Quick Answer
U0335 means: U0335 indicates a communication error with the body control module.
Can I drive with U0335? It is advisable to address this issue as soon as possible to prevent further electrical problems.
Common Questions
What does U0335 mean and how does it affect my car?
DTC U0335 indicates a communication issue within your vehicle's body control module system. If unresolved, it may lead to various electrical failures, affecting systems like windows, locks, and lighting, potentially compromising safety and functionality.
What are the most common causes of U0335 and how much does it cost to fix?
Common causes include a faulty BCM, damaged wiring, and poor connections. Repair costs can range from $100 for wiring repairs to $800 for BCM replacement, depending on the specific issue.
Can I drive my car with U0335 or should I stop immediately?
While you may drive the car, it's not recommended to ignore this code. Ignoring U0335 can lead to further electrical issues, compromising safety. It's best to have it diagnosed and repaired promptly.
How can I diagnose U0335 myself using GeekOBD APP?
Using the GeekOBD APP, you can scan for codes, view live data, and access freeze frame data to understand the context of the U0335 code. Look for any abnormal data regarding the body control module.
What vehicles are most commonly affected by U0335?
U0335 is frequently reported in 2015-2018 Honda Civic models, as well as various other vehicles from manufacturers that utilize similar BCM systems. Always check for any known recalls related to your specific model.
How can I prevent U0335 from happening again?
Regular vehicle maintenance, including checking electrical connections and keeping the BCM software updated, can help prevent the occurrence of U0335. It's also advisable to keep the battery in good health to avoid voltage issues.
What is U0335?
DTC U0335 refers to a communication issue between the body control module (BCM) and the other modules in your vehicle. This code indicates that the BCM has detected a failure in data communication, potentially affecting various systems such as lights, windows, and locks. The root cause could range from a malfunctioning BCM to wiring issues or problems with the connectors. In practical terms, this might lead to intermittent failures in critical functionalities. For instance, you might notice that your power windows fail to operate or that your dashboard lights flicker. It's essential to address this code promptly because, if ignored, it could lead to further electrical failures, increased repair costs, and safety concerns. Driving a vehicle with unresolved communication codes can compromise your vehicle's operational efficiency and safety, especially in models like the 2015-2018 Honda Civic, which rely heavily on electronic systems.
System: U - Network (Communication, CAN Bus)
Symptoms
Common symptoms when U0335 is present:
- The check engine light stays on constantly, indicating a persistent issue that needs attention.
- Power windows may operate inconsistently, leading to frustration and potential safety risks.
- Dashboard lights may flicker or fail to illuminate, affecting visibility and safety during night driving.
- The car's central locking system may become nonfunctional, creating security concerns for the vehicle.
- You might experience random electrical failures in other systems, such as headlights or interior lighting.
Possible Causes
Most common causes of U0335 (ordered by frequency):
- The most common cause of U0335 is a faulty body control module, which has a likelihood of about 60%. This can happen due to internal component failures.
- Another possible cause is corroded or damaged wiring in the communication circuit, which might lead to a 25% chance of triggering the code. This can be identified through visual inspection.
- A third cause to consider is poor connections at the BCM or other related connectors. Regular maintenance can help prevent this issue.
- Less frequently, software glitches in the BCM's programming could also lead to this code. Updates or reprogramming may be required.
- In rare cases, a failing battery or alternator can cause voltage issues that impact communication, with a likelihood of about 5%.
U0335 Repair Costs
Cost Breakdown by Repair Type
BCM Replacement
Replacing the body control module if it is deemed faulty after diagnostics.
- Total: $500 - $800
- Success rate: 90%
Wiring Repair
Repairing or replacing damaged wiring connections associated with the BCM.
- Total: $100 - $300
- Success rate: 85%
Software Update
Reprogramming the BCM or updating the vehicle's software to resolve potential glitches.
- Total: $100 - $200
- Success rate: 70%
Money-Saving Tips for U0335
- Start with the most common and least expensive repairs first
- Use GeekOBD APP to confirm diagnosis before replacing expensive parts
- Consider preventive maintenance to avoid future occurrences
- Compare prices for OEM vs aftermarket parts based on your needs
- Address the issue promptly to prevent more expensive secondary damage
Diagnostic Steps
Professional U0335 Diagnosis Process
Follow these systematic steps to accurately diagnose U0335. Each step builds on the previous one to ensure accurate diagnosis.
Step 1: Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion (5-10 minutes)
Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion (5-10 minutes).
Step 2: Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context (10-15 minutes)
Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context (10-15 minutes).
Step 3: Step 3: Component testing - Use a multimeter to test suspected components and ensure they are functioning correctly (20-30 minutes)
Step 3: Component testing - Use a multimeter to test suspected components and ensure they are functioning correctly (20-30 minutes).
Step 4: Step 4: System function test - Verify proper operation after repairs and clear codes using the GeekOBD APP (10-15 minutes)
Step 4: System function test - Verify proper operation after repairs and clear codes using the GeekOBD APP (10-15 minutes).
Step 5: Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and check for recurring codes (15-20 minutes)
Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and check for recurring codes (15-20 minutes).
Important Notes
- Always verify the repair with GeekOBD APP after completing diagnostic steps
- Clear codes and test drive to ensure the problem is resolved
- Address underlying causes to prevent code recurrence
Real Repair Case Studies
Case Study 1: BCM Replacement in 2016 Honda Civic
Vehicle: 2016 Honda Civic, 45,000 miles
Problem: Customer reported intermittent power window failures and dashboard light flickering.
Diagnosis: Diagnostics revealed a U0335 code with faulty BCM communication.
Solution: Replaced the body control module and cleared the codes.
Cost: $750 (parts and labor included)
Result: All features operated correctly post-repair, and the customer reported satisfaction.
Case Study 2: Wiring Repair on 2017 Honda Accord
Vehicle: 2017 Honda Accord, 60,000 miles
Problem: Customer experienced central locking system failures.
Diagnosis: Inspection and diagnostics revealed corroded wiring connections leading to U0335.
Solution: Repaired the corroded wiring and ensured solid connections.
Cost: $200 (simple repair with minimal parts)
Result: Central locking system function restored, and no further issues reported.