LBT-347 Top EPA Trouble Codes


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presented by John Forro

Every quarter of every year, the EPA releases a list of the top trouble codes regarding emission related issues. Instructor John Forro discusses the most recent list of codes, and the possible fixes for them. A great class for all technicians and critical for technicians with state mandated emissions tests.

Trouble Codes Covered Include:

  • PO420: Bank 1 Catalyst Below Threshold
  • PO171: Bank 1 Too Lean
  • PO455: Gross EVAP Leak
  • PO442: Small EVAP Leak
  • PO440: EVAP Malfunction
  • PO141: Bank 1 Sensor 2 O2 Sensor Heater Circuit Malfunction
  • PO128: Coolant Thermostat Out Of Range
  • PO174: Bank 2 System Lean

Runtime: 12 mins

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