AutoCodes – Ford – P1434 Ford

P1434 Ford Code - A/C Refrigerant Temperature Circuit High

Quick Answer

The Engine Control Module (ECM) monitors the A/C Refrigerant Temperature. Common causes include Faulty Evaporator Temperature Sensor, Evaporator Temperature Sensor harness is open or shorted, Evaporator Temperature Sensor circuit poor electrical connection. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means
P1434 Ford indicates A/C Refrigerant Temperature Circuit High.
Common causes
Common causes include Faulty Evaporator Temperature Sensor, Evaporator Temperature Sensor harness is open or shorted, Evaporator Temperature Sensor circuit poor electrical connection.
Severity
Low - monitor the vehicle and repair when practical.
Can I drive?
The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
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Code Popularity 6,338
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Aug 13, 2022
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Code P1434 Ford Description

The Engine Control Module (ECM) monitors the A/C Refrigerant Temperature. The Diagnostic Trouble Code (DTC) will set when the ECM detects the evaporator control circuit had a high voltage condition.
OBDII Code P1434 Ford - A/C Refrigerant Temperature Circuit High - AutoCodes.com
P1434 Ford Code - A/C Refrigerant Temperature Circuit High

What are the Possible Causes of the DTC P1434 Ford?

  • Faulty Evaporator Temperature Sensor
  • Evaporator Temperature Sensor harness is open or shorted
  • Evaporator Temperature Sensor circuit poor electrical connection

How to Fix the DTC P1434 Ford?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1434 Ford code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P1434 Ford code?

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Need Help with the Code?

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P1434 Ford Code

No Frequently Asked Questions about P1434 Ford Code found.

Discuss the causes and fixes for P1434 Ford OBDII Code

  • My Ford Falcon keeps on showing warning light for Low oil, but the oil is full? Whats the reason for this?

  • Could be the oil pressure switch. Unfortunately I don't have the service manual for your vehicle, to give you more information.

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