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2006 MAZDA MPV
3.0L V6•FWD•AUTOMATIC•gas
2 active safety recalls on this vehicle — view recalls
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Repairs0Labor486Torque3100Fluid7DTC1789Battery1Maintenance0Recalls2
P0173moderate severityPowertrain

Fuel Trim Malfunction (Bank 2)

on 2006 Mazda MPV 3.0L V6 · FWD

What this code means

The PCM detects that fuel trim for bank 2 is outside the acceptable range. This indicates the engine is running too lean or too rich on that bank.

Symptoms

  • Check engine light on
  • Rough idle
  • Reduced fuel economy

Common causes

  • Vacuum or intake air leak
  • Faulty oxygen sensor
  • Faulty mass air flow sensor
  • Fuel pressure problems

Diagnostic steps

  1. Scan for stored codes and freeze frame
  2. Check short and long term fuel trims
  3. Inspect for vacuum and intake leaks
  4. Test MAF sensor and fuel pressure
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