Engine-Codes - Generic - U1243

U1243 - Invalid Or Missing Data For Exterior Environment

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What is this?
Table of contents

U1243 Possible Causes

  • Faulty Network
  • Faulty Powertrain Control Module (PCM)

How is the U1243 code repair?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

What is the cost to diagnose the U1243 code

Labor: 1.0

The cost to diagnose the U1243 code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.
How much do you know about cars?

Take the AutoCodes.com automotive tests and turbo-charge your car repair knowledge

Play Now

Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

U1243 Meaning

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.

More Information

Need more information on how to fix the U1243 code?
Get Access to Factory Service Manuals

Information for specific makes

Need more help?

Get the U1243 code diagnosed by a professional: Find a repair shop in your area