P0247
Turbocharger Wastegate Solenoid A High
Powertrain Emission Controls Turbocharger boost control 🟡 Moderate — Fix within a week
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What This Actually Means
In plain language — no jargon

The turbocharger's wastegate solenoid is stuck in the open position or has an electrical short, preventing proper boost pressure control. Think of it like a relief valve that's jammed open—exhaust gases bypass the turbine instead of spinning it up.

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Symptoms You May Notice
3 known symptoms for this code
Reduced engine power and poor acceleration
Check Engine Light illuminated
Excessive turbo boost or inability to build boost pressure
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Embedded Systems Insight
What the ECU/ECM is actually computing

The ECM monitors the solenoid control circuit voltage when commanding the wastegate open/closed. A 'High' code means the voltage is above the expected threshold, indicating an open circuit, broken solenoid coil, or wiring short to power.

Voltage & Parameter Thresholds

Parameter Normal Range Fault Condition
Solenoid Control Voltage 0.5–4.5V (varies by command) >5V or no voltage response
Solenoid Coil Resistance 5–15 ohms (typical) Open circuit or >20 ohms
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Diagnostic & DIY Fix Guide
Check these in order — from cheapest to most complex
1
Wiring harness and connectors
Inspect the solenoid connector and wiring for corrosion, loose pins, or damage; clean or reseat connections.
2
Wastegate solenoid
Test solenoid resistance with a multimeter; replace if open circuit or resistance out of spec.
3
Engine control module software update
Check manufacturer for ECM reprogramming or updated calibration to correct sensing logic.