P0243: Turbocharger/Supercharger Wastegate Solenoid "A" Malfunction
16 vehicles · 4 makes · $100-$12,000 repair
Most Reported On
P0243 is an OBD-II diagnostic trouble code meaning “Turbocharger/Supercharger Wastegate Solenoid "A" Malfunction.” This code indicates a general fault with turbocharger/supercharger wastegate solenoid "A," which the engine control module uses to manage boost pressure. The computer has detected the solenoid or its circuit is not responding correctly (open, shorted, or out of expected operating range). Because it governs boost, a fault can lead to overboost or underboost, reduced power, or a limp mode. This code is most commonly reported on 2012-2018 BMW 3 Series (335d, 335i, 340i, M340i), 2015-2018 BMW M3, and 2017-2024 BMW M240i, plus 13 other vehicles, with repair costs ranging from $100 to $12,000.
Common Causes
Typical Repair Cost
Based on 16 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 P0243.
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.
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Vehicles Affected (16)
3.0T Supercharger Bearing and Intercooler Pump Failure
4.0T Turbo Coolant System Degradation
3.0T Supercharger Intercooler Pump Failure
Supercharger Clutch and Isolator Failure (S7 3.0T)
Wastegate/Boost Solenoid Issues
S55 Plastic Charge Pipe Cracking
Plastic Charge Pipe Failure Under Boost
Turbo Wastegate Rattle at Idle
S58 Plastic Charge Pipe Cracking Under Boost
S63 Twin Turbo Wastegate Rattle - E70/F85 X5 M
N63 Turbo Wastegate Rattle (xDrive50i)
Turbo Charge Pipe Failure - F22/F23 228i/230i/M240i
Turbocharger Wastegate Rattle (N55, N20, B58 Engines)
FAQ
What does P0243 mean?
P0243 stands for "Turbocharger/Supercharger Wastegate Solenoid "A" Malfunction." This code indicates a general fault with turbocharger/supercharger wastegate solenoid "A," which the engine control module uses to manage boost pressure. The computer has detected the solenoid or its circuit is not responding correctly (open, shorted, or out of expected operating range). Because it governs boost, a fault can lead to overboost or underboost, reduced power, or a limp mode.
What are the most common causes of P0243?
The most common causes of P0243 are: Failed or sticking wastegate solenoid, Open or shorted wiring in the solenoid circuit, Corroded or damaged electrical connector, Mechanical wastegate sticking or binding, Vacuum/boost hose leaks or blockage, Faulty ECM/PCM solenoid driver (rare). The specific cause varies by vehicle.
How much does it cost to fix P0243?
Repair costs for P0243 range from $100 to $12,000, depending on the vehicle and root cause.
Which vehicles are affected by P0243?
Au7o has documented P0243 across 16 vehicle models from 4 manufacturers: Audi, BMW, Ford, Toyota.
Sources (12)
- NHTSANHTSA Manufacturer Communications Data Corpus
- ManualAudi Product Information - New SQ5 Replaces the Mechanical Supercharger with a Twin-Scroll Turbocharger
- TSBAudi TSB 2036167/3 - 2013-2014 S8 Turbocharger Coolant-Pipe Seepage
- TSBAudi TSB 2065040/4 - Coolant Pump Leak, 4.0 TFSI
- ManualAudi 2013 A5/S5 Quick Reference Specification Book
- TSBToyota TSB TSB009123 — 2023 Crown, MIL ON with DTC P024313 (Turbocharger/Wastegate Solenoid A Circuit Open)
- TSB2023 Toyota Crown Technical Service Bulletin index (NHTSA-sourced)
- ForumWastegate actuator/solenoid - 2.0L EcoBoost - Ford Edge Forum
- Forum2012 Edge Ecoboost Turbo Failure - 2.0L EcoBoost - Ford Edge Forum
- articleP1464 on 2019-2021 Ford Edge: Why an A/C Code Points to a Turbo Problem
- articleP0299 on 2015-2024 Ford Edge: Turbo Underboost Causes and Fixes
- NHTSANHTSA 2012 Audi A7 Recall Inventory
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.