C0623 code meaning
Variable Effort Steering Lock/Safety Actuator Control Circuit Performance
What C0623 means
C0623 covers a lock or safety actuator whose circuit is sound but whose action does not match the command: it does not release when energised, does not engage in time, or its current is implausible. JTEKT's lock coil first gets full duty for about one second to pull the arm free, then 60 % below 13 V or 40 % above 14 V to hold it, which keeps the coil at or below 100 °C instead of near 200 °C. GM's active steering patent switches to the mechanical lock if electrical locking has not taken effect within about 42 ms. A worn lock pin, a sticky arm, a weak spring or a hot coil can each upset such timing. No maker publishes C0623; the variable steering function is switched off until the code clears.
C0623 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modePossible
- Repair difficultyHard
- Typical labor0.5 to 4 hours
- Clears after repairWhen cleared with a scanner
Symptoms of C0623
- Steering warning and variable function off
- Clicking or knocking from the steering column at start or stop
- Steering wheel slightly off-centre after the system locks
Common causes of C0623
- Most likelySticking lock arm or pin, worn lock teeth
- PossibleSolenoid weakened by heat, pull-in force too low
- PossibleLow supply voltage during release
- Less likelyWeak or broken return spring, lock engages late
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Ves lock actuator
What each part of C0623 means
| C | Chassis system: brakes, ABS, steering and suspension. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 23 | The exact fault in that area. |
What to do next
- Note C0623 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about C0623
What does C0623 mean?
C0623 means "Variable Effort Steering Lock/Safety Actuator Control Circuit Performance". C0623 covers a lock or safety actuator whose circuit is sound but whose action does not match the command: it does not release when energised, does not engage in time, or its current is implausible. It is a generic code, so it means the same on every make.
Is it safe to drive with C0623?
Drive gently and only to a workshop. With C0623 the car can go into limp mode (reduced power) to protect itself.
Will C0623 fail an emissions test?
C0623 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is C0623 to fix?
Difficulty: hard. A typical repair takes 0.5 to 4 hours of work. This is a job for a workshop.
Will C0623 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.