P306D-22 coherence problem

[vlad-nico]

Peugeot 508 r8 1.6 puretech 180hp. I have an error that I don't think is from the throttle, I think it's from the map sensor but I don't know if it's the first or the 2nd, has anyone else had problems?

does anyone have more details about the error?

P306D-22 Coherence Between The Position Of The Motorized Throttle-Housing (Air Mixer) And The Inlet Air Pressure: Value Higher Than Set-ting

[casieanvasile]

Today i got the same error ,did you manage to find the issue ?

[vlad-nico]

Today i got the same error ,did you manage to find the issue ?

not yet, I noticed that the inlet air value is 30-40 mBar higher than the one required by the computer, I changed the pressure map sensor, the blowoff valve, the rocker cap, and the spark plugs twice, cleaned the throttle, today the map sensor(with temeprature read) arrives, if that's not it either, probably the air flow meter

[MiroMirchev]

Do you have any progress with this, since I have the same ? Thanks!

[vlad-nico]

Do you have any progress with this, since I have the same ? Thanks!

Yes, carbon canistre it was fault

[MiroMirchev]

Great, thank you for your reply.

[Alex3105]

Hello. I'm suffering from the same error. Two mechanics said that I need to change the throttle valve or the intake manifold sensor. Yesterday I updated the engine block firmware. The error remained. But u1108 and u1308 also appeared. What kind of carbon filter is this?
P.S. is this it? was it replaced or repaired?

[MiroMirchev]

My case is strange, it is firstly hitting active cruise control fault and after a while of driving CITY LIMITS WITH LOW SPEED ONLY, hitting a check engine light with the respective fault. If I clear the DTCs and start driving long distance, the car might pass 1000 km even more without any issues, due to higher speeds out of city. In the moment when enter somewhere for lower speeds, active cruise fault is first, check engine second. That's why maybe the throttle valve makes sense in our case, because it is connected with throttle position sensor and doing some failings at low speeds. In my case, maybe there are no circumstances to be the carbon canister...

[MiroMirchev]

But in anyways, it is good to know yes, if you changed the whole carbon canister or the purge valve or the fuel cap, or all of them ? Thanks!

[Alex3105]

My case is strange, it is firstly hitting active cruise control fault and after a while of driving CITY LIMITS WITH LOW SPEED ONLY, hitting a check engine light with the respective fault. If I clear the DTCs and start driving long distance, the car might pass 1000 km even more without any issues, due to higher speeds out of city. In the moment when enter somewhere for lower speeds, active cruise fault is first, check engine second. That's why maybe the throttle valve makes sense in our case, because it is connected with throttle position sensor and doing some failings at low speeds. In my case, maybe there are no circumstances to be the carbon canister...

I have exactly the same thing with your car.
I also thought the same as you. But after this post, I thought about it. I don't know the algorithm of the carbon filter valve, but maybe this system starts working in the city because of the ecology, but doesn't work on the highway

[MiroMirchev]

Makes sense, I checked it already and actually the purge valve of the canister is quite cheap, so it is logical to try firstly with some cheap manipulations. If you succeed to change it before me and have positive progress, please share, so that to know the right direction for resolving it..

[Alex3105]

Makes sense, I checked it already and actually the purge valve of the canister is quite cheap, so it is logical to try firstly with some cheap manipulations. If you succeed to change it before me and have positive progress, please share, so that to know the right direction for resolving it..

I doubt that the problem is in the valve. I checked the tightness of the intake manifold using smoke. Nothing was found. And if the problem was in the electronics, then the error would not be p306d, but another one. This is my opinion

[MiroMirchev]

https://www.gmto.nl/problemen-peugeot-5008/ check this out. The guys are explaining it quite comprehensively, you can translate it with google translate. I'm betting on almost 100% to the purge valve, which is located below the airbox housing. To reach it, need to remove the full housing.

[oxxxide]

Hello, I have the same problem with Peugeot 508 1.6 181.
speed limiter fault, followed by check engine and error p306d

[sebekw1]

Hi all i got the same problem. 1.6 181 pk. They changed coils, sparkplugs, MAF sensor, battery and still nothing... this error comes mostly during parking a car at idle. Did somebody got the solution?