Please support us by a like for our facebook page

We also offer you free PIN CODES there

Thank you

about products members Download forum contact

OBD II Fault Code P1103 :

Description of OBD II Fault code P1103

MASS AIR FLOW (MAF) SENSOR SIGNAL HIGHER THAN EXPECTED

Possible failuer of OBD II Fault code P1103

  • MAF Sensor output failure
  • Intake Air leak
  • EGR Valve Actuator Position Stuck

Diagnostic Procedure using AutoHex auto Scan tool tester

  • The ratio between the target value of the MAF Sensor and the output value of the sensor is monitored in the EGR inactive field. (Amount of monitor = Sensor output value / Presumed value)

Test Conditions using AutoHex Scan tool tester

  • Baro > 0.000 hPa
  • 70deg < Engine Coolant Temperature (ECT)
  • IAT1 variation < 10 degC/sec
  • Fuel injection quantity < 0 mg
  • 90 < Intake Shutter position < 110 %
  • 0 < Swirl position < 90 deg
  • EGR complete shutting > 1000 msec
  • Engine running
  • 2 sec > Engine starting
  • 1500 < Ne < 3500 rpm
  • P0102, P0103, P1102, P1103, P1401, P2228, P2229, P1069, P0045, P0047, P0048, P1027, P0107, P0108, P0116, P0126, P0117, P0118, P0403, P0489, P0490, P1405, P0097, P0098, P2199, P0652, P0653, P2004, P2006, P2008, P2009, P2010, P1028, P2016 and P2017 are not detected.

Clear Fault codes Conditions

  • The ratio between the target value of the MAF Sensor and the output value of the sensor is monitored in the EGR inactive field. (Amount of monitor = Sensor output value / Presumed value)

MIL Status

  • Check Engine Light ON


Note:

  • AutoHex is a professional OBD /OBD II diagnostic scanner / scan tool tester.
  • This fault code is a GERENRIC fault code, some cars may change the meaning of this fault code.
    To get the accurate fault code description you may use AutoHex OBD scanner

More OBD II Fault codes:

OBD II Fault Code P1104
OBD II Fault Code P1105
OBD II Fault Code P1106
OBD II Fault Code P1107
OBD II Fault Code P1108
OBD II Fault Code P1109
OBD II Fault Code P110A
OBD II Fault Code P110B
OBD II Fault Code P110C
OBD II Fault Code P110D
AutoHex Auto Scan Tool
Automotive Scan Tool
With AutoHex onboard diagnostic scan tool you can change the configurations of the car by the professional special functions in HexDiag software
AutoHex Scan Tool Forum
Scan Tool Forum
Join AutoHex Onboard Diagnostic Scan Tool Forum to share useful information about using onboard diagnostic Scan Tools functions and other tips
AutoHex Scan tool Fault Codes Finder Automotive Technical Info Car Electronics Car Sensors
Car Actuators Mercedes Benz onboard Systems Mercedes Technical Info