P0046Fuel & Air

Turbo/Super Boost Control Solenoid Circuit Range/Performance

P0046 means the PCM detected the turbo or supercharger boost control solenoid signal is out of the expected range or responding too slowly. It indicates a performance problem rather than a hard open.

🚗 Limited. Boost regulation is out of range, so the engine may run in reduced power until repaired.

MEDIUM

severity

🎯 Top Causes, Ranked by Likelihood

#1Sticking or worn boost control solenoid$80-$300

35%

A slow or sticky solenoid gives an out-of-range response.

#2Vacuum or boost hose leak$50-$200

25%

A leaking control hose changes actual boost response.

#3Wiring or connector fault$100-$300

20%

High resistance skews the solenoid signal.

#4Faulty wastegate or actuator$200-$900

20%

A stuck actuator prevents the commanded boost.

🩺 Common Symptoms

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

💰 Repair Cost: DIY vs Shop

DIY Cost

$50-$300

Shop Cost

$100-$900

📋 Free OBD2 Code Cheat Sheet

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

🔧 How to Diagnose P0046

1Inspect boost control hoses for leaks

2Test the solenoid response with a scan tool

3Measure solenoid resistance against spec

4Verify wastegate or actuator movement

❓ Frequently Asked Questions

Can I drive with P0046?

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

What is the difference from P0045?

P0045 is an open circuit, while P0046 is a range or performance issue where the solenoid responds but not correctly.

How much to fix P0046?

A solenoid or hose repair runs $50-$300, and a wastegate or actuator can reach $900.

🔗 Related Codes

P0045P0234P0243P0245P0299