U1041 GMC Code - Invalid Or Missing Data For Electronic Brake Control Module
Quick Answer
Modules connected to the class 2 serial data circuit monitor for serial data communications during normal vehicle operation. Common causes include Faulty Electronic Brake Control Module (EBCM), Electronic Brake Control Module harness is open or shorted, Electronic Brake Control Module circuit poor electrical connection. 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
- U1041 GMC indicates Invalid Or Missing Data For Electronic Brake Control Module.
- Common causes
- Common causes include Faulty Electronic Brake Control Module (EBCM), Electronic Brake Control Module harness is open or shorted, Electronic Brake Control Module circuit poor electrical connection.
- 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.
Code U1041 GMC Description
What are the Possible Causes of the DTC U1041 GMC?
- Faulty Electronic Brake Control Module (EBCM)
- Electronic Brake Control Module harness is open or shorted
- Electronic Brake Control Module circuit poor electrical connection
How to Fix the DTC U1041 GMC?
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 U1041 GMC 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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Frequently Asked Questions about U1041 GMC Code
1. What are the common symptoms of OBDII code U1041 in a GMC vehicle?
- Common symptoms include the ABS warning light being illuminated on the dashboard, possible loss of traction control, and potential issues with the vehicle's braking system.
2. What does the OBDII code U1041 in a GMC indicate?
- This code indicates that there is invalid or missing data for the Electronic Brake Control Module (EBCM) in the vehicle.
3. What are some possible causes of the U1041 code in a GMC?
- Possible causes include a faulty EBCM, damaged wiring or connectors related to the EBCM, software issues, or communication problems within the vehicle's network.
4. How can I diagnose the U1041 code in my GMC?
- To diagnose the U1041 code, a professional scan tool capable of reading ABS codes is needed to retrieve specific information about the issue with the EBCM.
5. Can I continue driving my GMC with the U1041 code present?
- It is not recommended to continue driving your GMC with the U1041 code present, as it can lead to potential safety issues with the vehicle's braking system.
6. How can I repair the U1041 code in my GMC?
- Repairing the U1041 code typically involves inspecting and repairing any damaged wiring or connectors related to the EBCM, checking for software updates, or replacing the EBCM if necessary.
7. Will resetting the trouble codes make the U1041 code disappear?
- Resetting the trouble codes may temporarily clear the U1041 code, but if the underlying issue with the EBCM is not addressed, the code is likely to reappear.
8. Can a DIY enthusiast fix the U1041 code in a GMC?
- While some basic troubleshooting steps can be taken by a DIY enthusiast, diagnosing and repairing the U1041 code often requires specialized equipment and professional expertise.
9. How much does it cost to repair the U1041 code in a GMC?
- The cost of repairing the U1041 code can vary depending on the specific cause of the issue, but it may involve costs for parts, labor, and diagnostic services.
10. Is the U1041 code specific to GMC vehicles only?
- No, the U1041 code related to the Electronic Brake Control Module can be found in various makes and models of vehicles, not just limited to GMC.
Discuss the causes and fixes for U1041 GMC OBDII Code
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Hello William
We have a 1999 GMC Jimmy Envoy 4x4, problem, stalls, stumbles while driving in hot AZ. Restarts but dies
setting for 5 to 10 min. will start and drive away but dies again you can't make it to far. I had just filled the gas tank at Costco. No tools the next towed it home, DTC scanner showed no codes, drained all gas out of tank thinking water or filter problem. Fuel was clean I drained it through Schrader valve while vehicle was running. While running vehicle it stalled and fuel pressure stayed at 52-54 PSI, I thought it was fuel but it wasn't no codes with $25 dollar cheap scanner. Bought a better scanner pulled two codes P0463 Fuel level sensor high voltage, gas gauge quit over a year ago and reads fuel to half tank only. i just set the trip Odometer before 300 miles I get gas! The other code is U1041 code went through all 3 grounds wire brushed and reinstalled, fuses ok switched ABS relays in fuse box, EBCM connecters ok on EBCM, BRAKES worked find no problems. No ABS codes with the $150 dollar scanner I cant believe that! Looking at voltages on scanner Spark, fuel trim, crank sensor, TP, HEGOs, when it stalls look good. Battery voltage looks low to me only 12.6 volts and goes up to 13.5 volts, with RPM increase.
Looks like I need to take to dealer that have a better scanner than what I have. Looks like EBCM to me no ABS light on or check engine light just service engine light on. I read all your answers to the U1041 code and it was the only clear answers, thank you. The GMC we had for 5 years has 106K California used vehicle from older couple the torsion front suspension I don't care for but its been a great vehicle. Your thoughts
?
Thank you Robert-
Hey Robert, appreciate the detailed breakdown—sounds like you've done some solid digging already.
The fact that your 1999 Jimmy stalls in heat, restarts after cooling, and throws a U1041 (loss of comm with EBCM) but no fuel or ignition-related codes, points me in a few directions:
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Crankshaft position sensor (CKP) – These are notorious on these trucks for failing when hot and working again once cooled. They can fail intermittently without always setting a code, especially on older GM OBD2 systems. I’ve seen several cases just like yours where a new crank sensor fixed the issue—even with good fuel pressure.
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Ignition control module (ICM) – Another heat-sensitive component. When it fails, you lose spark but may not set a clear code. If the scanner shows RPM signal during crank but no start, the crank sensor is likely okay. If no RPM signal, that’s your clue.
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Voltage drop or weak alternator – You mentioned 13.5V max—might be a little low if you’re under load (AC on, lights, fans). Low voltage can trigger false network codes (like U1041) and mess with fuel or ignition timing. Try checking charging voltage with a known-good meter at idle and 2,000 RPM—should be 13.8–14.5V.
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Grounds & network – Good move cleaning the 3 main grounds. Also double-check the ground strap from engine to frame—it sometimes corrodes at the firewall. U1041 often flags when the ECM can’t talk to the EBCM during voltage drops or cranking.
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EBCM not likely the cause of the stalling – That module won’t cause engine stall, but a failing crank sensor or ICM can drop communication briefly if the ECM reboots or shuts down sensors during the failure.
My gut says crank sensor or ICM. If you don’t want to shotgun parts, drive with a spark tester or scanner showing live RPM during stall to catch it in the act.
Let me know if you want the crank sensor location or test steps—I’d be happy to guide you through it. Solid old truck, and you’ve clearly kept it in good shape.
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