U069D code meaning
Lost Communication With Exhaust Gas Temperature Sensor Bank 2 Sensor 4
Network system Generic code U06xx codes Check engine light
What U069D means
Sensor 4 is normally the final measuring position in the bank 2 exhaust, often placed further down the aftertreatment where the controller judges how hot the gas leaves the filter or catalyst stages. U069D reports that this digital probe has gone silent on its data link. Code-level documentation from a maker is not public; CARB only demands that a coded digital input which stops talking gets a code of its own. Sensience builds such probes from a type N thermocouple and a control module that handles up to four probes on J1939 CAN or one or two on SENT, so one failed module can silence several positions at once. On bank 1 only GM's 25OBDG04A contains the matching code U069B, rated Type A. Wiring faults of an analog probe at this point use P2473 to P2477, while U069C is the third probe. Expect a lit MIL and regeneration being delayed.
U069D at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium, DIY possible
- Typical labor0.5 to 2 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U069D
- Check engine light
- Regeneration delayed or cancelled
Common causes of U069D
- Most likelyProbe lead melted or torn near the rear aftertreatment
- PossibleElectronics unit of the probe dead
- Less likelySupply fuse or feed wire of the probe faulty
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Egt sensor bank 2 sensor 4Vehicle bus wiring
What each part of U069D means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 9D | The exact fault in that area. |
What to do next
- Note U069D 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 U069D
What does U069D mean?
U069D means "Lost Communication With Exhaust Gas Temperature Sensor Bank 2 Sensor 4". Sensor 4 is normally the final measuring position in the bank 2 exhaust, often placed further down the aftertreatment where the controller judges how hot the gas leaves the filter or catalyst stages. It is a generic code, so it means the same on every make.
Is it safe to drive with U069D?
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 U069D fail an emissions test?
Yes, it can. U069D 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 U069D to fix?
Difficulty: medium. A typical repair takes 0.5 to 2 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will U069D clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.