P0408 - Exhaust Gas Recirculation Sensor B Circuit High

The EGR sensor B signal is higher than expected.

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Common Next Steps

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Related Inspection

Code Overview

The EGR sensor B signal is higher than expected.

Common Causes

• Failed EGR sensor
• Short to voltage
• Damaged wiring or connector

Diagnostic Steps

1. Inspect the EGR sensor connector and wiring
2. Check signal voltage against expected range
3. Inspect for carbon buildup or sticking components

Likely Repairs & Cost Guides

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Related OBD Codes

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Next Steps

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