OBD Guide
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P0100

Mass or Volume Air Flow Sensor A Circuit

P0100 is an OBD-II diagnostic trouble code meaning: Mass or Volume Air Flow Sensor A Circuit. Common causes: contamination of the sensor element of the air flow sensor, failure of the mass air flow sensor itself. Estimated repair cost: $17–89.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$17–89 (est.)

Symptoms

  • Unstable engine idling
  • Loss of power when accelerating
  • Increased fuel consumption
  • Black smoke from the exhaust pipe
  • Difficulty starting the engine
  • Jerks and dips when pressing the gas pedal
  • Check Engine Light Illuminates

Causes

  • Contamination of the sensor element of the air flow sensor
  • Failure of the mass air flow sensor itself
  • Damage to the wiring or sensor connector
  • Air leak after mass air flow sensor
  • Dirty air filter
  • Engine control unit malfunction
  • Mechanical damage to the sensor housing

How to Fix

  1. Read error codes and analyze data in real time
  2. Check the condition of the air filter, replace if necessary
  3. Inspect the air flow sensor for dirt and mechanical damage
  4. Clean the sensor with a special cleaner for the mass air flow sensor.
  5. Check the integrity of the wiring and the reliability of the connector connections
  6. Check the tightness of the air path after the sensor
  7. Measure the resistance and voltage at the sensor terminals
  8. If necessary, replace the mass air flow sensor with a new one
  9. Clear error codes and test drive

Related codes

P0101P0102P0103P0104P0171P0172P0174P0175

Error P0100 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P0100 code mean?

P0100 is an OBD-II diagnostic trouble code that indicates: Mass or Volume Air Flow Sensor A Circuit

What causes a P0100 error code?

The most common causes of P0100 include: Contamination of the sensor element of the air flow sensor; Failure of the mass air flow sensor itself; Damage to the wiring or sensor connector; Air leak after mass air flow sensor.

How do I fix a P0100 diagnostic trouble code?

To fix P0100: Read error codes and analyze data in real time. Check the condition of the air filter, replace if necessary. Inspect the air flow sensor for dirt and mechanical damage. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P0100?

Limited driving only, diagnose soon

How much does it cost to fix P0100?

The estimated repair cost for P0100 is $17–89. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat