BMW P1101

OBD Codes


Description of the defect

Mass Air Flow (MAF) Sensor Out of Self
The MAF sensor circuit is monitored by the PCM for an out of range air flow (or voltage) input. If during key ON engine OFF the air flow voltage signal is greater than 0.27 volts the test fails. Likewise, if during key ON engine running, an air flow voltage signal is not within 0.46 volt to 2.44 volts, the test fails.

Possible causes

List of elements that might trigger the appearance of this code

  • Low battery charge
  • MAF sensor partially connected
  • MAF sensor contamination
  • PWR GND open to MAF sensor
  • MAF RTN circuit open to PCM
  • Damaged MAF sensor
  • Damaged PCM

Diagnostic help

Some tricks to help us for the diagnosis of the failure

A MAF V PID reading greater than 0.27 volts (KOEO) or a MAF V PID reading outside the 0.46 volt to 2.44 volts range (KOER) indicates a hard fault.
The Carbon Cleaning ?
Prevents maintenance on engine problems

Preventive engine cleaning enables you to restore engine parts rather than replacing them, thereby saving vehicle owners on costly parts, such as a new turbocharger ($ 1.350 - 3.100), catalytic converter ($ 600 - 2.000), DPF ($ 600 - 2.000) or EGR valve ($ 370 - 500).

These problems result mainly from poor combustion, which stifles the engine.

So before replacing your engine parts, try Carbon Cleaning. A dirty engine as the result of carbon deposits is the new threat to vehicle performance.

Make your online diagnosis

Center Locator
Find the Carbon Cleaning center closest to you
With the Carbon Cleaning solution,
you can help extend the life of your car engine
without the need to replace so many expensive parts.
Locate a center
near you :
Become a distributor-partner of Carbon Cleaning
As a member of the Carbon Cleaning network,
you are an independent vendor. To help you grow
your business, we put all of our experience and expertise
at your disposal.
Contact us with any questions
or for more information about how to become a partner.
Professional Information and Contact
Already have a Carbon Cleaning Pro account? Sign in!