C5 P0411 P1544 Error Codes

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KorbenDallas
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C5 2003 1.8 Petrol Automatic

C5 P0411 P1544 Error Codes

Post by KorbenDallas »

Hello.

My C5 2003 1.8 Petrol Automatic drives normally without issues but after being serviced at the dealer, I got the "Service" light and the "Check Engine" light.

In order to have an idea, I bought an ELM adapter and installed the FAP App, scan codes and received one code "P0411", after some search I found "Secondary Air System", so, dismantled the secondary air pump, which was really dirty, cleaned, lubed, assembled. Cleared the code and made a weekend trip.

No problems at all, but, after 150 km, and three days, I got the message again "Pollution Fault", another check, the same code "P0411".

Check all the connections, hoses, etc. Cleared the code. No issues.

Same as before, "Pollution Fault" but this time I got two codes P0411 and P1544, the last one I can´t find any info, only two "causes", Low Gas Pressure (AC) or Idle Valve, but the car still drives normal, no issues at all. the only change is when I clear the codes the automatic gearbox change gears with some roughness. surprisingly, when it shows the codes, the auto changes smoothly.

Fast forward until today, I bought a Diagbox scanner and an old laptop with Windows 7. Finally, everything is installed and running.

Tried to connect to the car, open Diagbox V 07.02, connect the VCI with the laptop, and then with the OBD port in the car.

Select Citroen, C5, read the VIN number, ask for the RPO number, shows two buttons "Lexia" and "Scantool", select "Lexia" and nothing happens.

Tried many times, after restarting the laptop, opening Diagbox first and waiting for it to ask to connect the VCI, and then to connect to the car, and nothing happens after I insert the RPO number, only the screen showing LEXIA and SCANTOOL.

So, scan again with the ELM Bluetooth adapter and the FAP app and still the two same codes P0411 and P1544.

I'm running out of options, so, any ideas about the Error Codes? Any suggestion in order to connect the Diagbox?

I'm also trying to connect a Bluetooth Adapter in the CD Changer connector, but I need to activate the "CD Changer Option" in the Diagbox. I'm simply trying to keep the original radio but would like to listen to the GPS direction on my cellphone and the Spotify playlist.

Thanks in advance for any help you can provide me.
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GiveMeABreak
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Re: C5 P0411 P1544 Error Codes

Post by GiveMeABreak »

P1544: Concerns the Gear selection actuator electric motor control fault: Coherence
I'm not getting anything for P0411 sorry, it's not a code showing up for the 1.8 Petrol.

Unfortunately with these early petrol vehicles, there's very little on fault codes.
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Re: C5 P0411 P1544 Error Codes

Post by wheeler »

Is the air pump actually working? You should easily be able to hear it running, they are normally fairly loud. It should run for about 2 minutes after starting the engine from cold & idling.
If its not operating disconnect, apply 12v & earth directly to the terminals & it should start pumping.
Report back with the results.
KorbenDallas
(Donor 2021)
Posts: 5
Joined: 20 Nov 2021, 16:40
Location: Portugal
Lexia Available: Yes
My Cars: C3 2015 1.2 Petrol Manual
C5 2003 1.8 Petrol Automatic

Re: C5 P0411 P1544 Error Codes

Post by KorbenDallas »

Hello.

Finally, all the codes are gone. After many tries, my Lexia communicates with the car, so I checked the error log and found many "issues" related to the right front door command. Apparently, all the issues originated when I installed a 70mai dashcam rearview mirror, and I made the connections in the fuse box on the right door command fuse. After clearing all the error logs, and disconnecting the dashcam, everything is working like a charm.
No more errors, no more issues.
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GiveMeABreak
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Joined: 15 Sep 2015, 19:38
Location: West Wales
My Cars: C3 Aircross SUV HDi Flair Peperoncino Red (The Chili Hornet)
C5 X7 2.0 HDi Exclusive Mativoire Beige (The Golden Hornet)
C3 1.6 HDi Exclusive Aluminium Grey (The Silver Hornet)
C5 MK II 2.0 HDi Exclusive Obsidian Black
C5 MK I 2.0 HDi SX Wicked Red
Xantia S2 2.0 HDi SX Hermes Red
C15 Romahome White
XM 2.0 Turbo Prestige Emerald Green Pearlescent
XM 2.0 Turbo Prestige Polar White
XM 2.0 SX Polar White
CX 20 Polar White
GS 1220 Geranium Red
CX 2.4 Prestige C-Matic Nevada Beige
GS 1000 Cedreat Yellow
x 5646

Re: C5 P0411 P1544 Error Codes

Post by GiveMeABreak »

Thanks for the update. Fitting aftermarket devices into existing wiring can cause electrical faults due to the nature of multiplexed electronics. I'm glad you have tracked down your issue.

If you are going to fit anything aftermarket, make sure you use an appropriately rated fuse on a non-sensitive system (switched or positive supply), preferably using a piggy back fuse type and a separate earth.
Please Don't PM Me For Technical Help

Marc
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