KlaroP0400
MODERATEExhaust Gas Recirculation Flow Malfunction
What this code means
Exhaust Gas Recirculation Flow Malfunction. Catalytic converter, exhaust gas recirculation, particulate filter, fuel vapour. These faults rarely leave you stranded, but they fail the roadworthiness test and become expensive if left alone.
How to read this code
- PPowertrain
- 0standardised code
- 4Emission controls
- 00P0400
The letter P names the system: Powertrain. The digit 0 that follows marks a standardised code, shared by all manufacturers code. The next digit, 4, locates the fault: emission controls.
What to do
Have it checked this week. The car remains usable, but the fault will not clear itself and will fail the roadworthiness test.
Clearing a code switches the light off but repairs nothing: if the fault remains, the code comes back.
Nearby codes
- P0401Exhaust Gas Recirculation Flow Insufficient Detected
- P0402Exhaust Gas Recirculation Flow Excessive Detected
- P0403Exhaust Gas Recirculation Circuit Malfunction
- P0404Exhaust Gas Recirculation Circuit Range/Performance
- P0405Exhaust Gas Recirculation Sensor A Circuit Low
- P0406Exhaust Gas Recirculation Sensor A Circuit High
- P0407Exhaust Gas Recirculation Sensor B Circuit Low
- P0408Exhaust Gas Recirculation Sensor B Circuit High