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P2179 fault code: what it means

P2179: Engine running lean away from idle on bank 2 (V6/V8). Usually an air leak or weak fuel supply.

Engine and gearbox (powertrain) · Costly if missed

Usual causes, most likely first

  1. intake or breather leak
  2. failing fuel pump
  3. faulty MAF sensor
  4. exhaust leak

P2179 by make

Audi

Engine running lean away from idle on bank 2 (V6/V8). Usually an air leak or weak fuel supply.

Usual causes: intake or breather leak; failing fuel pump; faulty MAF sensor; exhaust leak

Volkswagen

Engine running lean away from idle on bank 2 (V6/V8). Usually an air leak or weak fuel supply.

Usual causes: intake or breather leak; failing fuel pump; faulty MAF sensor; exhaust leak

What the repair usually costs

Not sure what P2179 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.