P0046: Turbocharger/Supercharger Boost Control 'A' Circuit Range/Performance
3 vehicles · 3 makes · $200-$7,000 repair
Most Reported On
P0046 is an OBD-II diagnostic trouble code meaning “Turbocharger/Supercharger Boost Control 'A' Circuit Range/Performance.” P0046 is a generic powertrain code indicating a range/performance problem in the turbocharger or supercharger boost-control 'A' circuit — the computer's commanded boost-control signal does not match the actual measured response. This means the boost-control solenoid or actuator is responding too slowly, sticking, or producing implausible feedback rather than a clean electrical short or open. The driver may notice reduced power, surging boost, or a limp mode along with a check engine light. It should be diagnosed to restore proper boost regulation and protect the engine. This code is most commonly reported on 2011-2022 GMC Sierra 3500HD, 2007-2024 RAM 2500 (2500 6.7L Cummins), and 2022-2025 Toyota Tundra, with repair costs ranging from $200 to $7,000.
Common Causes
Typical Repair Cost
Based on 3 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
To diagnose P0046, you'll need an OBD-II scanner. Here are our recommendations at every price point.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple, affordable code reader that reads and clears check engine codes. Great for quick diagnostics on any OBD-II vehicle (1996+).
- Read & clear engine codes
- View freeze frame data
- I/M readiness status
- No batteries or app needed
BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth OBD-II scanner with a free companion app. Provides enhanced diagnostics, smog readiness, and repair reports sourced from a database of verified fixes.
- Enhanced diagnostics (ABS, SRS, transmission)
- Repair Reports with verified fixes
- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X OBD-II Scanner
by LAUNCH
A professional-grade handheld scanner that reads all four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
- Engine, transmission, ABS, SRS diagnostics
- Live data stream & graphing
- AutoVIN for vehicle identification
- Free lifetime updates via Wi-Fi
Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level diagnostic tablet with bi-directional control, active tests, and full system coverage. Ideal for serious DIYers and small shops.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
As an Amazon Associate, we earn from qualifying purchases. Prices are approximate and may vary.
Vehicles Affected (3)
FAQ
What does P0046 mean?
P0046 stands for "Turbocharger/Supercharger Boost Control 'A' Circuit Range/Performance." P0046 is a generic powertrain code indicating a range/performance problem in the turbocharger or supercharger boost-control 'A' circuit — the computer's commanded boost-control signal does not match the actual measured response. This means the boost-control solenoid or actuator is responding too slowly, sticking, or producing implausible feedback rather than a clean electrical short or open. The driver may notice reduced power, surging boost, or a limp mode along with a check engine light. It should be diagnosed to restore proper boost regulation and protect the engine.
What are the most common causes of P0046?
The most common causes of P0046 are: Sticking or worn boost-control solenoid/actuator, Carbon-fouled or binding variable-geometry turbo vanes, Vacuum leak or restricted vacuum line to the actuator, Wiring/connector resistance affecting the control signal, Boost pressure sensor inaccuracy, Worn turbocharger affecting boost response. The specific cause varies by vehicle.
How much does it cost to fix P0046?
Repair costs for P0046 range from $200 to $7,000, depending on the vehicle and root cause.
Which vehicles are affected by P0046?
Au7o has documented P0046 across 3 vehicle models from 3 manufacturers: GMC, RAM, Toyota.
Sources (6)
- ForumTurbo actuator is out on the 6.7 cummins - BobIsTheOilGuy Forums
- manufacturerTurbo Actuator HE351 Dodge/Ram 2500/3500 6.7L Cummins 2007.5-2012 - BD Diesel
- articleTurbo Failure on your 6.7L Cummins? Here's what you need to know - TamerX
- article2022-2025 Tundra, Sequoia & LX600 Turbocharger & Wastegate Failure Guide - Go-Parts
- Forum2022 Turbo waste gate actuator issue or Engine Sound Enhancement? - Tundra Forum
- article2022 Toyota Tundra Turbo Wastegate Issues Keep Piling Up - autoevolution
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.