A/C Refrigerant Temperature Circuit High
Findings, check these first
- Open refrigerant temperature circuit
- Unplugged sensor connector
- Failed sensor reading open
- Broken harness wire
- Corroded terminals
Standard procedure
- Reseat the sensor connector
- Test circuit continuity
- Measure sensor resistance
- Repair wiring faults
- Replace the sensor if the circuit is intact
Code lookup
Type a code above, or start from a symptom or a common code.
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Sources and review
Review: checked against the recorded source material.
- OBDII.pro: P1434 Ford definition
live reference page (obdii.pro)
Supports: Ford-family meaning for P1434: A/C Refrigerant Temperature Circuit High
Fetched directly. obdii.pro is a publisher independent of the engine-codes family.
- P1434 FORD Code: Meaning, Causes, and Symptoms | OBD2 Codes
live reference page (obd2-codes.co)
Supports: Ford meaning for P1434: A/C Refrigerant Temperature Circuit High
Fetched directly. obd2-codes.co phrasing matches the engine-codes family, so it counts as one publisher.
Last updated 2026-09-06.
Report a correction for P1434. Include your vehicle, the issue and a source if you have one.