U12AA Code - Lost Communication With Shifter
Quick Answer
The Controller Area Network (CAN) transmits/receives pulsing signals to/from the control modules simultaneously by using F-CAN A and B signal lines. Common causes include Faulty SBW Shifter Control Module, SBW Shifter Control Module harness is open or shorted, SBW Shifter 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
- U12AA indicates Lost Communication With Shifter.
- Common causes
- Common causes include Faulty SBW Shifter Control Module, SBW Shifter Control Module harness is open or shorted, SBW Shifter 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 U12AA Description
What are the Possible Causes of the DTC U12AA?
- Faulty SBW Shifter Control Module
- SBW Shifter Control Module harness is open or shorted
- SBW Shifter Control Module circuit poor electrical connection
- Faulty Transmission Control Module (TCM)
How to Fix the DTC U12AA?
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 U12AA 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
- U12AA Acura — Lost Communication With Shifter
- U12AA Honda — Lost Communication With Shifter
- U12AA Infiniti — AV Control Unit Configuration Error
- U12AA Nissan — AV Control Unit Configuration Error
Frequently Asked Questions about U12AA Code
1. What are the common symptoms of OBDII code U12AA (Lost Communication With Shifter)?
- Common symptoms include the inability to shift gears, the shifter being stuck in a particular position, and warning lights on the dashboard related to transmission issues.
2. What are possible causes of OBDII code U12AA?
- The code U12AA typically indicates a communication problem between the vehicle's transmission control module and the shifter assembly. Possible causes include wiring issues, a faulty shifter assembly, or a malfunctioning transmission control module.
3. How can I diagnose the cause of OBDII code U12AA?
- Diagnosis typically involves checking the wiring connections between the transmission control module and the shifter assembly, inspecting for any damaged or corroded wires, and using a diagnostic scanner to retrieve specific error codes.
4. Can I still drive my vehicle with OBDII code U12AA?
- It is not recommended to drive your vehicle with code U12AA present, as it may affect the ability to shift gears properly and compromise overall driving safety. It is advisable to address the issue promptly.
5. How can I repair OBDII code U12AA?
- Repair options may include checking and repairing any damaged wiring, replacing the shifter assembly if necessary, or reprogramming the transmission control module. It is recommended to consult a professional mechanic for an accurate diagnosis and repair.
6. Will resetting the OBDII code U12AA make it go away permanently?
- Resetting the code may temporarily clear the warning lights, but if the underlying issue causing the code is not addressed, it is likely to reappear. It is crucial to diagnose and fix the root cause of the problem to prevent the code from recurring.
7. How much does it typically cost to repair OBDII code U12AA?
- The cost of repairing code U12AA can vary depending on the specific cause of the issue, labor costs, and the price of any replacement parts needed. It is advisable to obtain multiple quotes from reputable repair shops to compare costs.
8. Can a DIY enthusiast fix OBDII code U12AA at home?
- While some DIY enthusiasts may have the skills to address wiring issues or replace components like the shifter assembly, diagnosing and repairing communication problems between the transmission control module and shifter assembly may require specialized tools and expertise best left to professional mechanics.
9. How urgent is it to address OBDII code U12AA?
- It is advisable to address code U12AA promptly to prevent potential transmission-related issues and ensure the safe operation of your vehicle. Ignoring the code may lead to difficulty shifting gears or other transmission problems.
10. Is OBDII code U12AA a common issue in certain vehicle makes and models?
- While code U12AA can occur in various vehicle makes and models, it may be more commonly reported in vehicles equipped with electronic shifters or advanced transmission control systems.
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