Turbocharger/Supercharger Wastegate Solenoid A Low

What it means

The engine computer has detected unexpectedly low voltage in the circuit of wastegate solenoid A. This usually points to a control wire shorted to ground or lost solenoid power, so the computer loses control of boost pressure and limits power.

Related codes: P0243P0246P0299P0244

Symptoms4

• Check engine light on.
• Loss of power or limp mode.
• Unstable or low boost.
• Slow acceleration.

Possible causes5

• Control wire shorted to ground, often from chafing or melted insulation near the hot turbo.
• Loss of solenoid power from a blown fuse or an open wire.
• Internal short in the solenoid coil.
• Corroded or wet connector.
• Driver circuit fault inside the engine computer (rare).

How to diagnose5

1. Check the solenoid supply fuse and confirm voltage reaches the connector.
2. Measure the solenoid coil resistance; very low resistance means an internal short.
3. Disconnect the solenoid and computer and check the control wire's insulation from ground.
4. Inspect the harness near the turbo and exhaust for melted or chafed insulation.
5. Command the solenoid with a scan tool after the repair and confirm it responds.

How to fix5

1. Repair the wire touching ground, re-insulate it and secure it away from heat.
2. Replace the blown fuse after removing the cause of the short, and repair an open supply wire.
3. Clean and dry the connector or replace it.
4. Replace the solenoid if its coil is shorted.
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 wire, fuse 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