U0140 RAM Code - Lost Communication With Body Control Module
Quick Answer
When the ignition is activated and the battery voltage remains within the range of 10 to 16 volts, with the Body Control Module (BCM) properly configured, continuous monitoring of the BCM occurs. Common causes include Body Control Module (BCM) not configured correctly, Faulty Body Control Module, Body Control Module harness is open or shorted. 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
- U0140 RAM indicates Lost Communication With Body Control Module.
- Common causes
- Common causes include Body Control Module (BCM) not configured correctly, Faulty Body Control Module, Body Control Module harness is open or shorted.
- 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 U0140 RAM Description
What are the Possible Causes of the DTC U0140 RAM?
- Body Control Module (BCM) not configured correctly
- Faulty Body Control Module
- Body Control Module harness is open or shorted
- Body Control Module circuit poor electrical connection
How to Fix the DTC U0140 RAM?
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 U0140 RAM 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 U0140 RAM Code
1. What does OBD-II code U0140 on a RAM vehicle mean?
U0140 indicates the vehicle has lost communication with the Body Control Module (BCM), which manages various electrical systems.
2. What are the common symptoms of code U0140 in a RAM vehicle?
Symptoms may include malfunctioning interior lights, power windows, locks, or issues with the dashboard displays and gauges.
3. What causes the U0140 code in RAM vehicles?
Common causes include damaged wiring or connectors, a faulty BCM, or problems with the power supply to the BCM.
4. Can a dead battery trigger the U0140 code in RAM vehicles?
Yes, a dead or weak battery can disrupt communication with the BCM and trigger this code.
5. How do you diagnose the U0140 code in a RAM vehicle?
Start by checking the BCM’s wiring and connectors for damage or corrosion. Use a scan tool to verify communication with the BCM.
6. Can a faulty BCM cause the U0140 code?
Yes, if the BCM itself is defective, it may fail to communicate with other modules, triggering the U0140 code.
7. Is it safe to drive a RAM vehicle with the U0140 code?
While the vehicle may still be drivable, electrical malfunctions can affect safety systems, so it’s best to address the issue promptly.
8. How do you fix the U0140 code in a RAM vehicle?
Repair or replace damaged wiring, connectors, or the BCM itself. Clear the code and retest the system.
9. Does the U0140 code require BCM replacement?
Not always; it’s best to thoroughly inspect wiring and connectors first, as they are common culprits before considering BCM replacement.
10. How much does it cost to fix the U0140 code in a RAM vehicle?
Costs vary depending on whether the issue is simple wiring repair or BCM replacement, which can range from $200 to $1,000 or more.
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