Turbocharger Wastegate Solenoid B Range/Performance
The PCM detects that wastegate solenoid B is not operating within expected electrical parameters, indicating a circuit fault or solenoid malfunction. This solenoid controls boost pressure in turbocharged/supercharged engines, and its failure prevents proper turbo boost regulation.
What You Might Notice
- Malfunction Indicator Light (MIL) illuminated
- Instrument cluster warning message displayed
- Loss of engine power or reduced performance
- Excessive boost pressure or inability to build boost
- Poor acceleration response
Most Common Causes
- 1
Open ground circuit to solenoid
A break or loose connection in the ground circuit between the wastegate solenoid B and the PCM prevents proper electrical operation of the solenoid.
- 2
Open power supply circuit to solenoid
A broken or disconnected power supply wire or connector pin between the PCM and wastegate solenoid B prevents voltage from reaching the solenoid.
- 3
Short to ground in solenoid circuit
An unintended ground connection in the power supply wiring causes excessive current draw and solenoid failure.
- 4
Wastegate solenoid B internal failure
The solenoid coil is open, burned out, or mechanically stuck, preventing normal electromagnetic operation regardless of circuit voltage.
How to Diagnose It
- 1
Check Open ground circuit to solenoid — A break or loose connection in the ground circuit between the wastegate solenoid B and the PCM prevents proper electrical operation of the solenoid.
- 2
Check Open power supply circuit to solenoid — A broken or disconnected power supply wire or connector pin between the PCM and wastegate solenoid B prevents voltage from reaching the solenoid.
- 3
Check Short to ground in solenoid circuit — An unintended ground connection in the power supply wiring causes excessive current draw and solenoid failure.
- 4
Check Wastegate solenoid B internal failure — The solenoid coil is open, burned out, or mechanically stuck, preventing normal electromagnetic operation regardless of circuit voltage.
How to Fix It
- 1
Inspect and repair solenoid wiring
Visually inspect the wiring harness and connectors between the PCM and wastegate solenoid B for corrosion, damage, or loose connections. Repair or resolder any damaged wires and ensure all connectors are fully seated.
- 2
Test solenoid electrical resistance
Use an ohmmeter to measure the solenoid coil resistance and compare to manufacturer specifications. Replace the solenoid if resistance is out of range or infinite (open circuit).
- 3
Test circuit voltage and continuity
With the engine running and key on, use a multimeter to verify 12V is present at the solenoid connector and that ground continuity exists. Repair any broken connections or replace damaged wiring as needed.
- 4
Replace wastegate solenoid B
If solenoid testing shows internal failure, or if wiring repairs do not resolve the code, replace the wastegate solenoid B assembly with an OEM or quality aftermarket equivalent.
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