What does P1433 mean on a Ford?

P1433. A/C Refrigerant Temperature Circuit Low. Applies to F-150, Explorer, Taurus with refrigerant temp sensing.

What causes P1433 on a Ford?

Shorted refrigerant temperature sensor Signal wire shorted to ground Failed sensor stuck low Connector contamination PCM reference fault

How do I fix P1433 on a Ford?

Inspect sensor wiring for shorts Disconnect and watch for a reading change Test sensor resistance Clean the connector Replace the sensor if out of range

Code

P1433

A/C Refrigerant Temperature Circuit Low

Category: Powertrain - Computer and Auxiliary Controls
Severity: Check Engine Light
Applies to: F-150, Explorer, Taurus with refrigerant temp sensing
Related: No single generic twin. See OBD Codes List

Findings, check these first

Shorted refrigerant temperature sensor
Signal wire shorted to ground
Failed sensor stuck low
Connector contamination
PCM reference fault

Standard procedure

Inspect sensor wiring for shorts
Disconnect and watch for a reading change
Test sensor resistance
Clean the connector
Replace the sensor if out of range

Code lookup

Type a code above, or start from a symptom or a common code.

Press / to jump to the box. Ford-enhanced powertrain, body, chassis and network codes. Generic P0xxx codes live on OBD Codes List.

Sources and review

Review: checked against the recorded source material.

OBDII.pro: P1433 Ford definition
live reference page (obdii.pro)
Supports: Ford-family meaning for P1433: A/C Refrigerant Temperature Circuit Low
Fetched directly. obdii.pro is a publisher independent of the engine-codes family.
P1433 FORD Code: Meaning, Causes, and Symptoms | OBD2 Codes
live reference page (obd2-codes.co)
Supports: Ford meaning for P1433: A/C Refrigerant Temperature Circuit Low
Fetched directly. obd2-codes.co phrasing matches the engine-codes family, so it counts as one publisher.

Last updated 2026-09-06.

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