AutoCodes – Ford – U1243 Ford

U1243 Ford Code - Invalid Or Missing Data For Exterior Environment

Quick Answer

The Anti-lock Brake System (ABS) Module is on the Serial Communications Protocol (SCP) Communication network. Common causes include Faulty Network, Faulty Powertrain Control Module (PCM). Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: U1243 Ford indicates Invalid Or Missing Data For Exterior Environment.
Common causes: Common causes include Faulty Network, Faulty Powertrain Control Module (PCM).
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 871

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 05, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U1243 Ford Description

The Anti-lock Brake System (ABS) Module is on the Serial Communications Protocol (SCP) Communication network. The ABS module controls the brake pressure to the 4 wheels to keep the vehicle under Control while braking. The ABS module also controls the stability assist and traction Control systems (if equipped). If one of the BUS wires becomes shorted to ground or battery voltage, or if some but not all termination resistors are lost, communications can continue at a degraded level.

OBDII Code U1243 Ford - Invalid Or Missing Data For Exterior Environment - AutoCodes.com — U1243 Ford Code - Invalid Or Missing Data For Exterior Environment

What does this mean?

What are the Possible Causes of the DTC U1243 Ford?

Faulty Network
Faulty Powertrain Control Module (PCM)

How to Fix the DTC U1243 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 U1243 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.

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Need Help with the Code?

Get the U1243 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 U1243 Ford Code

1. What are the common symptoms of OBDII code U1243 in a Ford vehicle?

- Common symptoms include malfunctioning exterior temperature display, inaccurate climate control, and issues with the automatic headlights.

2. What could cause the OBDII code U1243 "Invalid Or Missing Data For Exterior Environment" in a Ford?

- The code U1243 can be triggered by faulty exterior temperature sensors, wiring issues, or a malfunctioning control module.

3. How can I diagnose the cause of the U1243 code in my Ford?

- To diagnose the issue, you can start by checking the wiring connections to the exterior temperature sensors, testing the sensors themselves, and inspecting the control module for any signs of damage.

4. Can extreme weather conditions trigger the U1243 code in a Ford vehicle?

- Yes, extreme weather conditions like extreme cold or heat can sometimes cause the exterior temperature sensors to malfunction and trigger the U1243 code.

5. What is the typical repair process for resolving the U1243 code in a Ford?

- The typical repair process involves identifying the faulty component (sensor, wiring, or module), replacing the defective part, clearing the code, and performing a test drive to ensure the issue is resolved.

6. Is it safe to continue driving my Ford with the U1243 code present?

- While it may be safe to drive with the U1243 code present, it is recommended to address the issue promptly to prevent potential issues with climate control or automatic lighting systems.

7. Can a DIY enthusiast fix the U1243 code issue in a Ford, or is it best left to professionals?

- Depending on your skill level and access to tools, a DIY enthusiast may be able to troubleshoot and repair the U1243 code. However, if you are unsure, it is best to seek professional help.

8. How much does it typically cost to repair the U1243 code in a Ford at a dealership or repair shop?

- The cost of repairing the U1243 code can vary depending on the specific issue, but it typically ranges from $100 to $300 for parts and labor at a dealership or repair shop.

9. Are there any preventative measures I can take to avoid the U1243 code in my Ford in the future?

- Keeping your vehicle well-maintained, checking the exterior temperature sensors periodically, and addressing any wiring issues promptly can help prevent the recurrence of the U1243 code.

10. Will resetting the OBDII code on my Ford make the U1243 code disappear permanently?

- Resetting the code may clear it temporarily, but if the underlying issue causing the U1243 code is not fixed, it is likely to reappear. It is important to diagnose and address the root cause of the code.