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U0132 Lost Communication With Suspension Control Module A

Check engine lightOn
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

U0132 is set when a module stops receiving suspension control module A, the controller for air springs, ride height or damping. GM names the K5 automatic level control module of 2021 Escalade, Tahoe, Suburban and Yukon with air suspension: it goes silent, a leveling or headlamp service message comes up, and removing two fuses for a few minutes revives it (PIT5795). GM's 2025 EBCM flags missing level-control frames after 250 ms as Type C without MIL. FCA links U0132 on Ram 2500/3500 with rear auto-level air suspension to ASCM software and a lit MIL (TSB 08-175-21). Audi Q5/Q7 and Bentley store U013200 in the gateway, cured by a J775 update or a fuse reset. Module B is U0139. Leveling may stop.

Likely causes

Suspension module locked up, recovers after a power cycle (GM PIT5795, Bentley)
Suspension module software, fixed by an update (FCA Ram, Audi J775)
Fuse, supply or CAN wiring of the suspension module faulty
Suspension control module internally failed

Symptoms

  • Air suspension or leveling warning in the cluster
  • Ride height control or headlamp leveling inoperative
  • MIL on some vehicles (e.g. Ram heavy duty)

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€40–2,500
Time0.3–4 h

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

Parts involved

suspension control module acan bus wiring

Related codes

U0421U0321U0139U0133

References: static.nhtsa.gov, gsi.ext.gm.com, static.nhtsa.gov, static.nhtsa.gov.