U0146 Chevrolet Code - Lost Communication With Serial Data Gateway Module
Quick Answer
Modules connected to the high speed General Motor Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Serial Data Gateway Module, Serial Data Gateway Module harness is open or shorted, Serial Data Gateway 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
- U0146 Chevrolet indicates Lost Communication With Serial Data Gateway Module.
- Common causes
- Common causes include Faulty Serial Data Gateway Module, Serial Data Gateway Module harness is open or shorted, Serial Data Gateway 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 U0146 Chevrolet Description
Pictures shown may vary from actual
What are the Possible Causes of the DTC U0146 Chevrolet?
- Faulty Serial Data Gateway Module
- Serial Data Gateway Module harness is open or shorted
- Serial Data Gateway Module circuit poor electrical connection
How to Fix the DTC U0146 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 is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the U0146 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.
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Frequently Asked Questions about U0146 Chevrolet Code
1. What does the OBDII code U0146 mean on a Chevrolet?
The U0146 code indicates that the vehicle has lost communication with the Serial Data Gateway Module, which is responsible for managing communication between various vehicle systems.
2. What are the common symptoms of a U0146 code in a Chevrolet?
Symptoms may include a malfunctioning infotainment system, inoperative dashboard features, warning lights on the instrument cluster, or failure of certain electrical components to function.
3. What causes the U0146 code to appear in a Chevrolet?
The code can be triggered by a faulty Serial Data Gateway Module, damaged wiring or connectors, a software issue, or disruptions in the CAN (Controller Area Network) communication.
4. Can a dead battery cause the U0146 code in a Chevrolet?
Yes, a dead or weak battery can disrupt communication between modules, potentially triggering the U0146 code.
5. How do you diagnose a U0146 code in a Chevrolet?
Diagnosis involves using a scan tool to check for other related codes, inspecting the wiring and connectors for damage, testing the Serial Data Gateway Module, and verifying the vehicle’s battery voltage.
6. Is it safe to drive a Chevrolet with a U0146 code?
While the vehicle may still be drivable, certain features or systems may not work properly, which could affect safety or performance. It’s best to address the issue promptly.
7. How can I fix the U0146 code in my Chevrolet?
Repairs may include replacing the Serial Data Gateway Module, repairing or replacing damaged wiring, updating module software, or resetting the system with a scan tool.
8. Can a software update fix the U0146 code in a Chevrolet?
Yes, in some cases, a software update for the affected module or the Serial Data Gateway Module can resolve communication issues and clear the code.
9. What tools are needed to troubleshoot the U0146 code in a Chevrolet?
You’ll need an OBDII scan tool capable of reading manufacturer-specific codes, a multimeter for testing wiring, and possibly access to the vehicle’s service manual for wiring diagrams.
10. How much does it cost to fix the U0146 code on a Chevrolet?
The cost depends on the root cause. Software updates or resetting the system may be inexpensive, but replacing the Serial Data Gateway Module or repairing wiring could cost several hundred dollars.
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