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2016 LINCOLN MKT
3.7L V6•FWD•AUTOMATIC•gas
3 active safety recalls on this vehicle — view recalls
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Repairs0Labor486Torque3114Fluid7DTC1898Battery1Maintenance0Recalls3
P0458low severityPowertrain

Evaporative Emission System Vent Valve Control Circuit Low

on 2016 Lincoln MKT 3.7L V6 · FWD

What this code means

The PCM detected low voltage in the EVAP purge or vent valve control circuit. This is often a wiring short to ground or a failed valve.

Symptoms

  • Check engine light on
  • Possible rough idle
  • Failed emissions test

Common causes

  • Short to ground in control circuit
  • Faulty EVAP purge/vent valve
  • Corroded connector
  • Open PCM driver circuit

Diagnostic steps

  1. Inspect valve connector and wiring
  2. Measure valve resistance against spec
  3. Check control circuit for short to ground
  4. Replace valve if out of spec
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