[Solved] Renault Master 2.3 dCI 2015 Loses Power, SID309, Error P0101 - High Signal Issue

Hi,
Renault Master 2.3 dCI 120kW 2015 SID309 engine controller. The problem is as follows: while driving, it sporadically loses power, throwing error P0101 - Air flow meter signal - signal too high.

Checked:
- tight intake manifold
- air flow meter replaced from a running car
- pins in the flowmeter connector OK

I tried to cause a fault in any way by unplugging the connector, shorting the flowmeter pins through the indicator to ground and plus. It then throws out 5V reference voltage errors or the signal from the flowmeter is too low. I cannot trigger a signal that is too high.

Do you have any ideas?

Connect with the first one. And you`ll see what happens next. But if error P0101 is Bosch...............

So you suggest replacing the flow with a Bosch one?
Close with the first one? If, with the cube connected, I apply even 5V or 12V to the signal (through a small indicator), the error still results in a too low signal.

after all, it`s a flowmeter with a digital output, you`d have to try hard to generate a signal that`s too high ;P

I know that the output signal recalculates based on frequency. But it is still strange that after applying 5V or 12V, the car throws a signal too low error. However, I will order this flow meter and let you know

Unfortunately, the topic is still relevant. Replacing the flow meter did not bring any result. Although the error comes on after about 150 km now.
Do you have any other ideas?

Well, what do the actual parameters show, the correct air flow?

Start with a flow meter, preferably from another car, and check the installation carefully, preferably using a diagram.

Unless the computer is misleading me (and it happens) by comparing the actual value with the required one, the graphs almost match at idle speed. While driving, the overscaling reaches 10-15%, but no matter how long I try to push the car with my foot on the floor, without changing gears, the error will not appear for that long. It can be thrown away when driving slowly, when the overscaling is 5%. Generally, when analyzing the recorded values from the flow meter, after the engine light comes on, even going back for 5 minutes, there are no peaks or any larger scaling than what can be seen over tens of kilometers.

It`s the same on three flow meters (although the error occurred much earlier on the original one. I don`t know, maybe it was a coincidence, maybe the first flow meter was damaged, the second one was from a running car, the third one was new). The harness was checked under load. Experimentally, by cutting the wires or shorting them to ground, this error cannot be caused. Of course, the adaptation values were undone with Clip. Therefore, I would leave the issue of the flow meter aside.
The turbine also works properly, the boost value is max. 2.2 atm, and after exceeding 3,000 rpm, this value drops, so I conclude that the geometry does not jam even occasionally after warming up.
By controlling the engine components (electric EGR, electric variable intake geometry, electric exhaust gas cooler valve), everything works.
I only noticed that when controlling two electric EGR water pumps, their errors appear (even though I have never had them: P24A8 and P24A7) and the pumps do not work. The harnesses for them are OK, they have power, so since I ordered them broken, they should arrive tomorrow, although I`m a bit skeptical about it.

ptr92 wrote:

that when controlling two electric EGR water pumps, their errors appear (even though I have never had them: P24A8 and P24A7) and the pumps do not work

I bet the pumps are working.
As for the flow error, it would be useful to diagnose it with something created for Renault, because it may turn out that this error is not the one

P0101, it cannot be other than the flow meter. Computers can lie about the translation of an error, but not about the error code.
As for push-ups. There is a third one, it works after being controlled by the computer.

It may be stupid, but is the air filter installed correctly and not too dirty?

Podepnij clip

ireneusz1981 wrote:

It may be stupid, but is the air filter installed correctly and not too dirty?

I looked at the filter, it`s OK, I don`t remember which film, but I think it`s Mann. Is it from this vehicle? it fits well, but I will check the catalog to be sure.

kjbip wrote:

Attach the clip

and what do you expect from this CLIP? any other values? KTS shows nothing for 150 km, and CLIP will show it? in KTS I have actual values from all sensors in the vehicle, do you think CLIP will have even more of them? I will control some components that I cannot control with the KTS, so? Read the discussion from the beginning as you try to help.
PS I will surprise you, CLIP did not bring anything, apart from resetting the adaptive values of the flow.

genek1000 wrote:

I assume that the pumps are working.

The pumps were installed, the old ones were broken.
What`s interesting is that the old pumps didn`t work and the computer didn`t see the error, so I thought they only worked after turning off the hot car. And it turns out that they work all the time, even when the engine temperature is below 90 degrees.

ptr92 wrote:

Do you think CLIP will have even more?

maybe
But he definitely won`t lie
Give a graph of the flow with revolutions

kjbip wrote:

Give a graph of the flow with revolutions

and what result will be correct at 3,000 rpm? 1300mg or maybe 700mg? If you wanted to compare it properly, you would also have to have charts of boost pressure, EGR opening, etc. You cannot compare the flow rate values, only the revolutions...

I hope that I will be able to close this issue soon. I rode a bit in the evening.
When the car was about to break down, it always happened when I let off the gas, never while accelerating. I explained this by the fact that the car does not want to lose power, e.g. when overtaking, which is why it reported the error when "not accelerating". But when you let off the gas, previously the actual and required values did not match, and now the scaling occurs when accelerating and driving smoothly, but when you let off the gas, the values coincide perfectly.
Could it be more efficient? did cooling the EGR valve have such an impact on the exhaust gas flow? I would like to emphasize that the car did not see any failure of the electric EGR pumps, so the EGR itself did not fail.

Or maybe disconnect these pumps and see if the error returns when you let off the gas. By the way, it`s hard to understand the airflow logic of this master. After installing these pumps, the exhaust gas temperature may have changed slightly, but the air temperature reading is only in MAF, I think. What`s your mileage there?

Added after 3 [minutes]:

As a rule, this error always appears when there is a leak behind the turbine, in my experience.

I could check it if the error didn`t appear after 150 km.
As for leaks, it makes perfect sense, but I already checked it by putting pressure into the manifold with a compressor, blocking the manifold entrance with my hand.
It doesn`t hiss anywhere, only under your hand
300 thousand Are you thinking about blowing your engine? Then the value on the flowmeter would be too low.

ptr92 wrote:

PS I will surprise you, CLIP did not bring anything, apart from resetting the adaptive values of the flow.

And what ? The clip also showed an error - the flowmeter signal is too high?
ASO employees sit on this forum. They can deduce something based on CLIP errors and observations of the vehicles they repair.
Moreover, I have encountered several times that errors are explained differently by different diagnostic equipment companies.

Sorry, but after replacing these pumps the error disappeared

Malorpietr wrote:

Sorry, but after replacing these pumps the error disappeared

You write this as the creator of the "ptr92" topic

I confirm. The car drives and does not lose power

Hello, can the author of this post please respond? 🙂

However, the intercooler was leaking and leaked at higher boost pressure.