garajizOBD-II code · manufacturer-specific
P1543
A/C System Performance
- System
- P1 — Powertrain (manufacturer-specific)
- Severity
- Low (1/5)
- Can I keep driving?
- Usually safe to drive
What does P1543 mean?
P1543 is defined as “A/C System Performance”.
You can usually keep driving, but have it checked soon so a small fault doesn’t become a bigger one.
Manufacturer-specific meanings
The same code can mean something different on some makes.
- Buick, Cadillac, Chevrolet, Chrysler, GM, GMC, Oldsmobile, Saturn: A/C System Performance
- BMW: Pedal Position Sensor
- Volkswagen: Throttle Actuation Potentiometer Signal Too Low
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This page is general information; an exact diagnosis needs measurements and a technician’s check.