Manufacturer Code Charts: 140401
140401 - P0304Information saved in
DME
Fault code
140401 - P0304
Fault text
Misfire, cylinder 4: injection is cut out
Fault description
The diagnostic function monitors the duration of the
combustion strokes and compares them with the remaining
cylinders by assessing the rpm signals (segment periods).
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):
- Collateral fault logged, from problem with mixture
formation, ignition system or mechanism.
Terminal condition: none
Voltage condition:
- Onboard electrical system voltage between 9 V and 16 V
Temperature condition:
- None
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
- Because this is a secondary fault, start by repairing the
primary faults
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
- ECE electronic engine power reduction: on
- CC message: on
- US emissions warning lamp: on
- US electronic engine power reduction: on
- CC message: on
Service instruction
None