P1420 Catalyst Temperature Sensor Fault

Category
Powertrain - Auxiliary Emissions Controls
Severity
Check Engine Light
Applies to
Ford models with catalyst temperature monitoring

What does P1420 mean on a Ford?

P1420Catalyst Temperature Sensor Fault. This Ford-enhanced code applies to Ford models with catalyst temperature monitoring.

Common causes of P1420

How to fix P1420

  1. Inspect sensor wiring for heat damage
  2. Test sensor resistance
  3. Check circuit continuity
  4. Verify exhaust temperatures are sane
  5. Replace the sensor after circuit checks