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AutoCodes – Generic – U1241

U1241 Code - Lost Communications With Scan Tool

Quick Answer

The Passenger Presence System (PPS) monitors itself for faults and will set flash diagnostic trouble codes if a fault is detected. Common causes include No cause, Cycle Ignition Key and Clear Code. 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
U1241 indicates Lost Communications With Scan Tool.
Common causes
Common causes include No cause, Cycle Ignition Key and Clear Code.
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 5,763
How popular is this code, among other codes? Low
What is this?
Table of contents Created and updated by William Orellana on May 05, 2020
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Code U1241 Description

The Passenger Presence System (PPS) monitors itself for faults and will set flash diagnostic trouble codes if a fault is detected. The PPS communicates with the inflatable restraint Sensing and Diagnostic Module (SDM) via non class 2 communications. When the SDM receives input from the PPS that a PPS fault has occurred, the SDM will request the instrument panel cluster (IPC) to turn the AIR BAG indicator located on the IPC ON. To determine what Diagnostic Trouble Code (DTC) have been set by the PPS, the Tech 2 is used to command the SDM to request the PPS to flash the DTCs using the PASSENGER AIR BAG ON/OFF indicators. The Tech 2 sends a string of commands to the SDM that allows the SDM to communicate with the PPS module and initiate the flashing of the DTCs. When the Tech 2 has completed sending the commands, the PPS will begin flashing any current or history DTCs that the system has stored. When the SDM no longer receives commands from the Tech 2, the SDM mistakes this as a communication fault and sets DTC U1241. DTC U1241 will set when the Tech 2 is used to flash DTCs from the PPS or after the PPS has been rezeroed. DTC U1241 does not indicate a system malfunction and will not cause any warning indicators to illuminate. When DTC U1241 sets, cycle the ignition and use the scan tool to clear the code, no further diagnosis is necessary.
OBDII Code U1241 - Lost Communications With Scan Tool - AutoCodes.com
U1241 Code - Lost Communications With Scan Tool
What does this mean?

What are the Possible Causes of the DTC U1241?

  • No cause. Cycle Ignition Key and Clear Code.

How to Fix the DTC U1241?

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 does this mean?

Code Tech Notes

The Diagnostic Trouble Code (DTC) U1241 does not indicate a system malfunction and will not cause any warning indicators to illuminate. When DTC U1241 sets, cycle the ignition and use the scan tool to clear the code, no further diagnosis is necessary.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the U1241 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 U1241 code?

Need more information on how to fix the U1241 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U1241 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

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 U1241 Code

1. What does OBDII code U1241 mean?

Code U1241 indicates a loss of communication between the vehicle's control modules and the scan tool used for diagnostics.

2. What are common symptoms of code U1241?

Symptoms may include inability to access vehicle diagnostics, warning lights on the dashboard, or erratic vehicle behavior due to communication issues.

3. What causes code U1241 to appear?

Common causes include a faulty scan tool, damaged communication wiring, issues with the vehicle’s CAN bus network, or malfunctioning control modules.

4. How can I diagnose code U1241?

Start by checking the scan tool for defects, inspect the wiring and connectors for damage, and verify the integrity of the CAN bus network.

5. Can a faulty scan tool trigger code U1241?

Yes, a malfunctioning or incompatible scan tool can cause communication failure and trigger this code.

6. Is code U1241 related to a specific control module?

It can involve any control module connected to the network, but it primarily indicates a communication issue rather than a specific module failure.

7. How can I fix code U1241?

Repair or replace damaged wiring and connectors, ensure the scan tool is functional and compatible, and update or reprogram control modules if necessary.

8. Can code U1241 affect vehicle performance?

While it primarily impacts diagnostics, communication issues could lead to improper functioning of certain vehicle systems.

9. Does code U1241 always mean a hardware issue?

No, software glitches, outdated module firmware, or scan tool compatibility issues can also cause this code.

10. Can I clear code U1241 without repairing the issue?

Clearing the code may work temporarily, but the underlying problem must be resolved to prevent it from reappearing.

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