P0371 - Timing Reference High Resolution Signal B Range/Performance

The ECM detected a timing-reference signal B problem: range/performance.

Code first. Confirm symptoms and checks before pricing parts.

Code Overview

The ECM detected a timing-reference signal B problem: range/performance.

Common Causes

• Reference sensor problem
• Damaged wiring or connector
• Reluctor or timing signal issue

Diagnostic Steps

1. Inspect timing-reference wiring and connectors
2. Check signal integrity with scan data or scope if available
3. Look for related crank or cam sensor faults

Likely Repairs & Cost Guides

Confirm the repair path before pricing parts.

Related OBD Codes

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Next Steps

Move from code to checks, then estimate.