P0243 on Toyota
Turbocharger/Supercharger Wastegate Solenoid "A" Malfunction
P0243 on Toyota vehicles indicates turbocharger/supercharger wastegate solenoid "a" malfunction. Au7o has documented this code across 1 Toyota model — most commonly on Crown. 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.
Common Causes of P0243
- •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)
P0243 on Toyota by Model
Toyota Crown(1 issue)
- Turbocharger/Wastegate Solenoid "A" Circuit Open (P024313) Illuminates Check Engine Light on Hybrid MAX 2.4T2023
Some 2023 Toyota Crown vehicles built with the Hybrid MAX 2.4-liter turbocharged T24A-FTS engine (Platinum grade) illuminate the MIL and store DTC P024313, Turbocharger/Supercharger Wastegate Solenoid 'A' Circuit Open. Toyota's investigation found the Engine Control Module's detection logic for the vacuum-regulating/wastegate solenoid circuit was setting the code without an actual open circuit or failed solenoid being present, so vehicles were being presented for repair with a check engine light and no hardware fault. The naturally aspirated 2.5-liter A25A-FXS hybrid Crown (XLE/Limited) has no turbocharger and is not subject to this code.
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View P0243 across all makes →Frequently Asked Questions
What does P0243 mean on Toyota?▼
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. On Toyota specifically, this code is documented across 1 model.
What causes P0243 on Toyota vehicles?▼
Common causes on Toyota: 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. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0243 on a Toyota?▼
Repair costs vary widely depending on the root cause and specific Toyota model.
Which Toyota models have P0243 documented?▼
Au7o has documented P0243 on 1 Toyota model: Crown.