Back to 2019 Lexus ES 250 AWD

2019 LEXUS ES 250 AWD

2.5L I4FWDAUTOMATICgas
Repairs0Labor593Torque3690Fluid6DTC940Battery0Maintenance0Recalls0
C0340high severityChassis

Active Roll Control System Malfunction

on 2019 Lexus ES 250 AWD 2.5L I4 · FWD

What this code means

General fault in the active roll stabilization system that reduces body roll during cornering.

Symptoms

  • Active roll control warning light
  • Increased body roll in corners
  • Stabilizer bar clunking noise
  • Handling reduced

Common causes

  • Active stabilizer bar motor failure
  • Hydraulic valve fault
  • Control module malfunction
  • Stabilizer bar link failure

Diagnostic steps

  1. Scan for specific sub-codes
  2. Test active stabilizer motor or hydraulic valve
  3. Inspect stabilizer bar links
  4. Check module power supply
  5. Monitor system pressure if hydraulic

Repair notes

Diagnose specific active roll control component. System may be hydraulic or electromechanical.

Other Chassis codes on this vehicle

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