U1818 2014 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 2014 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 2014 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 2014 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 2014 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 2014 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 2014 Chevrolet Silverado code?
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Frequently Asked Questions about U1818 2014 Chevrolet Silverado Code
1. What are common symptoms of OBDII code U1818 in a 2014 Chevrolet Silverado?
- Common symptoms include the check engine light illuminating, loss of communication with the engine control module, and potential performance issues.
2. What does the OBDII code U1818 mean for a 2014 Chevrolet Silverado?
- The code U1818 indicates a communication problem with the Engine Control Module (ECM) on the Powertrain Expansion Communication Bus.
3. What are possible causes of the U1818 code in a 2014 Chevrolet Silverado?
- Possible causes include a loose or corroded connection in the communication bus, a faulty ECM, damaged wiring, or a malfunctioning control module.
4. How can I diagnose the U1818 code in a 2014 Chevrolet Silverado?
- Diagnosing the U1818 code typically involves inspecting the communication bus connections, checking for wiring issues, and using a diagnostic tool to scan for communication faults.
5. Can I still drive my 2014 Chevrolet Silverado with the U1818 code present?
- It is not recommended to drive the vehicle with the U1818 code present as it may lead to performance issues and potential safety concerns.
6. How can I repair the U1818 code in my 2014 Chevrolet Silverado?
- Repairing the U1818 code may involve fixing any loose connections, repairing damaged wiring, replacing a faulty ECM, or addressing any other identified communication bus issues.
7. Is it necessary to reset the OBDII code U1818 after making repairs in a 2014 Chevrolet Silverado?
- Yes, it is recommended to clear the code after making repairs to see if the issue has been successfully resolved and to reset the check engine light.
8. Can a DIY enthusiast fix the U1818 code in a 2014 Chevrolet Silverado?
- Depending on the specific issue, some DIY enthusiasts may be able to address simpler causes like loose connections, but more complex problems may require professional diagnosis and repair.
9. How much does it typically cost to repair the U1818 code in a 2014 Chevrolet Silverado?
- Repair costs for the U1818 code can vary widely depending on the cause of the issue, with expenses ranging from a simple wiring repair to a more costly ECM replacement.
10. Are there any preventive measures to avoid the U1818 code in a 2014 Chevrolet Silverado?
- Regularly checking and maintaining the vehicle's wiring connections and ensuring proper electrical system function can help prevent communication issues leading to the U1818 code.
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