P0100

Read the instructions below then start the fault diagnostic procedure.

Symptom: CHECK ENGINE goes on after two driving cycles. Engine speed drops slower than normal when accelerator pedal is released. Misfiring can occur before trouble code is generated.

P0100

Fault symptoms

•	CHECK ENGINE goes on after two driving cycles.

•	Engine speed drops slower than normal when accelerator pedal is released.

•	Misfiring can occur before trouble code is generated.

Conditions

The following conditions apply for this DTC:

•	Crankshaft rotating and main relay voltage exceeding 10V.

•	No frequency for more than 0.5 s.

Diagnostic help

Fault diagnosis concerns an electrical fault in connecting leads or in the sensor.

Functions in the diagnostic tool related to the fault are:

•	Mass air flow sensor value, unit g/s.

•	Air mass deviation from calculated, unit %.

See also description of test readings, , for more information.

Checking the wiring

Jiggle the wiring harness at several points and in different directions to detect intermittent breaks and short circuits. Observe the multimeter, diagnostic tool or test lamp during the check.