Pick a colour. The page changes, like the app does.
Officially? A wall of jargon. To most people? Absolutely nothing. That's exactly why we built the app.
Plug into any code reader and you'll get the same line every other app shows you. Technically correct. Practically useless.
"The airflow (MAF) sensor's signal is lower than it should ever be with the engine running, low enough to look like a circuit fault rather than a sensor that's a bit off. Start with the plug: a loose, corroded or damaged connector, or a broken wire, is the cheapest and a common cause. Then check the intake for a pipe that's come off or badly split near the sensor. If the wiring is sound, the sensor itself may have failed. The car may hesitate, idle badly or, especially on diesels, go into limp mode. A dirty sensor more often sets P0101 or a lean code, but a clean is cheap and worth doing while you're in there."
Worth checking in roughly this order. Don't jump straight to the expensive fix:
The code itself is a snapshot. The fault sets after the car's watched the numbers over a whole drive cycle. Here's what's worth keeping an eye on:
Live simulation on the readings our free demo drive supports. This is how the app’s dials move.
Codes rarely tell the whole story. The clever part is reading them together, and against your exact car. Here's the kind of thing it catches:
The airflow (MAF) sensor's signal is lower than it should ever be with the engine running, low enough to look like a circuit fault rather than a sensor that's a bit off. Start with the plug: a loose, corroded or damaged connector, or a broken wire, is the cheapest and a common cause. Then check the intake for a pipe that's come off or badly split near the sensor. If the wiring is sound, the sensor itself may have failed. The car may hesitate, idle badly or, especially on diesels, go into limp mode. A dirty sensor more often sets P0101 or a lean code, but a clean is cheap and worth doing while you're in there.
Usually, yes, though it may not run well. Without a good airflow signal, the engine works off estimates for fuelling, so it may hesitate or idle badly. Some cars, diesels especially, cut power or go into limp mode. If yours does, stay off fast roads and get it checked.
Sometimes, but for this code check the plug and wiring first. P0102 is about the signal being too low, which is more often a connection or a failed sensor than dirt. Cleaning is cheap, so it's still worth a go.
A cleaned or reseated connector costs nothing. A new MAF sensor is often around £50 to £150 depending on the car. Buy a decent-quality one, as cheap copies can cause their own faults.
Free app. Plug in, and get every code in plain English, plus the connections you'd never spot.