U156D Code - Chassis Control Module Lost Communication With Transmission Shift Lever On LIN Bus
Quick Answer
The Local Interconnect Network (LIN) Bus consists of a single wire with a transmission rate of 10.417 Kbit/s. Common causes include Faulty Transmission Shift Lever, Transmission Shift Lever harness is open or shorted, Transmission Shift Lever 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
- U156D indicates Chassis Control Module Lost Communication With Transmission Shift Lever On LIN Bus.
- Common causes
- Common causes include Faulty Transmission Shift Lever, Transmission Shift Lever harness is open or shorted, Transmission Shift Lever 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 U156D Description
What are the Possible Causes of the DTC U156D?
- Faulty Transmission Shift Lever
- Transmission Shift Lever harness is open or shorted
- Transmission Shift Lever circuit poor electrical connection
- Faulty Chassis Control Module
How to Fix the DTC U156D?
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 U156D 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
- U156D Buick — Chassis Control Module Lost Communication With Transmission Shift Lever On LIN Bus
- U156D Cadillac — Chassis Control Module Lost Communication With Transmission Shift Lever On LIN Bus
- U156D Chevrolet — Chassis Control Module Lost Communication With Transmission Shift Lever On LIN Bus
- U156D GMC — Chassis Control Module Lost Communication With Transmission Shift Lever On LIN Bus
Frequently Asked Questions about U156D Code
1. What are the common symptoms of OBDII code U156D?
- Common symptoms include issues with shifting gears, transmission not engaging properly, and warning lights on the dashboard.
2. What does the OBDII code U156D mean?
- The code indicates that the Chassis Control Module has lost communication with the Transmission Shift Lever on the LIN bus, which can affect the transmission's operation.
3. What are some possible causes of code U156D?
- Possible causes include a damaged LIN bus communication line, faulty transmission shift lever, malfunctioning Chassis Control Module, or loose wiring connections.
4. How can I diagnose the source of the communication loss between the Chassis Control Module and Transmission Shift Lever?
- Diagnosis typically involves checking the LIN bus communication line for damage, inspecting the transmission shift lever for any faults, and using a diagnostic scanner to read the codes and troubleshoot.
5. Can I drive my vehicle with the U156D code present?
- It is not recommended to drive the vehicle with code U156D present, as it can lead to transmission issues and potential safety hazards. It is best to address the problem promptly.
6. What are some repair tips for fixing code U156D?
- Repair tips include checking and repairing any damaged wiring, replacing a faulty transmission shift lever, reprogramming the Chassis Control Module, or seeking assistance from a professional mechanic.
7. How much does it typically cost to repair OBDII code U156D?
- The cost of repairing code U156D can vary depending on the specific issue causing the communication loss. Costs may include labor charges, replacement parts, and diagnostic fees.
8. Can a DIY enthusiast fix code U156D at home?
- Some basic troubleshooting steps can be done at home, such as checking for loose connections or damaged wiring. However, more complex repairs may require specialized tools and expertise.
9. Is it necessary to clear the U156D code after making repairs?
- Yes, it is important to clear the code after making repairs to reset the system and ensure that the issue has been resolved. This can be done using a diagnostic scanner.
10. How can I prevent code U156D from recurring in the future?
- To prevent the recurrence of code U156D, it is essential to address any underlying issues promptly, perform regular maintenance on the vehicle's transmission system, and inspect wiring for wear and tear.
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