U18CF Code - Lost Communication With Active Safety Control Module 1 On High Speed CAN Bus
Quick Answer
Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Active Safety Control Module 1, Active Safety Control Module 1 harness is open or shorted, Active Safety Control Module 1 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
- U18CF indicates Lost Communication With Active Safety Control Module 1 On High Speed CAN Bus.
- Common causes
- Common causes include Faulty Active Safety Control Module 1, Active Safety Control Module 1 harness is open or shorted, Active Safety Control Module 1 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 U18CF Description
What are the Possible Causes of the DTC U18CF?
- Faulty Active Safety Control Module 1
- Active Safety Control Module 1 harness is open or shorted
- Active Safety Control Module 1 circuit poor electrical connection
How to Fix the DTC U18CF?
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 U18CF 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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Information for Specific Makes
- U18CF Buick — Lost Communication With Active Safety Control Module 1 On High Speed CAN Bus
- U18CF Cadillac — Lost Communication With Active Safety Control Module 1 On High Speed CAN Bus
- U18CF Chevrolet — Lost Communication With Active Safety Control Module 1 On High Speed CAN Bus
- U18CF GMC — Lost Communication With Active Safety Control Module 1 On High Speed CAN Bus
Frequently Asked Questions about U18CF Code
1. What are the common symptoms of OBDII code U18CF?
- Common symptoms include the malfunction indicator light (MIL) illuminating, loss of communication with the active safety control module, and potential issues with high-speed CAN bus communication.
2. What are the possible causes of OBDII code U18CF?
- Possible causes may include a faulty active safety control module, damaged wiring or connectors in the high-speed CAN bus circuit, software issues, or a problem with the power supply to the module.
3. How can I diagnose OBDII code U18CF?
- Diagnosis typically involves using a professional OBDII scanner to retrieve the code, checking for other related codes, inspecting the wiring and connectors for damage, and testing the active safety control module and CAN bus communication.
4. What repairs are commonly needed for OBDII code U18CF?
- Repairs may involve replacing the active safety control module if it is faulty, repairing or replacing damaged wiring or connectors, updating software if necessary, and ensuring proper power supply to the module.
5. Can I drive my vehicle with OBDII code U18CF?
- It is not recommended to drive your vehicle with this code present, as it may indicate a potential safety issue related to the active safety control module and high-speed CAN bus communication.
6. How much does it typically cost to repair OBDII code U18CF?
- The cost of repairs for this code can vary depending on the specific cause of the issue, but it may range from a few hundred to a thousand dollars, including parts and labor.
7. Is OBDII code U18CF a common problem in certain vehicle makes and models?
- This code may be more common in vehicles equipped with advanced safety systems that rely on the active safety control module and high-speed CAN bus communication, such as newer model cars with advanced driver assistance systems (ADAS).
8. Can resetting the OBDII code U18CF resolve the issue temporarily?
- Resetting the code may temporarily clear the MIL, but if the underlying issue causing the lost communication is not addressed, the code is likely to return and should be properly diagnosed and repaired.
9. Are there any DIY solutions for fixing OBDII code U18CF?
- Due to the complexity of the systems involved, DIY solutions for this code are limited. It is recommended to have the issue diagnosed and repaired by a qualified automotive technician.
10. How can I prevent OBDII code U18CF from recurring in the future?
- To prevent the code from recurring, it is essential to address the root cause of the communication loss, perform regular maintenance on the vehicle's electrical system, and address any related issues promptly to avoid further complications.
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