Engine Error
P0408
Exhaust Gas Recirculation Sensor B Circuit High
Severity
Medium
Symptoms
Stalling at stops, surging at low speeds, check engine light
Common Causes
- Short to power in EGR sensor B circuit
- Defective EGR sensor
- EGR valve stuck partially open
- PCM fault
How to Fix
- 1 Fix shorted wiring
- 2 Replace EGR valve
- 3 Clean intake and EGR valve of carbon
- 4 Diagnose PCM
Estimated Repair Cost
USD
$80
–
$350
EGR Valve replacement: $200 - $350