P0441 Evap: Incorrect Purge Flow 2020 Kamiq SEL 1.5TSi

Wife's car 23,000 miles bought 2 years ago from main dealer failed MOT on Check Engine Light Showing. This is the saga

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Check Engine light shows 2 days prior to MOT date, duly fails 25Aug26.☹️

• Connect ODB reader & it shows one DTC. (P0441 “Incorrect Purge Flow”)

• Check fuel tank cap & seal (All OK)

• Clear DTC

• Code returns within 1 mile whilst driving.

• Code P0441 detected

• Recheck fuel cap seal & start research in manual, forums & online. First port of call seems N80 solenoid valve.

• Code cleared,

• Code returns within 1 mile of driving.

• Cleaned pipes on inlet manifold & checked electrical connectors to N80 solenoid & GV 344 Pressure sensor.

• Small crack found on insulation of Pin1 wire on GX 344 sensor (manifold pressure), so checked conductor continuity – OK, but reinsulated wire with liquid tape.

• Used hot air gun to soften hard plastic pipes, removed & checked N80 Evap system solenoid valve – OK on & off the car – both solenoid & pipes are completely clean – no sign of debris/dust/charcoal.

• Code cleared,

• Code returns within 1 mile of driving.

• Conclude GX 344 sensor faulty – not available separately so:

• Bought new genuine VW/AG N80/GX344 plus pipe assembly (all in one with quick connectors) & fitted. (£117)

• Code cleared

• Test drive of 15-20 miles All OK😀

• Check Engine light shows following morning 1 mile after restart.😡🤔

• Connect ODB reader & it shows one DTC. (P0441 again)

• Remove rear wheel & wheelarch liner, investigate activated charcoal canister & blow through all pipes.

• Remove canister & weigh – 1.700 Kg

• Check for weight of new one which is 1.330 Kg

• Conclude canister is contaminated, so order new VW/AG one. (£167) 01Sep2026

• LLL Parts take 5 days to dispatch an apparently "in-stock" item then DPD/Evri delays so part gets to me late Sep 11th (outside of my 10 working days free MOT retest)😠

• Fit new canister (after checking weight!) Sat 12th & arrange retest for today 14th Sept (I've dealt with this garage for MOT's for over 35 years so they squeezed me in)

• PASS MOT

The actual mechanical work is very straightforward, I could change sensors/pipes & canister in an hour now I know exactly what to do, but I have a nagging thought that only the canister needed replacing & my gx344 & N80 were fine - I know the N80 is certainly OK. It took hours of reading about these over complex modern petrol engines to find why & how to do the job, but the job was simple even at my advanced years (76☹️)

Anyway, wifey is now happy so I suppose it was £384 well spent - cheaper than a new cooker anyway😇