BMW P1101

OBD Codes

P1101

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.
 
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