Carrier Air-conditioner 57-01 Error Code — Meaning & Causes (2026)
Pressure transducer P1 open fault — the P1 pressure transducer signal is outside the range the transducer can measure, usually because it is not receiving its 5V supply or its signal wire is open. Below: what triggers it and what to check — this code carries no single repair to price. Reviewed July 2026.
What 57-01 means
Pressure transducer P1 open fault — the P1 pressure transducer signal is outside the range the transducer can measure, usually because it is not receiving its 5V supply or its signal wire is open.
Likely causes, most common first
- Failed pressure transducer
- Open or disconnected transducer power, ground or signal wire
Base: 1 published national repair-cost guide (retrieved 2026-07) · full source registry on the methodology page · Code meaning & causes · Reviewed July 2026
No single repair to price for this code
57-01 doesn't point at one failed component, so we don't attach a price module — forcing a repair mapping here would be dishonest. If the code keeps returning, the underlying symptom (not the code) is what gets priced: browse the central air conditioning repair costs for the problem you're actually seeing.
Codes are universal — your location changes the repair price, never the code's meaning. See the methodology for the exact localization formula and sources.
Reviewed by a Red Seal–certified appliance technician who also holds a Technical Safety BC gas ticket (Gas-C) and an ODS/halocarbon refrigerant ticket (CFC/HCFC/HFC).