Network, generic

U0234 Lost Communication With Convenience Recall Module

Check engine lightUsually off

EmissionsNot relevant

Drive cycleNot required

Limp modeNo

U0234 states that the convenience recall module has fallen silent on the network. Convenience recall means stored personal settings brought back on request or by key, typically seat, outside mirror, pedal and column positions and audio presets; patent US7525931B2 shows such a recall session started by a networked door module message. No manufacturer documents U0234 publicly, and many brands place this job in seat or door modules that carry their own codes, such as U0208 for a memory seat module, so the unit behind the code must be taken from the maker's data. GM's general logic applies: periodic status message missing while supply is 9-16 V. U0535 covers invalid data. Memory buttons stop working; driving is unaffected, no MIL expected.

Likely causes

Module without power or ground (fuse, connector under seat or door)

Harness under the seat pinched by seat travel

Convenience recall module faulty

Symptoms

Memory buttons for seat and mirrors without function
Driver profile not recalled with the key

Repair estimate

DifficultyMediumDIY possible

Parts and labour€30–600

Time0.5–2.5 h

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

Parts involved

convenience modulecan bus

Related codes

U0535 U0208

References: patents.google.com, saabwisonline.com.