AutoCodes – Ford – B1253 Ford

B1253 Ford Code - Air Temperature Internal Sensor Circuit Short To Ground

Quick Answer

The Electronic Automatic Temperature Control (EATC) Module monitors the Air Temperature Internal Sensor. Common causes include Faulty Air Temperature Internal Sensor, Air Temperature Internal Sensor harness is open or shorted, Air Temperature Internal Sensor circuit poor electrical connection. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

What it means
B1253 Ford indicates Air Temperature Internal Sensor Circuit Short To Ground.
Common causes
Common causes include Faulty Air Temperature Internal Sensor, Air Temperature Internal Sensor harness is open or shorted, Air Temperature Internal Sensor circuit poor electrical connection.
Severity
Moderate - service should be scheduled soon.
Can I drive?
The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
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Code Popularity 1,889
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Nov 29, 2024
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Code B1253 Ford Description

The Electronic Automatic Temperature Control (EATC) Module monitors the Air Temperature Internal Sensor. The EATC sets the OBDII code when the Air Temperature Internal Sensor is not to factory specifications.
OBDII Code B1253 Ford - Air Temperature Internal Sensor Circuit Short To Ground - AutoCodes.com
B1253 Ford Code - Air Temperature Internal Sensor Circuit Short To Ground

What are the Possible Causes of the DTC B1253 Ford?

  • Faulty Air Temperature Internal Sensor
  • Air Temperature Internal Sensor harness is open or shorted
  • Air Temperature Internal Sensor circuit poor electrical connection
  • Faulty Electronic Automatic Temperature Control (EATC) Module

How to Fix the DTC B1253 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 B1253 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 B1253 Ford code?

Need more information on how to fix the B1253 Ford code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1253 Ford code diagnosed by a professional: Find a repair shop in your area

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 B1253 Ford Code

1. What are the common symptoms of OBDII code B1253 in a Ford related to the Air Temperature Internal Sensor Circuit Short To Ground?

The common symptoms include inaccurate temperature readings on the dashboard, issues with the HVAC system, and potential impact on the vehicle's fuel efficiency.

2. What are the possible causes of the Air Temperature Internal Sensor Circuit Short To Ground code (B1253) in a Ford?

The code B1253 can be triggered by a short circuit in the wiring, a faulty air temperature sensor, or a damaged connector in the internal sensor circuit.

3. How can I diagnose the Air Temperature Internal Sensor Circuit Short To Ground issue in my Ford vehicle?

Diagnosing this issue requires using an OBDII scanner to retrieve the specific trouble code (B1253), checking the wiring and connectors for any visible damage, and testing the air temperature sensor for proper functionality.

4. Can I drive my Ford with the B1253 code related to the Air Temperature Internal Sensor Circuit Short To Ground?

It is generally not recommended to drive the vehicle with unresolved OBDII codes, as the underlying issue could potentially affect the vehicle's performance and fuel efficiency.

5. How can I repair the Air Temperature Internal Sensor Circuit Short To Ground issue in my Ford?

Repairing the B1253 code may involve repairing or replacing damaged wiring or connectors, testing and replacing the faulty air temperature sensor, and clearing the trouble code with an OBDII scanner.

6. Is it possible to reset the B1253 code related to the Air Temperature Internal Sensor Circuit Short To Ground without fixing the issue?

Resetting the code without addressing the underlying issue may temporarily turn off the check engine light, but the problem will likely reoccur until the root cause is fixed.

7. How much does it cost to repair the B1253 code for the Air Temperature Internal Sensor Circuit Short To Ground in a Ford?

The cost of repair can vary depending on the specific issue causing the code, the labor rates of the repair shop, and the cost of any replacement parts that may be needed.

8. Can a DIY enthusiast fix the B1253 code related to the Air Temperature Internal Sensor Circuit Short To Ground in a Ford?

While some DIY enthusiasts may have the skills to diagnose and repair this issue, it is recommended to consult a professional mechanic, especially when dealing with electrical components.

9. Will the B1253 code related to the Air Temperature Internal Sensor Circuit Short To Ground cause any long-term damage to my Ford if left unresolved?

Leaving the issue unresolved could potentially lead to reduced fuel efficiency, inaccurate temperature readings, and other related problems, so it is advisable to address the issue promptly.

10. How long does it typically take to repair the B1253 code for the Air Temperature Internal Sensor Circuit Short To Ground in a Ford?

The repair time can vary based on the specific cause of the issue, the availability of replacement parts, and the experience of the mechanic, but in general, it may take a few hours to complete the repair.

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