Emissions control: EGR, DPF, catalytic converter and AdBlueGeneric OBD-II codeUrgency: Monitor
Code P0441: EVAP system: incorrect purge flow
P0441 means: evaporative emission control system (EVAP): incorrect purge flow.[1][2] The EVAP system stores petrol vapours from the tank in an activated carbon filter (canister) and, when the engine is ready, sends them to the intake to be burned via a purge valve. P0441 indicates that this purge flow is lower or higher than it should be.[1][2]
What code P0441 means
The EVAP system stores petrol vapours from the tank in an activated carbon filter (canister) and, when the engine is ready, sends them to the intake to be burned via a purge valve. P0441 indicates that this purge flow is lower or higher than it should be.[1][2]
The ECU can detect it with the engine running (the pressure change when the purge valve opens does not reach the minimum) and also with the engine off, by checking the system pressure hours after switching off. According to one source, the light comes on after two drive cycles with the fault.[2]
It is a generic code (it starts with P0), but the cause varies by brand: on VW, Audi, Nissan and Mazda, one source names the purge valve as the most common culprit.[1][2]
Original definition (SAE J2012): Evaporative Emission Control System Incorrect Purge Flow[1][2]
Causes of P0441
From most to least likely, according to the sources.
- 1Faulty purge valve (solenoid valve): stuck open or closed, or with a faulty coil or wiring.[1][2][3]
- 2Purge hose blocked, kinked, disconnected or cracked; on some Toyotas, canister hoses and VSV valves.[1][2][3]
- 3Vacuum leak near where the purge pipe joins the intake.[1]
- 4Stuck canister vent valve or a faulty fuel tank vapour pressure sensor.[1][2][3]
- 5Activated carbon filter damaged or saturated with fuel, for example from repeatedly topping up the tank after the pump first clicks off.[1][2]
Symptoms
- Engine warning light on, sometimes the only symptom.[1][2][3]Engine warning light: faults that cause it
- Slightly uneven idle or, in some cases, slight jerking.[1][3]Vibrations: faults that cause it
- Smell of petrol near the car, especially after parking in hot weather.[2]Fuel smell: faults that cause it
How to diagnose P0441
In order: from the most likely and cheapest to check to the most expensive.
- 1Visual inspection: fuel cap properly closed, cracks in the carbon canister and EVAP hoses properly connected.[1]
- 2If there are other EVAP codes such as P0446, P0442 or P0452/P0453, deal with them first: they can also cause P0441.[1][2]
- 3Test the purge valve with a hand vacuum pump: it should hold vacuum when closed and open fully when given power. Measure the coil resistance and the wiring.[1][2][3]
- 4Check for a blockage in the purge hose and, if there are carbon granules in the valve, consider the carbon canister.[1][2]
- 5If everything is fine, look for leaks with a smoke test and check the vent valve and the pressure sensor.[2][3]
Can I keep driving with P0441?
Monitor
Sources describe it as an emissions fault with no mechanical risk: you can keep driving, but it should be repaired before the next MOT or emissions test, because the EVAP system will not complete its self-check.[2][3]
Documented faults related to P0441
Known faults of specific engines and cars, with their repair cost, the affected years and their sources.
Wiring, connectors and short circuits: the most serious faults by engine and car
- Critical severityFrequency: OccasionalBMW N62 / N63Additional turbo coolant pump with a risk of short circuit and fireIn 2011 BMW recalled 5, 6 and 7 Series, X5 and X6 models built between 2007 and 2011 because of the additional turbo coolant pump: moisture, a short circuit and, in extreme cases, a fire. In 2012 there was another campaign for a crack in the pump, with a more robust version.
- High severityFrequency: Occasional1.3 TCeBlown fuel pump fuseOn the Renault Captur II and Clio V with the 1.3 TCe engine, a 20-amp fuse can blow and leave the car without an engine. According to L'argus, in April 2021 this fault still had no factory fix; the official service centre's diagnosis includes checking, and sometimes replacing, the catalytic converter.
- High severityFrequency: OccasionalM264/M254Poorly tightened 48 V earth wiring in the mild-hybrid system (fire risk)Mercedes-Benz has issued several recalls (2022-2025) because the 12 V and 48 V earth connections of some cars with a 48 V system may be poorly tightened: resistance rises, the connection heats up and a fire cannot be ruled out. The official workshop checks them and repairs them if necessary in an hour or more.
