AutoCodes – Chevrolet – U1241 Chevrolet

U1241 Chevrolet 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 Chevrolet 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 557

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code U1241 Chevrolet 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 Chevrolet - Lost Communications With Scan Tool - AutoCodes.com — U1241 Chevrolet Code - Lost Communications With Scan Tool

What does this mean?

What are the Possible Causes of the DTC U1241 Chevrolet?

No cause. Cycle Ignition Key and Clear Code.

How to Fix the DTC U1241 Chevrolet?

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 Chevrolet 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 Chevrolet code?

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

Need Help with the Code?

Get the U1241 Chevrolet 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 U1241 Chevrolet Code

1. What are the common symptoms of OBDII code U1241 in a Chevrolet related to lost communications with the scan tool?

- Common symptoms include the inability to communicate with the vehicle's onboard diagnostics system, intermittent issues with diagnostic tools, and potential loss of data transmission.

2. What are the possible causes of OBDII code U1241 in a Chevrolet indicating lost communications with the scan tool?

- Possible causes include faulty wiring or connectors, a malfunctioning scan tool or diagnostic equipment, issues with the vehicle's onboard computer system, or a damaged OBDII port.

3. How can I diagnose the source of OBDII code U1241 in my Chevrolet if I am experiencing communication issues with the scan tool?

- Start by checking the wiring and connectors for any damage or loose connections. Test the scan tool on another vehicle to rule out any equipment issues. If problems persist, consult a professional mechanic for further diagnosis.

4. Are there any specific repair tips for resolving OBDII code U1241 in a Chevrolet indicating lost communications with the scan tool?

- Ensure all wiring and connectors related to the OBDII system are in good condition and securely connected. Consider trying a different scan tool to establish communication with the vehicle's computer system.

5. Can a DIY enthusiast resolve OBDII code U1241 in a Chevrolet on their own, or is professional assistance recommended?

- DIY enthusiasts with experience in automotive diagnostics may attempt to troubleshoot and resolve communication issues with the scan tool. However, consulting a professional mechanic is advisable for accurate diagnosis and repair.

6. Is it safe to continue driving my Chevrolet with OBDII code U1241 related to lost communications with the scan tool?

- It is generally safe to drive the vehicle with this code, as it primarily indicates a communication issue rather than a critical system failure. However, it is recommended to address the problem promptly to prevent potential complications.

7. Can extreme weather conditions or environmental factors contribute to triggering OBDII code U1241 in a Chevrolet?

- Yes, extreme temperatures or moisture can affect the electrical connections and components associated with the OBDII system, potentially leading to communication problems and triggering the U1241 code.

8. Are there any software updates or recalls from Chevrolet that address issues with OBDII code U1241 and communication problems?

- Check with a Chevrolet dealership or visit the manufacturer's website to inquire about any software updates or recalls specifically related to OBDII code U1241 and communication issues.

9. Will resetting the OBDII system or clearing the code resolve OBDII code U1241 in a Chevrolet without addressing the underlying communication problem?

- Clearing the code may temporarily remove the warning light, but the underlying communication issue will persist. It is essential to diagnose and address the root cause to prevent the code from reoccurring.

10. Can a damaged OBDII port on a Chevrolet be a common factor contributing to OBDII code U1241 indicating lost communications with the scan tool?

- Yes, a damaged OBDII port can disrupt communication between the vehicle's onboard system and the scan tool, potentially triggering the U1241 code. Inspect the port for any physical damage and address as needed.