P0034

Turbocharger/Supercharger Bypass Valve A Control Circuit Low

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Reduced engine power
Rough idling
Deterioration in acceleration dynamics
Increased fuel consumption
Check engine light comes on

Causes

Open circuit in valve control wiring harness
Short circuit to ground in control circuit
Malfunction of the solenoid valve (solenoid)
Poor contact in connectors
Engine control unit malfunction

How to Fix

Visually inspect the wiring harness for damage
Checking the resistance and voltage at the valve
Testing valve operation by applying voltage
Checking connectors for corrosion and oxidation
Replacing a faulty bypass valve if necessary

Related codes

P0035 P0036 P0037 P0234 P0236