U061F code meaning
Lost Communication With Exhaust Gas Temperature Sensor Bank 1 Sensor 1
Network system Generic code U06xx codes Check engine light
What U061F means
Many current exhaust temperature sensors are active: a thermocouple probe, often type N, feeds a small electronics module that turns the reading into SENT or CAN messages, as in the Sensience 22J sensor. U061F means valid messages from the bank 1, position 1 sensor (normally the most upstream one) have stopped. GM's 2025 diesel tables (25OBDG04A and 25OBDG04B) define it for a SENT sensor: any message fault, or messages that are too old, counted in 19 of 25 samples taken every 100 ms once the sensor start-up delay has passed and the engine is not cranking; Type A, so the MIL lights in the first trip. GM also stores a second code tied to the controller input the sensor is wired to. Bentley saw it with U0621 on 2020-on V8 Continental and Flying Spur cars whose harness chafed on a wheel-arch bracket.
U061F 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 U061F
- Check engine or emission warning lamp
- Further codes for the controller input or the second bank
- Particulate filter regeneration may be postponed
Common causes of U061F
- Most likelySensor harness rubbing through on a bracket or subframe edge (Bentley V8)
- PossibleConnector or module of the sensor damaged by exhaust heat
- PossibleInternal fault of the active sensor that shuts its SENT output off
- Less likelyMissing 5 V supply or ground from the controller
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Egt sensor bank 1 sensor 1Sensor wiring
What each part of U061F means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 1F | The exact fault in that area. |
What to do next
- Note U061F 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 U061F
What does U061F mean?
U061F means "Lost Communication With Exhaust Gas Temperature Sensor Bank 1 Sensor 1". Many current exhaust temperature sensors are active: a thermocouple probe, often type N, feeds a small electronics module that turns the reading into SENT or CAN messages, as in the Sensience 22J sensor. It is a generic code, so it means the same on every make.
Is it safe to drive with U061F?
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 U061F fail an emissions test?
Yes, it can. U061F 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 U061F 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 U061F clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.