MAF (Mass Air Flow) meter sits in the collar in the air ducting after the air filter/cleaner housing. It has a plastic box on top to which the electrical multi-connector attaches. Disconnect the plug and remove the MAF housing from the ducting. Use electrical cleaning spray only. Carb choke cleaner will be too harsh. Electrical cleaner spray can be got from any electronic retailer such Maplin, RS components or Radio Shack etc. Not only is this an exceptional solvent cleaner it leaves absolutely no residue. Spray the MAF element (foil) and allow everything to dry. Avoid the temptation to touch the element as it can be easily damaged. Only if absolutely necessary should you use a cotton ear bud and rub very gently to help remove stubborn dirt, always use plenty of spray and use a clean tissue beneath the MAF work area to catch drips and assess the degree to which dirt is being 'washed' away. Before reconnecting the MAF check the connecting pins in the plug and corresponding socket for signs of any dirt, a quick squirt with the electrical cleaner should help here too. If there are signs of corrosion rub the connections with some wire wool to ensure a fresh metal to metal contact.
Hi there:
DTC P0174 - System Too Lean (Bank 2) This DTC is very similar to P0171, and in fact your vehicle may show both codes at the same time.
A code P0174 may mean that one or more of the following has happened:
Possible solutions include:
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