Network, generic

U0270 Lost Communication With Image Processing Sensor L

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

U0270 ends the image sensor series, and no vehicle maker documents it publicly, so the camera behind letter L is unknown. Twelve letters reflect how many image sensors a vehicle can carry, and they compete for a limited number of receiver inputs: Texas Instruments' DS90UB954 hub, for example, combines one or two camera or radar links. Freightliner ran into such a limit on trucks with Detroit Assurance 5.0, where a retrofitted Bendix forward camera for better video capture needed a port that the factory driver-facing camera already used, so the two could not be combined (dealer letter, February 2020). A sensor that is wired but not configured, or the reverse, is worth ruling out before blaming the link. Losing sensor L disables only its own function; no MIL.

Likely causes

Sensor fitted or retrofitted without matching configuration, or configured but absent
Link cable or connector to sensor L interrupted
Sensor L without supply
Sensor L internally faulty

Symptoms

  • Function of sensor L unavailable with a service message
  • Fault right after retrofitting or replacing a camera

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€0–1,000
Time0.3–3 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

image processing sensor lvehicle bus wiring

Related codes

U0571U026F

References: static.nhtsa.gov, ti.com.