Manufacturer Code Charts: 140301

140301 - P0303

Information saved in
DME

Fault code
140301 - P0303

Fault text
Misfire, cylinder 3: injection is cut out

Fault description
The diagnostic function monitors the duration of the
combustion strokes and compares them with those of the
remaining cylinders by assessing the rpm signals.

Condition for fault identification
Test condition:
The fault is recognized when the combustion stroke in a
particular cylinder is slower than the combustion strokes on
the other cylinders.
Potential problem source(s):
- Defect in mixture formation
- Defect in ignition system
- Mechanical defect
- Defective DME
Terminal condition: none
Voltage condition:
- Electrical system voltage > 10 V
Temperature condition:
- Coolant temperature > -20 °C
Time condition:
- None
Other conditions:
- Engine on

Condition for fault memory entry
The diagnostic fault code is logged when a specific number
of combustion miss events are recognized within 200
crankshaft revolutions. The number depends on rpm and
load factor.

Action in service
- Conduct fault diagnosis using the 'Combustion miss' test
module

Fault effect and breakdown warning
Breakdown notice:
- The engine reverts to its limp-home program, continued
vehicle operation is possible but drivability is restricted,
because power is reduced the driver should refrain from
passing maneuvers.
Possible apparent symptoms:
- Reduced engine power

Driver information
Warning light:
- ECE emissions warning lamp: on
- US emissions warning lamp: on
- ECE electronic engine power reduction: off
- US electronic engine power reduction: off
- CC message: none

Service instruction
- none