Fault codes and what they mean
Plain-language meanings of common OBD fault codes, how serious they are and common causes.
Ignition and misfire
Fuel mixture
Catalytic converter
EGR
Diesel particulate filter (DPF)
- P2002Particulate Filter Efficiency Below Threshold Bank 1Warning
- P2463Particulate Filter Restriction - Soot Accumulation Bank 1Warning
- P242FParticulate Filter Restriction - Ash Accumulation Bank 1Warning
- P244AParticulate Filter Differential Pressure Too Low Bank 1Warning
- P244BParticulate Filter Differential Pressure Too High Bank 1Warning
- P2452Particulate Filter Pressure Sensor A CircuitWarning
- P2453Particulate Filter Pressure Sensor A Circuit Range/PerformanceWarning
Turbo boost
Fuel pressure
Glow plugs
Air flow and pressure sensors
Oxygen (lambda) sensor
Cooling and thermostat
Crankshaft and camshaft sensors
Throttle and pedal
Fuel vapour (EVAP)
SCR and AdBlue
Battery and charging voltage
Speed and idle
Transmission
Module communication
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