U1818 2016 Chevrolet Silverado Code - Lost Communication with Engine Control Module on Powertrain Expansion Communication Bus
Quick Answer
Devices connected to the powertrain high-speed General Motor Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Engine Control Module (ECM), Engine Control Module harness is open or shorted, Engine 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
- U1818 2016 Chevrolet Silverado indicates Lost Communication with Engine Control Module on Powertrain Expansion Communication Bus.
- Common causes
- Common causes include Faulty Engine Control Module (ECM), Engine Control Module harness is open or shorted, Engine 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 U1818 2016 Chevrolet Silverado Description
The Diagnostic Trouble Code (DTC) will be set when a supervised periodic message that includes the transmitter device availability has not been received.
What are the Possible Causes of the DTC U1818 2016 Chevrolet Silverado?
- Faulty Engine Control Module (ECM)
- Engine Control Module harness is open or shorted
- Engine Control Module circuit poor electrical connection
How to Fix the DTC U1818 2016 Chevrolet Silverado?
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 U1818 2016 Chevrolet Silverado 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 U1818 2016 Chevrolet Silverado code?
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Frequently Asked Questions about U1818 2016 Chevrolet Silverado Code
1. What are common symptoms of OBDII code U1818 on a 2016 Chevrolet Silverado?
- Common symptoms include engine misfires, loss of power, stalling, and issues with transmission shifting.
2. What does the OBDII code U1818 indicate on a 2016 Chevrolet Silverado?
- The U1818 code indicates a communication problem between the Engine Control Module (ECM) and the Powertrain Expansion Communication Bus.
3. What are possible causes of the U1818 code on a 2016 Chevrolet Silverado?
- Possible causes include faulty wiring or connectors, a malfunctioning ECM, a defective Powertrain Expansion Communication Bus module, or a software issue.
4. How can I diagnose the U1818 code on my 2016 Chevrolet Silverado?
- Diagnosing the U1818 code typically involves checking the wiring and connectors for damage, inspecting the ECM and Communication Bus module, and using a diagnostic scanner to communicate with the modules.
5. Can I drive my 2016 Chevrolet Silverado with the U1818 code present?
- It is not recommended to drive with the U1818 code present, as it can lead to drivability issues and potentially cause further damage to the vehicle.
6. How can I repair the U1818 code on my 2016 Chevrolet Silverado?
- Repairing the U1818 code may involve repairing or replacing damaged wiring, connectors, the ECM, or the Communication Bus module. It may also require reprogramming the modules.
7. Is it possible to reset the U1818 code on a 2016 Chevrolet Silverado without repairs?
- While clearing the code with a diagnostic scanner may temporarily turn off the Check Engine Light, the underlying issue causing the code will still need to be addressed to prevent it from returning.
8. How much does it cost to repair the U1818 code on a 2016 Chevrolet Silverado?
- The cost of repairing the U1818 code can vary depending on the specific cause of the issue, the parts needed for repair, and labor costs. It is recommended to consult a professional mechanic for an accurate estimate.
9. Can a DIY enthusiast fix the U1818 code on a 2016 Chevrolet Silverado?
- While some basic troubleshooting and repairs can be done by DIY enthusiasts, diagnosing and repairing complex issues related to the U1818 code may require specialized tools and knowledge best handled by a professional mechanic.
10. How can I prevent the U1818 code from reoccurring on my 2016 Chevrolet Silverado?
- Regular maintenance, such as checking and cleaning connectors, inspecting wiring for wear, and keeping the ECM and Communication Bus modules updated with the latest software, can help prevent the U1818 code from reoccurring.
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