Quick Answer
U0712 means: The U0712 code indicates a communication failure between the transmission control module and other vehicle modules.
Can I drive with U0712? Immediate attention is recommended to prevent further transmission damage.
Common Questions
What does U0712 mean and how does it affect my car?
The U0712 code signifies that your vehicle's transmission control module is having trouble communicating with other modules in your car. This can result in issues like erratic shifting, poor acceleration, and may cause your vehicle to go into limp mode, significantly affecting driving performance.
What are the most common causes of U0712 and how much does it cost to fix?
Common causes of U0712 include a faulty transmission control module, damaged wiring, or software issues. Repair costs can range from $150 for wiring repairs to $1200 for TCM replacement, depending on the specific issue.
Can I drive my car with U0712 or should I stop immediately?
It is not advisable to drive your vehicle if the U0712 code is present. Continuing to drive may lead to further transmission damage and safety risks. It's best to seek immediate professional help.
How can I diagnose U0712 myself using GeekOBD APP?
You can diagnose U0712 using the GeekOBD APP by connecting it to your vehicle's OBD2 port, running a scan to retrieve error codes, and reviewing freeze frame data to understand the conditions under which the error occurred.
What vehicles are most commonly affected by U0712?
Common vehicles affected by the U0712 code include 2015-2018 Chrysler 200, Dodge Dart, and Jeep Cherokee models, among others. Owners should check for any recalls or service bulletins related to transmission issues.
How can I prevent U0712 from happening again?
To prevent U0712 from recurring, ensure regular maintenance checks on your vehicle's wiring and connectors, keep software updated, and promptly address any warning lights or symptoms that arise.
What is U0712?
The U0712 diagnostic trouble code (DTC) indicates a 'Communication Bus Off' condition, which signifies that the transmission control module (TCM) is unable to communicate with the other modules in the vehicle's network. This issue can lead to significant performance problems, as the TCM relies on data from various sensors and modules to function correctly. When the U0712 code is triggered, it usually means that there's a disruption in the controller area network (CAN) or a failure in one of the modules involved in communication. It is crucial for car owners to understand that this code can cause erratic shifting, poor acceleration, and even lead to the vehicle going into limp mode. This condition is often accompanied by the illumination of the check engine light, and if not addressed promptly, it could result in further damage to the transmission system or other related components. This issue is particularly common in 2015-2018 models of Chrysler, Dodge, and Jeep vehicles, making it essential for owners of these vehicles to be aware of this code and its implications.
System: U - Network (Communication, CAN Bus)
Symptoms
Common symptoms when U0712 is present:
- The check engine light remains illuminated, signaling a problem with the vehicle's transmission system.
- Drivers may experience erratic shifting or difficulty in changing gears, leading to a frustrating driving experience.
- Fuel economy may decrease by 10-15% due to the engine running inefficiently or in limp mode.
- The vehicle may go into limp mode, which limits engine power and speed to prevent further damage.
- You might notice unusual noises from the transmission, such as grinding or whining during operation.
Possible Causes
Most common causes of U0712 (ordered by frequency):
- The most common cause is a faulty transmission control module, which is responsible for processing signals from other modules - likelihood: 60%.
- Another potential cause is damaged wiring or connectors in the CAN network, which can disrupt communication between modules.
- A less common cause could be software issues within the TCM that may require reprogramming or updating.
- Severe issues such as internal transmission failure may also trigger this code, although this is rare.
- External factors like water intrusion or corrosion in connectors can lead to communication failures.
U0712 Repair Costs
Cost Breakdown by Repair Type
TCM Replacement
Replacing the faulty transmission control module with a new one.
- Total: $600 - $1200
- Success rate: 90%
Wiring Repair
Repairing or replacing damaged wiring or connectors that affect communication.
- Total: $150 - $400
- Success rate: 85%
Software Update
Updating or reprogramming the TCM software to resolve communication issues.
- Total: $100 - $300
- Success rate: 70%
Money-Saving Tips for U0712
- 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 U0712 Diagnosis Process
Follow these systematic steps to accurately diagnose U0712. Each step builds on the previous one to ensure accurate diagnosis.
Step 1: Step 1: Perform an initial visual inspection of the vehicle's wiring and connectors related to the transmission
Step 1: Perform an initial visual inspection of the vehicle's wiring and connectors related to the transmission. Look for any signs of damage, corrosion, or loose connections (5-10 minutes).
Step 2: Step 2: Use the GeekOBD APP to conduct an OBD2 scan, retrieving the U0712 code along with any other related codes to gather context (10-15 minutes)
Step 2: Use the GeekOBD APP to conduct an OBD2 scan, retrieving the U0712 code along with any other related codes to gather context (10-15 minutes).
Step 3: Step 3: Conduct component testing on the TCM and other related modules using a multimeter or specialized diagnostic tools to ensure they are functioning correctly (20-30 minutes)
Step 3: Conduct component testing on the TCM and other related modules using a multimeter or specialized diagnostic tools to ensure they are functioning correctly (20-30 minutes).
Step 4: Step 4: If any repairs are made, perform a system function test to verify proper operation and clear any codes (10-15 minutes)
Step 4: If any repairs are made, perform a system function test to verify proper operation and clear any codes (10-15 minutes).
Step 5: Step 5: Complete a road test under various driving conditions to confirm that the issue has been resolved and that no codes reappear (15-20 minutes)
Step 5: Complete a road test under various driving conditions to confirm that the issue has been resolved and that no codes reappear (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: Chrysler 200 Transmission Communication Issue
Vehicle: 2016 Chrysler 200, 75,000 miles
Problem: Customer reported the check engine light was on and experienced erratic shifting.
Diagnosis: Using the GeekOBD APP, we retrieved the U0712 code along with other codes indicating TCM failure.
Solution: Replaced the transmission control module and repaired damaged wiring.
Cost: $950 (parts: $700 for TCM, $250 for labor)
Result: After repairs, the vehicle shifted smoothly without any codes reappearing.
Case Study 2: Jeep Cherokee Communication Failure
Vehicle: 2017 Jeep Cherokee, 60,000 miles
Problem: Customer complained of limp mode and poor acceleration.
Diagnosis: Diagnostic testing revealed U0712 along with wiring issues in the CAN network.
Solution: Repaired the wiring harness and updated the TCM software.
Cost: $400 (parts: $100 for wiring, $300 for labor)
Result: Post-repair, the Jeep operated normally, and the customer noticed improved performance.