rolandguenther6
Peugeot 406 Intake Manifold Flap Issue
Summary of the thread
A 2004 Peugeot 406 diesel is experiencing issues indicative of an intake manifold flap control malfunction, including reduced engine power, rough running, jerking during acceleration, a hissing sound, and increased fuel consumption. Diagnostics suggest a defective intake manifold control switch. A similar case was resolved by replacing the intake manifold flap control, which restored the vehicle's performance.
Did this summary help you solve your problem?
4 comment(s)
rolandguenther6 (community.author)
Thank you for your response. I have inspected the intake system for leaks, but my search proved fruitless. Could you elaborate on your experience? Did replacing the intake manifold flap control resolve the issue?
friedrich_schulz58
Yep, in my case, it was the intake manifold flap control, beyond any doubt. I tried cleaning it first, but it was toast. Honestly, save yourself the headache and just get it replaced. It's a fiddly job, and if you're not careful, you could make things worse. I'd suggest taking it to a trusted workshop. Better safe than sorry.
rolandguenther6 (community.author)
Thank you for your insights and counsel. I entrusted my Peugeot 406 to a local workshop. As suspected, the intake manifold flap control was defective. The replacement, costing 465€, has rectified the issues, restoring my vehicle.
rmh_community_comment_box_header
community_crosslink_scanner_headline
community_crosslink_scanner_intro
community_crosslink_scanner_title
community_crosslink_scanner_price
community_crosslink_rmh_headline
community_crosslink_rmh_intro
community_crosslink_rmh_title
community_crosslink_rmh_subtitle
community_crosslink_rmh_brand
PEUGEOT
community_crosslink_rmh_model
406
friedrich_schulz58
Sounds familiar. I have a 406 diesel as well. I had similar symptoms a while back: reduced power, rough running, hissing. Drove me nuts! Have you checked for any obvious leaks in the intake system? It could be something simple before you dive into the flap control itself. Imagine trying to blow up a balloon with a tiny hole in it. You'll get some air in, but it's a lot harder and you'll hear a hiss.