A fault code doesn’t yet mean the unit or sensor itself is faulty: often it’s the plug and connector leading to it.
Possible causes
- A cracked hose, intake gasket or vacuum hose
- PCV valve
- The brake booster vacuum hose
What you can do yourself
- Listen at idle: a hissing sound means an air leak.
- Look at the fuel trims on the “Sensors” tab.
Stop and don’t drive on if:
- The Check Engine light is flashing
- The temperature gauge is in the red or the overheating light is on
- The red oil pressure light is on
- Smoke from under the bonnet, a burning or petrol smell
- Strong jerking, knocking from the engine, or the car barely moves
The explanation comes from the error code reference in the AvtoElektrik PRO app.