Turbocharger Boost Control 'B' Position Exceeded
The P2595 code means the vehicle's onboard diagnostic system has detected: Turbocharger Boost Control 'B' Position Exceeded. This is a critical severity code.
- Keep driving?
- No — stop driving
- DIY difficulty
- hard
- Estimated cost
- $400 - $2500 (parts and labor)
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What Are the Symptoms of P2595?
- Check Engine Light on
- Overboost from secondary turbocharger
- Engine detonation or knock
- Severe limp mode
- Risk of catastrophic engine failure
What Causes P2595? (Most Likely First)
- Secondary turbo wastegate stuck closed Very High
- Boost control valve for secondary turbo failed High
- Control solenoid short causing continuous boost Moderate
- PCM overboost protection malfunction Low
Can I Still Drive with P2595?
No — stop driving. P2595 is rated critical severity. Continuing to drive in this state risks further damage — get it looked at before your next trip.
Frequently Asked Questions
What does P2595 mean?
P2595 indicates an issue with the turbocharger boost control 'b' position exceeded. This affects the PCM's ability to properly control turbocharger boost levels.
Can I drive with a P2595 code?
Do not drive with this code. An overboost condition can cause catastrophic engine damage including blown head gaskets or cracked pistons.
How much does it cost to fix P2595?
Repairs typically cost $400 - $2500, depending on the specific component that has failed.
Mechanics Guide Step-by-step diagnosis
How Do You Diagnose P2595?
-
Read freeze frame data and confirm P2595 is stored
-
Verify actual boost levels with mechanical gauge
-
Test secondary turbo wastegate operation manually
-
Inspect boost control solenoid and wiring for shorts
Sources 1
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)
Which Vehicles Commonly Get P2595?
- 2011-2019 Ford F-150 3.5L EcoBoost
- 2012-2018 BMW 535i 3.0L Twin-Turbo
- 2013-2020 Porsche 911 Turbo 3.8L
- 2014-2019 Audi S6 4.0T
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