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P0638 — Throttle Actuator Control Range/Performance (Bank 1)

Electronic throttle body not responding correctly to commands.

Severity: HighRepair: $100-$600Difficulty: Medium

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Common symptoms of P0638

Common causes of P0638

Repair cost & difficulty

Typical cost to fix P0638: $100-$600 · Difficulty: Medium

Pro tip: Clean throttle body first.

Vehicles commonly affected

All makes

Related trouble codes

P2101P2135

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ScanFixAI is a diagnostic aid, not a substitute for professional repair. Cost estimates are typical ranges and vary by vehicle and region.