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
- Poor contact in the connector: corrosion or a loose terminal
- A chafed wire shorts out over bumps or from vibration
- The sensor itself
What you can do yourself
- Inspect the connector and wires: corroded terminals, chafed insulation. Clear the code and see whether it comes back.
- The sensor is usually built into the flap actuator. Check the connector and that the flaps move freely without sticking.
- Usually the car drives as before; a diesel may go into limp mode with weak pull.
OOleg’s tip: check the connector
Often the cause is simple — there is no contact in the connector (plug). Look at the connector from the back: remove the rubber seal and you will see whether a wire is corroded or has come off completely. Corrosion shows up as green deposits. Ideally, gently pull each wire towards you one at a time: a sound wire stays in place, while a corroded one simply comes off — it needs to be repaired.
Unplug and inspect connectors with the ignition off.
Bank 1 is the side of the engine with cylinder 1. An inline engine only has bank 1.
The explanation comes from the error code reference in the AvtoElektrik PRO app.