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P0045: Turbocharger/Supercharger Boost Control A Circuit/Open

Severity
Medium
System
Fuel and Air Metering
Last reviewed: Last updated:

Methodology: We combine code standards with complaint and reliability patterns, then review for clear, vehicle-first diagnosis steps.

Sources: SAE/OBD-II definitions, manufacturer service information, and public reliability reports (including NHTSA where applicable).

Limits: Guidance is informational and may not match every model-year or revision. Confirm with the official manual and diagnostics before replacing parts. For safety-critical or electrical work, use a qualified technician.

What Does P0045 Mean?

P0045 is a diagnostic trouble code indicating: Turbocharger/Supercharger Boost Control A Circuit/Open. This code relates to the fuel and air metering system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

Symptoms of P0045

Common Causes

Frequently Asked Questions

What does P0045 mean?
P0045 indicates: Turbocharger/Supercharger Boost Control A Circuit/Open. The vehicle's computer has detected that the Turbocharger/Supercharger Boost Control A is not operating within its expected parameters and stored this diagnostic trouble code.
Can I drive with code P0045?
You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P0045 for extended periods may cause additional problems.
How much does it cost to fix P0045?
Repair costs for P0045 typically range from $80 to $300, depending on the root cause. Simple wiring or connector repairs are on the lower end, while component replacement costs more. A proper diagnosis ($80–$150 at most shops) will identify the exact cause before committing to expensive parts.

What To Do Next

Possible Fixes

  • 🔧 Inspect and repair Turbocharger/Supercharger Boost Control A wiring and connectors
  • 🔧 Replace faulty Turbocharger/Supercharger Boost Control A
  1. 1
    Find your vehicle above

    Click your make and model for real owner reports and common causes specific to your vehicle.

  2. 2
    Check for recalls

    Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.

  3. 3
    Get a professional diagnosis

    A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.

Related Codes

P0001 Fuel Volume Regulator A Control Circuit/Open P0002 Fuel Volume Regulator A Control Circuit Performance P0003 Fuel Volume Regulator A Control Circuit Low P0004 Fuel Volume Regulator A Control Circuit High P0005 Fuel Shutoff Valve A Control Circuit/Open P0006 Fuel Shutoff Valve A Control Circuit Low P0007 Fuel Shutoff Valve A Control Circuit High P0008 Engine Position System Performance Bank 1 P0009 Engine Position System Performance Bank 2 P000A A Camshaft Position Slow Response Bank 1