U1159 Code - Lost Communication With Automatic Sway Bar System Module
Quick Answer
The Diagnostic Trouble Code (DTC) sets if the Occupant Restraint Controller (ORC) BUS messages not received from the Automatic Sway Bar System Module (ASBS) or Final Drive Control Module (FDCM) for approximately two to five seconds. Common causes include Faulty Automatic Sway Bar System Module (ASBS) or Final Drive Control Module (FDCM), ASBS or FDCM harness is open or shorted, ASBS or FDCM 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
- U1159 indicates Lost Communication With Automatic Sway Bar System Module.
- Common causes
- Common causes include Faulty Automatic Sway Bar System Module (ASBS) or Final Drive Control Module (FDCM), ASBS or FDCM harness is open or shorted, ASBS or FDCM 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 U1159 Description
What are the Possible Causes of the DTC U1159?
- Faulty Automatic Sway Bar System Module (ASBS) or Final Drive Control Module (FDCM)
- ASBS or FDCM harness is open or shorted
- ASBS or FDCM circuit poor electrical connection
- Faulty Occupant Restraint Controller (ORC)
How to Fix the DTC U1159?
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 U1159 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.
Need more information about the U1159 code?
Need more information on how to fix the U1159 code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the U1159 code diagnosed by a professional: Find a repair shop in your area
Information for Specific Makes
- U1159 Chrysler — Lost Communication With Automatic Sway Bar System Module
- U1159 Dodge — Lost Communication With Automatic Sway Bar System Module
- U1159 Jeep — Lost Communication With Automatic Sway Bar System Module
- U1159 RAM — Lost Communication With Automatic Sway Bar System Module
Frequently Asked Questions about U1159 Code
What does the OBDII code U1159 mean?
U1159 indicates a loss of communication between the vehicle’s Automatic Sway Bar System Module and other control modules.
What are common symptoms of code U1159?
Symptoms may include a warning light on the dashboard, reduced suspension performance, or the sway bar system failing to engage/disengage properly.
What causes the U1159 code to appear?
Common causes include faulty wiring or connectors, a malfunctioning Automatic Sway Bar System Module, or problems with the vehicle’s CAN bus network.
Can I still drive my vehicle with code U1159?
While the vehicle may still be drivable, you may experience reduced handling or suspension performance. It’s best to address the issue promptly.
How can I diagnose the U1159 code?
Start by inspecting the wiring and connectors for damage, check for loose connections, and use a diagnostic scanner to verify communication between modules.
What repairs are commonly needed for code U1159?
Repairs may include fixing damaged wiring, replacing faulty connectors, or replacing the Automatic Sway Bar System Module if it’s defective.
Is the U1159 code specific to certain vehicle brands?
Yes, U1159 is more common in vehicles equipped with advanced sway bar systems, typically found in off-road or performance-oriented models.
How much does it cost to fix code U1159?
Repair costs vary depending on the issue, but replacing the sway bar module can range from $300 to $800, excluding labor.
Can a low battery cause the U1159 code?
Yes, a weak or failing battery can disrupt communication between modules and trigger this code.
Do I need to reprogram the sway bar module if replaced?
In most cases, yes. Reprogramming ensures the new module properly integrates with the vehicle’s communication network.
Discuss the causes and fixes for U1159 OBDII Code
Code U1159 comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
