U065A code meaning
Lost Communication With Right Front Temperature Actuator
Network system Generic code U06xx codes Check engine light
What U065A means
The right front temperature actuator only exists where the right-hand front seat gets its own blend door, as in dual-zone systems; single-zone cars move one door for both sides and never run this check. GM lists U065A next to U0659 in its 2025 BCM tables, watching the frame AHDA05_Rsp with the same 11.5 s limit and Type B rating; in 25OBDG04B that slave is calibrated as not present, so the monitor stays idle on that build. Its GM partners are U1410 for corrupt counters and B2B06, B2B2B and B2B2C for travel faults. FCA shows how a failing right door feels: 2014-15 Town and Country and Grand Caravan blew hot air from the right vents until the actuator passed a wiTECH calibration or was renewed. Here the link itself is gone, so the right side holds its last mix.
U065A at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium, DIY possible
- Typical labor0.5 to 2.5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U065A
- Passenger side blows hot or cold no matter what is selected
- Right temperature setting has no effect while the left side works
- MIL possible on GM models with the code rated Type B
Common causes of U065A
- Most likelyRight temperature actuator electronics or motor failed
- PossibleWire to the actuator damaged behind the glovebox or console side panel
- Less likelyClimate module configured for the wrong number of zones after replacement
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Rf temp actuatorVehicle bus wiring
What each part of U065A means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 5A | The exact fault in that area. |
What to do next
- Note U065A and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about U065A
What does U065A mean?
U065A means "Lost Communication With Right Front Temperature Actuator". The right front temperature actuator only exists where the right-hand front seat gets its own blend door, as in dual-zone systems; single-zone cars move one door for both sides and never run this check. It is a generic code, so it means the same on every make.
Is it safe to drive with U065A?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will U065A fail an emissions test?
Yes, it can. U065A is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is U065A to fix?
Difficulty: medium. A typical repair takes 0.5 to 2.5 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will U065A clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.