A/C System Performance
Table of contents
P1543 BUICK Possible Causes
- Faulty A/C System
- A/C System harness is open or shorted
- A/C System circuit poor electrical connection
How do I fix code P1543 BUICK?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Cost of diagnosing the P1543 BUICK code
The cost of diagnosing the P1543 BUICK code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P1543 BUICK Description
With the engine running, the Powertrain Control module (PCM) detects that the A/C refrigerant charge was below a specified value (determined by the Evaporator Temperature and Refrigerant Pressure inputs)