OBD Guide
ENFRDEESPT

P10B9

Mass Air Flow Sensor Barometric Pressure Sensor Signal Message Counter Incorrect Bank 1

P10B9 is an OBD-II diagnostic trouble code meaning: Mass Air Flow Sensor Barometric Pressure Sensor Signal Message Counter Incorrect Bank 1. Common causes: maf sensor malfunction, damage to the wiring harness to the sensor. Estimated repair cost: $33–89.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$33–89 (est.)

Symptoms

  • Unstable engine operation at idle
  • Reduced engine power
  • Increased fuel consumption
  • Check Engine Light Illuminates
  • Dips during acceleration

Causes

  • MAF sensor malfunction
  • Damage to the wiring harness to the sensor
  • Poor contact in the sensor connector
  • Contact corrosion
  • Problems with ECU software

How to Fix

  1. Check the integrity of the wiring harness to the mass air flow sensor
  2. Clean sensor connector contacts
  3. Check the sensor readings using a scanner
  4. Replace the MAF sensor if necessary
  5. Update ECU firmware if updates are available

Related codes

P0100P0101P0102

FAQ

What does the P10B9 code mean?

P10B9 is an OBD-II diagnostic trouble code that indicates: Mass Air Flow Sensor Barometric Pressure Sensor Signal Message Counter Incorrect Bank 1

What causes a P10B9 error code?

The most common causes of P10B9 include: MAF sensor malfunction; Damage to the wiring harness to the sensor; Poor contact in the sensor connector; Contact corrosion.

How do I fix a P10B9 diagnostic trouble code?

To fix P10B9: Check the integrity of the wiring harness to the mass air flow sensor. Clean sensor connector contacts. Check the sensor readings using a scanner. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P10B9?

Yes, but get it checked soon

How much does it cost to fix P10B9?

The estimated repair cost for P10B9 is $33–89. Actual cost depends on your vehicle, location, and labor rates.

FRDEESPT

See also: Russian version · NationStat