Turbo/Super Charger Bypass Valve Control Circuit Range/Performance (Bank 2)
The P0039 code means the vehicle's onboard diagnostic system has detected: Turbo/Super Charger Bypass Valve Control Circuit Range/Performance (Bank 2). This is a moderate severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- hard
- Estimated cost
- $250 - $700 (parts and labor)
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What Are the Symptoms of P0039?
- Check Engine Light on
- Inconsistent boost from Bank 2 turbo
- Reduced power under acceleration
- Possible surge or flutter from turbocharger
What Causes P0039? (Most Likely First)
- Sticking bypass valve on Bank 2 turbo Very High
- Vacuum leak at bypass valve actuator High
- Faulty bypass valve solenoid Moderate
- Wiring issue in bypass valve circuit Moderate
Can I Still Drive with P0039?
Short distances only. P0039 is rated moderate severity. Keep trips short and get it diagnosed soon rather than waiting for symptoms to worsen.
Frequently Asked Questions
What does P0039 mean?
P0039 indicates the Bank 2 turbo or supercharger bypass valve is not operating within its expected range, causing inconsistent boost control.
Why does my car have Bank 2?
Bank 2 refers to the side of the engine that does not contain cylinder 1. Vehicles with V-type or flat engines have two banks, and some have twin turbos with one per bank.
How much does it cost to fix P0039?
Repairs typically cost between $250 and $700, depending on whether the valve, solenoid, or wiring needs replacement.
Mechanics Guide Step-by-step diagnosis
How Do You Diagnose P0039?
-
Confirm P0039 with scan tool and review freeze frame data
-
Inspect Bank 2 turbo bypass valve for sticking or damage
-
Check vacuum lines to bypass valve actuator for leaks
-
Test bypass valve solenoid resistance and operation
Sources 2
This page is built from documented references. Verify against your own service info before repair work.
- SAE J2012Diagnostic Trouble Code Definitions (defines the generic OBD-II code ranges)
- Cross-checked against the SAE J2012:2002 DTC table (2026-08-27)archived scan of the SAE standard — readable copy, not SAE’s current edition
Which Vehicles Commonly Get P0039?
- 2011-2018 BMW 335i
- 2010-2017 Audi S4 3.0T
- 2013-2020 Ford F-150 3.5L EcoBoost
- 2012-2019 Porsche 911 Turbo
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