Engine, Cooling and Exhaust: Technical Service Bulletins

• Recalls
  • Recall - PCM Reflash/Inspect/Replace Catalytic Converter
    • Overview
    • Service Procedure
      • A. Reprogram PCM and Inspect Catalytic Converter
      • B. Replace Catalytic Converter If Necessary (XJ, ZJ and AN)
      • C. Replace Catalytic Converter If Necessary (TJ)
      • D. Install the Authorized Modifications Label
      • E. Complete Proof of Correction Form For California Residents
    • Owner Letter
• Customer Interest
  • Exhaust System - Squeak in Cold Weather
  • Exhaust Manifold - Outer Studs Breaking
  • PCM - Light Spark Knock Condition
    • Overview
    • Repair Procedure
  • Headlamps - Momentarily Flicker
    • Overview
    • Repair Procedure
• By Symptom
  • Abnormal wear/deterioration
    • Exhaust Manifold - Outer Studs Breaking
  • Customer Interest
    • Exhaust System - Squeak in Cold Weather
    • Exhaust Manifold - Outer Studs Breaking
    • PCM - Light Spark Knock Condition
      • Overview
      • Repair Procedure
    • Headlamps - Momentarily Flicker
      • Overview
      • Repair Procedure
  • Driveability
    • PCM - Light Spark Knock Condition
      • Overview
      • Repair Procedure
  • Erratic Operation
    • Headlamps - Momentarily Flicker
      • Overview
      • Repair Procedure
  • Noise
    • Exhaust System - Squeak in Cold Weather
  • Poor performance
    • Engine - High Driveability Index Fuels
  • Recalls
    • Recall - PCM Reflash/Inspect/Replace Catalytic Converter
      • Overview
      • Service Procedure
        • A. Reprogram PCM and Inspect Catalytic Converter
        • B. Replace Catalytic Converter If Necessary (XJ, ZJ and AN)
        • C. Replace Catalytic Converter If Necessary (TJ)
        • D. Install the Authorized Modifications Label
        • E. Complete Proof of Correction Form For California Residents
      • Owner Letter
• All Technical Service Bulletins
  • Exhaust System - Squeak in Cold Weather
  • Exhaust Manifold - Outer Studs Breaking
  • PCM - Light Spark Knock Condition
    • Overview
    • Repair Procedure
  • Headlamps - Momentarily Flicker
    • Overview
    • Repair Procedure
  • Engine - Coolant Recommendations
  • Engine - Ticking Noise When Warm
  • Engine - High Driveability Index Fuels
  • Fuel Pressure Gauge Adapter - Usage
  • Recall - PCM Reflash/Inspect/Replace Catalytic Converter
    • Overview
    • Service Procedure
      • A. Reprogram PCM and Inspect Catalytic Converter
      • B. Replace Catalytic Converter If Necessary (XJ, ZJ and AN)
      • C. Replace Catalytic Converter If Necessary (TJ)
      • D. Install the Authorized Modifications Label
      • E. Complete Proof of Correction Form For California Residents
    • Owner Letter