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C0622 — Variable Effort Steering Locksafety Actuator Control Circuit High

Generic OBD-II · all makesChassis

Code C0622 indicates a high voltage condition in the Variable Effort Steering (VES) lock safety actuator control circuit. The power steering system detects an abnormal voltage level and disables the steering lock function to protect the system.

Symptoms

What causes it — most likely first

1. Faulty VES lock safety actuator

The actuator itself can develop internal short circuits or open circuits that cause a high voltage reading.

2. Damaged wiring or connectors in the VES control circuit

Corroded, frayed, or broken wires and poor connector contacts can create voltage spikes that trigger the code.

3. Voltage regulator or power supply issue

A malfunctioning regulator that supplies the steering lock circuit may produce excessive voltage.

4. Ground or reference voltage problem

Improper grounding or a bad chassis ground can cause the control module to interpret normal voltage as high.

5. Control module (steering control unit) malfunction

Rarely, the steering control module can misinterpret sensor signals and report a high voltage condition.

How it's diagnosed

  1. Visually inspect VES actuator wiring and connectors for damage, corrosion, or loose pins.
  2. Measure voltage at the actuator control terminal while the ignition is ON; compare to service specifications.
  3. Test continuity and resistance of the actuator control circuit wiring to locate shorts or opens.
  4. Check the voltage regulator output voltage for proper range.
  5. If all hardware tests are normal, scan for additional related codes and consider functional testing of the steering control module.

Code facts & related codes

SystemChassis
StandardizationSAE generic — identical on every make
Related codesC0620 — Variable Effort Steering Locksafety AcC0621 — Variable Effort Steering Locksafety AcC0623 — Variable Effort Steering Locksafety AcC0624 — Variable Effort Steering Sensor CircuiC0625 — Variable Effort Steering Sensor CircuiC0626 — Variable Effort Steering Sensor Circui

Frequently asked

Do I need to replace the PCM/ECM to fix C0622?

No. The PCM is rarely the cause of this code. Most cases are resolved by repairing the actuator, wiring, or voltage regulator.

Will the steering lock work again after the code is cleared?

It will only re‑engage if the underlying fault is repaired. Clearing the code without fixing the problem will cause it to return.

Can a blown fuse cause C0622?

A fuse that is open will usually cause a low‑voltage condition, not a high‑voltage one, so it is unlikely to trigger C0622.

Is the steering feel affected while the code is present?

Yes. The steering lock actuator may stay disengaged, which can make the steering feel heavier or cause intermittent loss of power‑steering assist.