U18A2 2017 Chevrolet Silverado Code - Lost Communication with Fuel Pump Driver Control Module
Quick Answer
Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Fuel Pump Driver Control Module, Fuel Pump Driver Control Module harness is open or shorted, Fuel Pump Driver 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
- U18A2 2017 Chevrolet Silverado indicates Lost Communication with Fuel Pump Driver Control Module.
- Common causes
- Common causes include Faulty Fuel Pump Driver Control Module, Fuel Pump Driver Control Module harness is open or shorted, Fuel Pump Driver 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 U18A2 2017 Chevrolet Silverado Description
What are the Possible Causes of the DTC U18A2 2017 Chevrolet Silverado?
- Faulty Fuel Pump Driver Control Module
- Fuel Pump Driver Control Module harness is open or shorted
- Fuel Pump Driver Control Module circuit poor electrical connection
How to Fix the DTC U18A2 2017 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.
Code Tech Notes
- 2014-2018 Chevrolet Silverado
- 2015-2018 Chevrolet Suburban
- 2015-2018 Chevrolet Tahoe
If the Diagnostic Trouble Codes (DTC) P2635, U0074, and/or U18A2 are set, it may be found that the actual fuel pressure (low-pressure system) will be reading substantially higher than desired fuel pressure, in this case, the cause of the problem is a loss of communication between Engine Control Module (ECM) and Fuel Pump Control Module (FPCM).
- Diagnose for any communication DTCs set (U0074 would take priority over U18A2 if both set) before addressing DTC P2635.
- If DTC P2635 is not resolved by correcting the communication DTCs, only then should diagnose the DTC P2635.
- It has been found that a communication issue between the FPCM and ECM can potentially induce DTC P2635 and result in a pressure differential between actual and desired fuel system pressures.
- If the actual fuel pressure is substantially higher than desired (10 psi / 70 kPa or more), replacement of the fuel pump control module or fuel system components typically will not resolve this issue.
- If the actual fuel pressure is substantially lower than desired (10 psi / 70 kPa or more), this Factory Service Bulletin would NOT apply. It would be recommended to diagnose low actual fuel pressure.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the U18A2 2017 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 U18A2 2017 Chevrolet Silverado code?
Need more information on how to fix the U18A2 2017 Chevrolet Silverado code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the U18A2 2017 Chevrolet Silverado code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about U18A2 2017 Chevrolet Silverado Code
1. What are the common symptoms of OBDII code U18A2 in a 2017 Chevrolet Silverado related to "Lost Communication with Fuel Pump Driver Control Module"?
- Common symptoms may include the engine stalling, difficulty starting the vehicle, and issues with fuel delivery.
2. What are the possible causes of OBDII code U18A2 in a 2017 Chevrolet Silverado?
- Possible causes include a faulty fuel pump driver control module, wiring issues, loose connections, or a malfunctioning powertrain control module (PCM).
3. How can I diagnose the root cause of the "Lost Communication with Fuel Pump Driver Control Module" issue in my 2017 Chevrolet Silverado?
- It is recommended to perform a thorough inspection of the wiring harness, connectors, and modules associated with the fuel pump system. Using a diagnostic scanner to retrieve trouble codes can also help pinpoint the problem.
4. What are some repair tips for addressing OBDII code U18A2 in a 2017 Chevrolet Silverado?
- Repair tips may include checking and repairing any damaged wiring, ensuring proper connections, and potentially replacing the fuel pump driver control module if necessary.
5. Can I continue driving my 2017 Chevrolet Silverado with the U18A2 code indicating lost communication with the fuel pump driver control module?
- It is not recommended to continue driving the vehicle with this code present, as it can lead to further fuel system issues and potentially cause safety concerns.
6. Is it possible to reset the OBDII code U18A2 in a 2017 Chevrolet Silverado after addressing the communication issue with the fuel pump driver control module?
- After repairing the underlying issue causing the code, a diagnostic scanner can be used to clear the code and reset the vehicle's system.
7. How much does it typically cost to repair the "Lost Communication with Fuel Pump Driver Control Module" issue in a 2017 Chevrolet Silverado?
- The cost of repair can vary depending on the specific cause of the problem, but it may involve labor costs for diagnosis and repair, as well as potential part replacement expenses.
8. Is the U18A2 code related to the fuel pump driver control module a common issue in 2017 Chevrolet Silverado vehicles?
- While not extremely common, issues with the fuel pump driver control module and communication problems can occur in various vehicle models, including the 2017 Chevrolet Silverado.
9. Can a DIY enthusiast with some automotive knowledge fix the U18A2 code issue in a 2017 Chevrolet Silverado?
- Depending on the individual's skill level and access to tools, some DIY enthusiasts may be able to diagnose and repair the communication issue with the fuel pump driver control module. However, professional help is recommended for complex electrical system repairs.
10. Will fixing the U18A2 code issue improve the overall performance and fuel efficiency of a 2017 Chevrolet Silverado?
- Addressing the communication issue with the fuel pump driver control module can help restore proper fuel delivery and engine performance, potentially leading to improved overall vehicle performance and fuel efficiency.
Discuss the causes and fixes for U18A2 2017 Chevrolet Silverado OBDII Code
Code U18A2 2017 Chevrolet Silverado comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
