P0243Fuel & Air

Turbo/Super Wastegate Solenoid A Circuit/Open

P0243 means the PCM detected an open or circuit fault in wastegate solenoid A. Without solenoid control the PCM cannot regulate the wastegate, so boost is not controlled correctly.

🚗 Limited. The wastegate solenoid circuit is open, so boost control is affected and power may be reduced.

MEDIUM

severity

🎯 Top Causes, Ranked by Likelihood

#1Faulty wastegate solenoid A$80-$300

35%

An open solenoid coil breaks the control circuit.

#2Damaged wiring or connector$100-$300

30%

Open or chafed wiring interrupts the signal.

#3Poor connector contact$20-$100

20%

A corroded connector opens the circuit.

#4PCM output driver fault$500-$1200

15%

A failed driver cannot command the solenoid.

🩺 Common Symptoms

Reduced power or limp mode
Check engine light
Poor acceleration
Over or under boost
Boost surging

💰 Repair Cost: DIY vs Shop

DIY Cost

$20-$300

Shop Cost

$100-$1200

📋 Free OBD2 Code Cheat Sheet

The 50 most common codes with likely cause and DIY fix cost. Sent once, no spam.

🔧 How to Diagnose P0243

1Inspect the wastegate solenoid wiring and connector

2Measure solenoid resistance against spec

3Check for power and ground at the solenoid

4Command the solenoid with a scan tool and watch response

❓ Frequently Asked Questions

Can I drive with P0243?

For short trips, yes, but boost control is impaired and power may be reduced. Repair it soon.

What does P0243 mean?

An open or fault in the wastegate solenoid A circuit that prevents the PCM from controlling boost properly.

How much to fix P0243?

A replacement solenoid is $80-$300, and wiring repairs run $100-$300.

🔗 Related Codes

P0045P0234P0245P0246P0299