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.
"Bank 1 is running rich: too much fuel for the air going in. The ECU has been taking fuel out to correct it and has run out of room. This is mostly a petrol code. Start with the cheap checks. Is the air filter badly clogged? Is the coolant temperature reading right? A sensor that thinks the engine is cold makes the ECU add fuel. A purge valve stuck open can feed fuel vapour in too. After those, look at a leaking injector, fuel pressure that's too high, or the airflow sensor reading high. If you also see P0175, the cause is likely something both banks share."
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:
Bank 1 is running rich: too much fuel for the air going in. The ECU has been taking fuel out to correct it and has run out of room. This is mostly a petrol code. Start with the cheap checks. Is the air filter badly clogged? Is the coolant temperature reading right? A sensor that thinks the engine is cold makes the ECU add fuel. A purge valve stuck open can feed fuel vapour in too. After those, look at a leaking injector, fuel pressure that's too high, or the airflow sensor reading high. If you also see P0175, the cause is likely something both banks share.
Usually, yes, in the short term. Whether it's safe really depends on whether it comes with other symptoms. If the car drives normally, get it checked soon rather than leaving it. If it runs rough, smells strongly of fuel or the engine light starts flashing, ease off and stop when it's safe to.
Running rich wastes fuel, can foul spark plugs and, over time, can damage the catalytic converter. If the engine light starts flashing, that usually means a misfire. Ease off and stop when it's safe to.
Worse fuel economy, a strong fuel smell from the exhaust, black smoke or a sooty tailpipe, rough idle and sometimes misfires. Some cars show no obvious signs and only set the code.
It can, if the front oxygen sensor is reading wrongly. It's less common than the causes above, so rule out the air filter, coolant sensor and purge valve first.
An air filter or oil change is cheap. A coolant temperature sensor is often a modest part. A purge valve or MAF sensor is mid-priced. Injectors or fuel system parts are the expensive end, and vary a lot by car.
Free app. Plug in, and get every code in plain English, plus the connections you'd never spot.