For that one cleaning the MAP/IAT sensor is not enough cos it's IAT side is fubar, IMO you need a new one, the MAF might escape with a cleaning though if the fault persist you need a new one too
Strangely my code reader never clears errors - it says the car must be siwtched off with the ignition on and then when i hit CLear it doesn't clear them. Well.... it says it doesnt anyway but it seems to have cleared the first error and wont clear these - like you say maybe these are current and permanent
You can't rule it out 100% with nultimeter unless you get open circuit then you know it's fubar for good, no certain way to check a MAF with multimeter, with a scanner on live inputs eventually if you know the correct reading range for it
Yes, that's what it means and no diag tool would clear permanent codes
Agree totally. many cleaners leave a deposit which you really flipping don't need on a MAP etc.
Hi, unplugging the MAF works for almost all diesel vehicles to rule the sensor out as the default keeps the engine running at around 90% performance so usually better than with a faulty MAF which gives erratic readings connected, not the case for MAP/IAT which once unplugged goes to a default with low power just to keep you moving
That can happen in case if the "main" fault is with the MAP/IAT sensor not with the MAF so replace the MAP first then if it runs better you can check with the MAF... to rule out the MAF by unplugging it works only if a faulty MAF is the main cause of the malfunction and all the rest is OK, then if you unplug it the engine would run better but as your's has a IAT fault too this kind of diagnose doesnt work.... maybe you should plug in a more reliable scanner cos once you get a performance error message on the display there should be a fault code logged too in the ECU cos these are related if you see what i mean
Not always the case unplugging the maf, the modern Opel/Nissan/Renault engines can stop running if the maf is messed with ..
Hi, that's why i saidNot always the case unplugging the maf, the modern Opel/Nissan/Renault engines can stop running if the maf is messed with ..
as about your statement about modern Opel/Nissan/Renault engines i can't contradict you... just confirm you speak about diesels cos the petrol engines are a completely different story also on some modern diesels there are MAF/IAT or MAF/AAP sensors not simple MAF sensor which delivers only air flow reading, the unplugging trick doesnt work for these.
i think it makes sense that the MAF/IAT has failed as it does the same thing and perfromsm the same whether its plugged in or not. Also i like your idea about still replacing the MAP first in case its damaged. Which makes me also think - can i troubleshoot the MAP or diagnose it with my meter. i suppose first thing i should do is disconnect that and see if it starts or does the same thing or logs errors etc. i will unplug it now and see if it even starts.
Welcome To LandyZone, the Land Rover Forums!
Here at LandyZone we have plenty of very knowledgable members so if you have any questions about your Land Rover or just want to connect with other Landy owners, you're in the right place.
Registering is free and easy just click here, we hope to see you on the forums soon!
