What does code P0408 mean?
High signal detected from EGR sensor B
OBD-II Code
P0408 — Exhaust Gas Recirculation Sensor B Circuit High
High signal detected from EGR sensor B
Common symptoms
- Hesitation
- loss of power
Possible causes
- Short circuit
- faulty EGR sensor
Initial recommendation
Inspect wiring and replace EGR sensor if necessary.
Safety notice
This information is for guidance only and does not replace a physical vehicle inspection or diagnosis by a qualified mechanic. If the vehicle has severe power loss, smoke, a fuel odor, overheating, brake or steering problems, or any unsafe behavior, avoid driving it and seek professional inspection.
Analyze this code with MecaOBD
Use the app to combine code P0408 with your vehicle's actual symptoms for more complete diagnostic guidance.
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