Condition For Fault ID - 3

2B42 - P0301

Information saved in
DME

Fault code
2B42 - P0301

Fault text
Misfire impairing exhaust emission, cyl. 1

Fault description
Cylinder 1 Misfire Detected

Condition for fault identification
Test condition:
Ionic current integral in miss window less than a load and
rpm-dependent threshold
Terminal condition: Terminal 15
Voltage condition:
none

Condition for fault memory entry
Varies according to load and rpm

Action in service
1. Note additional fault memory entries. Miss can also be
collateral malfunction!
2. Inspect spark plug, to localize malfunction source
exchange with other plug or replace
3. Switch ignition coil with other coil or replace to localize
malfunction source
4. Check fuel supply
5. Fuel

Fault effect and breakdown warning
CC message
Engine speed limited
Reduced power
MIL after engine runs 2x
Rough idle

Driver information
Warning light:
MIL

Service instruction
none