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P203F fault code: what it means

P203F: AdBlue level reading too low or level sensor fault. Common on VW group diesels; refill first, then check the sender.

Engine and gearbox (powertrain) · Minor

Usual causes, most likely first

  1. AdBlue level low
  2. failed tank level sensor
  3. wiring corrosion
  4. tank pump module failure

P203F by make

Audi

AdBlue level reading too low or level sensor fault. Common on VW group diesels; refill first, then check the sender.

Usual causes: AdBlue level low; failed tank level sensor; wiring corrosion; tank pump module failure

Skoda

AdBlue level reading too low or level sensor fault. Common on VW group diesels; refill first, then check the sender.

Usual causes: AdBlue level low; failed tank level sensor; wiring corrosion; tank pump module failure

Volkswagen

AdBlue level reading too low or level sensor fault. Common on VW group diesels; refill first, then check the sender.

Usual causes: AdBlue level low; failed tank level sensor; wiring corrosion; tank pump module failure

What the repair usually costs

Not sure what P203F means on your car? Ask Credov.

Before you clear it

Write the code down or photograph the scanner first. A code that comes straight back after clearing points to a fault that is still there. A car whose codes were cleared just before you arrived may be hiding one: the scanner's readiness monitors show "not ready" for a while after codes are cleared.

Researched by Credov from manufacturer and workshop sources. A fault code points to where a fault may be; a workshop confirms it with a diagnosis. Browse all fault codes.