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2006 CADILLAC XLR-V
4.4L Supercharged V8•RWD•AUTOMATIC•gas•supercharged
1 active safety recall on this vehicle — view recalls
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Repairs0Labor477Torque660Fluid7DTC1921Battery1Maintenance0Recalls1
P1401moderate severityPowertrain

EGR System Performance

on 2006 Cadillac XLR-V 4.4L Supercharged V8 · RWD

What this code means

The EGR system flow does not meet expected performance. Similar to OBD code P0401, this points to insufficient or excessive EGR flow.

Symptoms

  • Check engine light on
  • Rough idle
  • Pinging or knocking

Common causes

  • Clogged EGR passages
  • Faulty EGR valve
  • Carbon buildup
  • Vacuum or wiring fault

Diagnostic steps

  1. Scan for EGR codes
  2. Command EGR valve with scan tool
  3. Inspect EGR passages for clogging
  4. Check EGR valve operation and wiring
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