P0103
Read the instructions below then
start the fault diagnostic procedure.
Symptom: CHECK ENGINE comes on after two driving cycles.
Engine speed drops slower than normal when the accelerator is released.
Possible misfiring before DTC is generated.
Mass Air Flow Circuit. High Input.
Fault symptoms
|
•
|
CHECK ENGINE comes on after two driving cycles.
|
|
•
|
Engine speed drops slower than normal when the accelerator is released.
|
|
•
|
Possible misfiring before DTC is generated.
|
Conditions
The following conditions apply for this DTC:
|
•
|
Crankshaft rotating and main relay voltage exceeds 10 V.
|
|
•
|
Frequency higher than 15 kHz for more than 0.5 s.
|
Diagnostic help
The mass air flow sensor sends pulses to the control module but the frequency is too high. The sensor is supplied with current and is connected to the control module input. This DTC indicates an internal fault in the sensor.
Diagnostic tool functions related to this fault are:
|
•
|
Mass air flow sensor reading, in g/s.
|
|
•
|
Airmass deviation from calculated, in %.
|
See also the description of readings under
Menu "Read Values"
for more information.
Check the wiring
|
Note
|
|
Jiggle the leads and in-line connectors at various points and in different directions to detect any intermittent breaks or short circuits in the wiring. Observe the multimeter, test lamp or diagnostic tool while doing this.
|
