The engine limp mode is a protective system activated by the ECU when a serious fault is detected. It deliberately limits power to prevent mechanical dama…
Power Loss
Slow acceleration, choked engine, or lack of responsiveness? This section covers the most common causes of engine power loss: mass airflow sensor, turbo, injection, DPF, or electronic issues.
What to Do When the DPF Warning Light Comes On
The DPF warning light (Diesel Particulate Filter) illuminates when the emissions system detects a clogging of the filter. This issue is common in diesel e…
Code P0420 – Insufficient Catalyst Efficiency: Causes and Solutions
The P0420 fault code indicates that the engine control unit has detected insufficient efficiency of the catalyst. This issue is common and typically trigg…
Code P0171 – Lean Mixture: Causes and Solutions
Code P0171 indicates that the engine is running with a lean mixture (too much air, not enough fuel). This fault is quite common in petrol engines and can …