U1299 Honda 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 Honda 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 Honda Description
What are the Possible Causes of the DTC U1299 Honda?
- 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 Honda?
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 Honda 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 U1299 Honda Code
What does the OBDII code U1299 mean for a Honda vehicle?
The U1299 code indicates that the Door Multiplex Control Unit has lost communication with the Climate Control Unit, which can affect climate control functions.
What symptoms might I experience if my Honda has the U1299 code?
Common symptoms include malfunctioning climate control settings, inoperable air conditioning or heating, and potential warning lights on the dashboard.
What are the possible causes of the U1299 code in a Honda?
Possible causes include faulty wiring or connectors, a defective Door Multiplex Control Unit, a malfunctioning Climate Control Unit, or issues with the vehicle’s network communication.
How can I diagnose the U1299 code in my Honda?
To diagnose the U1299 code, start by checking the wiring and connectors for damage, then test the Door Multiplex Control Unit and Climate Control Unit for proper operation using a scan tool.
Is it safe to drive my Honda if it has the U1299 code?
While it may be safe to drive, you may experience issues with climate control functions, so it’s recommended to have the issue diagnosed and repaired as soon as possible.
Can I fix the U1299 code myself?
If you have experience with automotive electrical systems, you may be able to inspect wiring and connectors. However, replacing control units may require professional assistance.
What should I do if I clear the U1299 code but it comes back?
If the code returns after clearing it, further diagnosis is needed to identify the root cause, as it indicates an ongoing communication issue.
How much might it cost to repair the U1299 code issue in a Honda?
Repair costs can vary widely depending on the cause, but expect to pay anywhere from $100 to $500 or more if control units need to be replaced or extensive wiring repairs are necessary.
Can other OBDII codes be related to U1299?
Yes, other codes related to communication issues or climate control may accompany U1299, so it's wise to check for additional codes during diagnosis.
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