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2020 MAZDA MAZDA3
2.5L Skyactiv-G I4 (186 hp)•AWD•AUTOMATIC•gas
2 active safety recalls on this vehicle — view recalls
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Repairs0Labor987Torque6478Fluid16DTC2264Battery2Maintenance0Recalls2
P1121moderate severityPowertrain

TPS Signal Not Consistent with MAF Signal

on 2020 Mazda Mazda3 2.5L Skyactiv-G I4 (186 hp) · AWD

What this code means

The Throttle Position sensor and Mass Air Flow sensor readings do not agree with each other. When the throttle shows a certain opening, the MAF does not confirm the expected airflow volume.

Symptoms

  • Check Engine Light
  • Poor acceleration
  • Rough idle
  • Hesitation
  • Poor fuel economy

Common causes

  • Dirty or faulty MAF sensor
  • Faulty TP sensor
  • Vacuum leak allowing unmetered air
  • Restricted air filter
  • Intake air leak between MAF and throttle body

Diagnostic steps

  1. Compare TP and MAF readings simultaneously on scan tool
  2. Clean MAF sensor
  3. Check for vacuum leaks
  4. Test TP sensor through full range
  5. Replace air filter if restricted

Repair notes

Clean the MAF sensor; check for vacuum leaks and replace the faulty sensor.

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