Code result
C0540
Hill Hold Control Performance
Moderate severity
What it means
The hill hold control function does not behave as expected during a hill start, often because brake pressure is not held long enough.
Is it safe to drive?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
Hydraulic block internal leak
highOne of the most commonly reported causes for this code — check this first.
Pressure sensor drift
mediumA plausible cause — test and verify before replacing parts.
Related help
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