- High severityFrequency: Occasional1.9 TDIUnit injector tappet wear and injector wiring damageOn the unit injector system, the tappets that operate the injectors can wear if the oil is not changed on time, and the injector wiring can be damaged by contact with oil, causing misfires or loss of power.
- Critical severityFrequency: CommonRover 75Seat SRS connector fault with airbag and seatbelt warning light onAuto Express warns that the Rover 75's seat SRS connector can cause the airbags to fail, and dealers were fixing it with revised connectors. The Dutch APK inspection puts the airbag or seatbelt fault warning among the most frequent defects across almost all series.
- Critical severityFrequency: OccasionalAlfa Romeo GiuliettaShort circuit from badly routed wiring that can prevent gear shifting (KBA campaign, 2010-2015)Yes: according to Germany's KBA, on Alfa Romeo Giulietta cars built between 2010 and 2015 inadequate cable routing could cause a short circuit and, as a result, gear-shift failure.
Engine sensors: the most serious faults by engine and car
- High severityFrequency: Occasional2.0 DTI and 2.2 DTIVP44 injection pump and air mass meter failureGerman Wikipedia documents recurring failures of the Bosch VP44 injection pump and the air mass meter in the early years of this engine. An owner testimony for this engine describes the pump being replaced at 192,500 km, at a cost the owner calls «prohibitive».
- Medium severityFrequency: Common2.0 TDIClogged particulate filter or faulty pressure sensorThe 2.0 TDI's particulate filter clogs if the car mostly makes short journeys, because it never gets to regenerate; sometimes the fault is just the differential pressure sensor. Cleaning it costs around €200 and replacing it, €800 to €3,000.Repair (garage): €800–€3,000
- Medium severityFrequency: Common1.4 and 1.6 8vCrankshaft position sensor failure (TDC sensor)The crankshaft position sensor (capteur PMH, or TDC sensor) appears repeatedly in the reliability sources for the Clio II, the Kangoo I and the Dacia Logan I with this engine, with hard cold starting or stalling as the main symptoms. It is a cheap part, but the failure can leave you stranded.
- Medium severityFrequency: Common1.4 and 1.6 16vCrankshaft position sensor failureThe crankshaft position sensor (capteur PMH) appears repeatedly in the reliability sources for almost every generation with this engine, with hard cold starting, stalling or the car cutting out unexpectedly. It is a cheap part, but the failure can leave you stranded.
Frequently asked questions
Can I drive with code P0441?
Yes. According to the sources consulted, there is no risk to the engine and no noticeable change in driving, but the light will stay on and there is a risk of failing the emissions test.[2][3]
Which part fails most often?
The purge valve, according to Samarins, on many cars such as VW, Audi, Nissan and Mazda. It is an easy part to replace on most cars, but it is worth ruling out hoses, leaks and the vent valve first.[1]
What is the difference from P0443?
P0441 measures whether the purge flow is correct; P0443 is an electrical fault in the purge valve circuit.[1][2]
How much does it cost to fix?
Carista estimates between £50 and £350 and CarWiki between €100 and €200, but these are generic estimates; they depend greatly on which part fails.[3][4]
Will I pass the MOT with code P0441?
If the code has switched on the engine warning light, no: with that light on, the inspection records a serious defect, and on Euro 5 and Euro 6 cars the ITV (Spain's roadworthiness inspection, similar to the MOT) also reads the OBD diagnostic system. Repair the fault before you go; clearing the code just before the inspection does not help either, because it counts as a serious defect.[5]
Not sure what is wrong with your car? Describe what you notice in the symptom diagnosis or see all fault codes.
Sources
Every fact on this page links to its source. If you find an error, let us know.
- P0441 Evaporative Emission Control System Incorrect Purge FlowSamarins.com · Technical documentation · consulted 29 October 2026
- P0441 – AutoDTCsAutoDTCs · Technical documentation · consulted 29 October 2026
- P0441: OBD2 diagnostic trouble codeCarista · Technical documentation · consulted 29 October 2026
- OBD Fehlercode P0441CarWiki.de · Technical documentation · consulted 29 October 2026 · in German
- Desmontando mitos: ¿puede pasar mi coche la ITV con el testigo de «avería motor» encendido?Diariomotor · Motoring press · published 8 March 2021 · consulted 2 October 2026 · in Spanish