P029B OBD II Trouble Code Cylinder 1 Fuel Trim at Min Limit

How to quickly diagnose, repair, and info on symptoms and causes of a P029B code that indicates the fuel trim is at it's minimum limit on cylinder number 1.

Symptoms of P029B OBD II Trouble Code

  • Diminished engine performance
  • Reduced fuel efficiency
  • Delayed engine startup
  • The presence of stored rich exhaust codes
  • Misfire codes may also be stored

Common Causes of P029B OBD II Trouble Code

  • Defective fuel injector
  • Bad fuel pressure regulator
  • Faulty oxygen sensor
  • Mass air flow (MAF) or Manifold Air Pressure (MAP) sensor failure

Severity of P029B OBD II Trouble Code

The P029B should be classified as severe because a rich fuel condition may lead to numerous drivability issues and catalytic converter damage.