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, 2022-2025 Toyota Tundra, and 2007-2024 RAM 2500 (2500 6.7L Cummins), 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
This is a powertrain code, so a basic OBD-II reader can read it. These read P0046.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple code reader for engine (P) codes on many compatible OBD-II vehicles. It does not support every vehicle or hybrid/EV application, and it does NOT read body, chassis or network codes; confirm exact-vehicle compatibility before buying.
- Read & clear engine (P) codes
- View freeze frame data
- I/M readiness status
- No batteries or app needed
BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth scanner with a companion app that reads beyond the engine module — ABS, SRS and transmission — plus manufacturer-specific codes on many vehicles.
- Enhanced diagnostics (ABS, SRS, transmission)
- Repair Reports with verified fixes
- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X V3.0 Elite OBD-II Scanner
by LAUNCH
Handheld scanner covering the 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 tablet with all-system coverage and bi-directional control, so you can command a module rather than only read it.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
What you can do yourself, and what needs a shop
Reading the code, clearing it, and watching whether it returns is a driveway job with the right scanner. These steps are not:
- Module programming or software updates — needs the manufacturer software or a J2534 pass-through with a paid subscription.
- Replacing a control module — most are VIN-programmed and immobilizer-registered, so a new one does nothing until it is coded to your car.
- Airbag/SRS component work — a stored fault can deploy a live device.
If the vehicle is still under warranty, check for an open recall or technical service bulletin before buying anything — the repair may already be covered.
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 (7)
- RecallNHTSA Campaign 26V325 - Expanded Roof-Rail Airbag Inflator Recall
- 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
- 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
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.