Free API
P0034moderate severityPowertrain

Turbocharger/Supercharger Bypass Valve Control Circuit Low

on 2014 Ram 2500 6.7L I6 Cummins Diesel · 4WD

What this code means

The computer sees low voltage in the turbo/supercharger bypass valve circuit. This usually indicates a short to ground or failed valve affecting boost.

Symptoms

  • Low boost pressure
  • Poor acceleration
  • Check engine light on

Common causes

  • Short to ground in wiring
  • Faulty bypass valve solenoid
  • Damaged connector
  • Failed control module

Diagnostic steps

  1. Retrieve fault codes
  2. Check wiring for short to ground
  3. Test valve resistance
  4. Verify control circuit voltage

Other Powertrain codes on this vehicle

🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years. Spot an error? Use the Help link above — a human reads every report.
Stuck on this repair? Take it to The Diag Desk — ask a master tech about this exact car → real human answer within 24h, never AI
🔓 LIBERATED FOREVER
The 2014 Ram 2500 6.7L I6 Cummins Diesel repair data is free for every DIYer and shop on earth, permanently, because Anonymous Sponsor paid $99 to unlock it.
Mitchell1 charges $169/mo for this. ALLDATAdiy charges $30/yr per vehicle. Open Labor Project is free permanently, because of community sponsors like Anonymous.
Free another vehicle →
Building an app?
Free API access to all this data — 10 requests/day, no card required.
Get an API key →
Run a shop?
Manage repairs, estimates, and customers with ShopBase — $249/mo, all features included.
Try ShopBase →