, 2018 at 01:43 PM.
Thread Starter
Cruising
Joined: Jun 2018
Posts: 12
Likes: 2
From: Hamburg, NY
‘the code is p26c8’ I read somewhere that if the the car detects they were disconnected at any time the dealer needs to cycle them through some relearning routine.
I'm Batman..
Joined: Apr 2014
Posts: 6,143
Likes: 921
From: Lehigh Acres FL
Tech Contributor
Unless they changed something in later years, you heard from someone who was mistaken.
Premium Supporting Vendor
Joined: Oct 2016
Posts: 3,851
Likes: 470
From: Manassas VA
i installed MBRP axle system and it has brackets to retain AFM actuators but without any actual valves. But it still throws a code and CEL comes on. I’ve cleared the code but CEL returns after a short time. Any ideas? Does the dealer just need to do the re-learning thing ?
Post up a vid. I would like to hear it
Tks
Chip
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Thread Starter
Cruising
Joined: Jun 2018
Posts: 12
Likes: 2
From: Hamburg, NY
I had the CEL off for a few days cause I was driving in manual mode, today in auto it came back on as soon as V4 mode activated. I verified actuator wiring was secure. I don’t believe they could be binding cause they are just mounted to dummy bracket.
Advanced
Joined: Feb 2021
Posts: 69
Likes: 6
anyone ever figure this out? I have the same axle back (MBRP) and the CEL for the AFM valves tripped. The actuators are mounted to the over the axle pipes and connected but still got a code. I bought some AWE simulators just now I guess they are necessary if these codes aren't disabled by tune.
Thread Starter
Cruising
Joined: Jun 2018
Posts: 12
Likes: 2
From: Hamburg, NY
anyone ever figure this out? I have the same axle back (MBRP) and the CEL for the AFM valves tripped. The actuators are mounted to the over the axle pipes and connected but still got a code. I bought some AWE simulators just now I guess they are necessary if these codes aren't disabled by tune.
I'm Batman..
Joined: Apr 2014
Posts: 6,143
Likes: 921
From: Lehigh Acres FL
Tech Contributor
Advanced
Joined: Feb 2021
Posts: 69
Likes: 6
I'll check the connections to the actuators I remember where the mounts were located on the over the axle pipes the connectors barely reached them so maybe they came out.
Last edited by slow4mula; May 26, 2021 at 09:40 PM.