U1299 Code - Door Multiplex Control Unit Lost Communication With Climate Control Unit
Quick Answer
The Diagnostic Trouble Code (DTC) sets when a communication malfunction was detected between the Climate Control Unit and the Door Multiplex Control Unit. Common causes include Faulty Climate Control Unit, Climate Control Unit harness is open or shorted, Climate Control Unit 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
- U1299 indicates Door Multiplex Control Unit Lost Communication With Climate Control Unit.
- Common causes
- Common causes include Faulty Climate Control Unit, Climate Control Unit harness is open or shorted, Climate Control Unit 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 U1299 Description
What are the Possible Causes of the DTC U1299?
- Faulty Climate Control Unit
- Climate Control Unit harness is open or shorted
- Climate Control Unit circuit poor electrical connection
- Faulty Door Multiplex Control Unit
How to Fix the DTC U1299?
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 U1299 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
- U1299 Acura — Door Multiplex Control Unit Lost Communication With Climate Control Unit
- U1299 Honda — Door Multiplex Control Unit Lost Communication With Climate Control Unit
Frequently Asked Questions about U1299 Code
1. What are common symptoms of OBDII code U1299 related to the Door Multiplex Control Unit losing communication with the Climate Control Unit?
- Common symptoms include issues with the climate control system not functioning properly, such as inconsistent temperature settings, fan speed problems, or the inability to adjust settings.
2. What are potential causes of OBDII code U1299 being triggered?
- The code U1299 can be triggered by wiring issues, a faulty door multiplex control unit, a malfunctioning climate control unit, or a communication breakdown between these two components.
3. How can I diagnose the cause of OBDII code U1299?
- Diagnosing the cause of U1299 may involve checking the wiring connections between the Door Multiplex Control Unit and Climate Control Unit, testing the units for functionality, and using a diagnostic tool to read live data and codes.
4. Can I still drive my vehicle with OBDII code U1299 present?
- It is not recommended to drive your vehicle with U1299 present, as it can affect the proper operation of the climate control system, leading to discomfort or potential safety issues.
5. How can I repair OBDII code U1299 related to the Door Multiplex Control Unit issue?
- Repairing U1299 may involve repairing or replacing damaged wiring, replacing the faulty Door Multiplex Control Unit or Climate Control Unit, or resetting the communication between these components.
6. Are there any DIY repair tips for resolving OBDII code U1299?
- DIY repair tips for U1299 may include checking and securing wiring connections, inspecting for any visible damage, and performing a reset of the control units to see if communication can be restored.
7. Is it necessary to visit a mechanic for OBDII code U1299, or can I fix it myself?
- While some basic troubleshooting can be done by the vehicle owner, resolving U1299 may require advanced diagnostics and repair skills, so it is often best to consult a qualified mechanic for proper diagnosis and repair.
8. Can weather conditions impact the occurrence of OBDII code U1299?
- Extreme weather conditions, such as temperature fluctuations or moisture exposure, can potentially impact the communication between the Door Multiplex Control Unit and Climate Control Unit, leading to the triggering of U1299.
9. What are the potential long-term effects of ignoring OBDII code U1299?
- Ignoring U1299 can lead to continued issues with the climate control system, potential strain on other vehicle components, decreased comfort while driving, and may even result in more severe electrical problems over time if left unresolved.
10. Is it possible for OBDII code U1299 to reoccur after repair?
- Yes, if the root cause of U1299 is not properly addressed during repair, such as fixing faulty wiring or replacing a malfunctioning control unit, the code may reoccur due to persistent communication issues between the components.
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