P00C1: Turbocharger/Supercharger Bypass Valve B Control Circuit Low

Severity

Medium

System

Fuel and Air Metering

Last reviewed: Jan 1, 0001 Last updated: Jan 1, 0001

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 P00C1 Mean?

P00C1 is a diagnostic trouble code indicating: Turbocharger/Supercharger Bypass Valve B Control Circuit Low. 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 P00C1

⚠️ Check Engine Light (MIL) illuminated
⚠️ Turbocharger/Supercharger Bypass Valve B reading at zero or minimum value
⚠️ Related system not functioning or in fail-safe mode
⚠️ Poor fuel economy

Common Causes

🔍 Open or broken wire in Turbocharger/Supercharger Bypass Valve B circuit
🔍 Poor ground connection at Turbocharger/Supercharger Bypass Valve B
🔍 Faulty Turbocharger/Supercharger Bypass Valve B with no output signal
🔍 Disconnected or loose Turbocharger/Supercharger Bypass Valve B connector
🔍 Blown fuse in related circuit

Frequently Asked Questions

What does P00C1 mean?

P00C1 indicates: Turbocharger/Supercharger Bypass Valve B Control Circuit Low. The vehicle's computer has detected that the Turbocharger/Supercharger Bypass Valve B is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P00C1?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P00C1 for extended periods may cause additional problems.

How much does it cost to fix P00C1?

Repair costs for P00C1 typically range from $20 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

🔧 Repair broken wire or restore ground in Turbocharger/Supercharger Bypass Valve B circuit
🔧 Clean and secure Turbocharger/Supercharger Bypass Valve B connector and ground points
🔧 Replace failed Turbocharger/Supercharger Bypass Valve B

1
Find your vehicle above
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2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
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