U1136 Code - Invalid Or Missing Data For Telltales
Quick Answer
Modules connected to the class 2 serial data circuit monitor for serial data communications during normal vehicle operation. Common causes include Faulty Module that is not communicating, Module harness is open or shorted, 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
- U1136 indicates Invalid Or Missing Data For Telltales.
- Common causes
- Common causes include Faulty Module that is not communicating, Module harness is open or shorted, 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 U1136 Description
What are the Possible Causes of the DTC U1136?
- Faulty Module that is not communicating
- Module harness is open or shorted
- Module circuit poor electrical connection
How to Fix the DTC U1136?
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 U1136 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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Frequently Asked Questions about U1136 Code
1. What does the OBDII code U1136 mean?
The U1136 code indicates "Invalid Or Missing Data For Telltales," meaning the vehicle's control modules are not receiving proper data related to dashboard warning lights or indicators.
2. What are the common symptoms of the U1136 code?
Symptoms may include malfunctioning or unlit dashboard warning lights, inconsistent telltale behavior, or a failure to display critical alerts.
3. What causes the U1136 code to appear?
Common causes include faulty communication between control modules, a damaged wiring harness, a defective instrument cluster, or a software issue in the vehicle's network.
4. Can a loose connection trigger the U1136 code?
Yes, a loose or corroded connection in the CAN bus or wiring harness can disrupt communication and trigger this code.
5. How is the U1136 code diagnosed?
A technician uses an advanced scan tool to check for communication errors in the CAN bus, inspects wiring and connections, and tests the functionality of the related control modules.
6. Can I drive with the U1136 code active?
Driving is possible, but it's not recommended, as critical dashboard alerts like check engine or airbag warnings may not function properly, compromising safety.
7. How can I fix the U1136 code?
Potential fixes include repairing or replacing damaged wiring, cleaning corroded connectors, reprogramming the control module, or replacing a faulty instrument cluster.
8. Does a software update resolve the U1136 code?
A software update may solve the issue if the problem stems from a known glitch in the vehicle's communication system.
9. Can a weak battery cause the U1136 code?
Yes, a weak or failing battery can cause communication errors between modules, potentially triggering this code.
10. What tools are needed to troubleshoot the U1136 code?
Key tools include an advanced OBDII scan tool, a multimeter for testing electrical connections, and the vehicle’s wiring diagrams for reference.
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