Turbocharger/Supercharger Wastegate Solenoid A High

What it means

The engine computer has detected unexpectedly high voltage in the circuit of wastegate solenoid A. This usually comes from a control wire shorted to a voltage source, or on some circuit designs an open solenoid or wire, so the computer cannot operate it properly.

Related codes: P0243P0245P0234P0244

Symptoms4

• Check engine light on.
• Loss of power or limp mode.
• Irregular boost, either low or excessive.
• The fault may come and go with heat or vibration.

Possible causes5

• Control wire shorted to a voltage source in the harness.
• Open solenoid coil or control wire.
• Loose or corroded connector causing a poor connection.
• Solenoid damaged by heat.
• Driver circuit fault inside the engine computer (rare).

How to diagnose5

1. Measure the solenoid coil resistance; an infinite reading means an open coil.
2. Unplug the solenoid and measure voltage on the control wire; voltage present with the computer disconnected means a short to a voltage source.
3. Check continuity of the control wire between the solenoid and the computer.
4. Inspect the connector for loose or corroded terminals.
5. Command the solenoid with a scan tool after the repair and watch the boost response.

How to fix5

1. Repair the short in the harness and re-insulate the wires.
2. Repair the open control wire.
3. Clean or replace the connector.
4. Replace the solenoid if its coil is open.
5. Clear the codes, then test under load and confirm the code does not return.

Repair cost

In Saudi riyals; the highlighted part is the expected range for this fault.

The cost is low for a wiring or connector repair and reaches the upper end when the control solenoid is replaced.

Prices are rough estimates for common cars at independent workshops and vary with the car and the source of the part.
Prices last updated: September 2026

Frequently asked questions