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P2814 — Pressure Control Solenoid G Control Circuit Low

Manufacturer-specificPowertrain (engine & transmission)

P2814 indicates that the Powertrain Control Module (PCM) has detected a low voltage condition in the control circuit for the Pressure Control Solenoid G, which regulates boost pressure in the turbocharger system.

Symptoms

What causes it — most likely first

1. Faulty Pressure Control Solenoid G

The solenoid may have failed internally, causing excessive resistance and a low voltage reading.

2. Wiring harness damage or poor connections

Corroded, broken, or loose wires or connectors in the solenoid’s control circuit can create a voltage drop.

3. Blown or weak fuse/relay for the solenoid circuit

A partially failed fuse or relay may allow only a reduced voltage to reach the solenoid.

4. Ground circuit issue

A high‑resistance ground path for the solenoid can cause the PCM to see a low voltage condition.

5. PCM control circuit failure (rare)

Only after ruling out the solenoid, wiring, fuses, and grounds should the PCM output driver be considered suspect.

How it's diagnosed

  1. Scan the vehicle to confirm P2814 and check for any related boost or turbocharger codes.
  2. Inspect the wiring harness and connectors for damage, corrosion, or looseness; repair or replace as needed.
  3. Measure the voltage at the solenoid’s control terminal while the engine is running and the PCM commands the solenoid; compare to specifications.
  4. Test the solenoid resistance with an ohmmeter; replace the solenoid if it is out of spec.
  5. Verify the associated fuse and relay are intact and supplying proper voltage; replace if defective.

Code facts & related codes

SystemPowertrain (engine & transmission)
StandardizationManufacturer-specific (P1/B1/C1/U1)
Related codesP2810 — Pressure Control Solenoid G ElectricalP2811 — Pressure Control Solenoid G IntermitteP2812 — Pressure Control Solenoid G Control CiP2813 — Pressure Control Solenoid G Control CiP2815 — Pressure Control Solenoid G Control CiP2816 — Pressure Control Solenoid H

Frequently asked

Can the PCM be the cause of a P2814 code?

It is possible but uncommon. The PCM is usually the controller, not the source of the low voltage. Only after confirming the solenoid, wiring, fuses, and grounds are functional should the PCM be examined.

Do I need to replace the entire turbocharger because of P2814?

No. The code specifically refers to the control circuit for Solenoid G, not the turbocharger itself. Replacing the solenoid or fixing the circuit usually resolves the issue.

Will clearing the code without fixing anything make the problem go away?

Clearing the code may turn off the Check Engine Light temporarily, but if the underlying low‑voltage condition remains, the code will return and the vehicle may continue to exhibit reduced performance.

Why do some sources recommend replacing the PCM for this code?

Many generic troubleshooting guides list the PCM as a last‑ditch fix, but in real‑world experience this is rarely the correct solution for P2814. Focus on the solenoid, wiring, and related fuses first.