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DTC codes / Mitsubishi codes / P1443

P1443 · MitsubishiEVAP Purge Control Solenoid 2 Circuit Fault

P1443 on a Mitsubishi means the engine computer has detected an electrical fault in the circuit for the second evaporative emission (EVAP) purge control solenoid, which is the valve that meters fuel vapor from the charcoal canister into the intake. The computer monitors the solenoid's command wire for expected voltage or current behavior and flags the code when the circuit is open, shorted to ground, or shorted to power.

SystemPowertrain
Code typeMitsubishi specific
SeverityLow
Fix difficultyIntermediate
AreaAuxiliary emission controls

Symptoms you may notice

  • Illuminated check engine light, often with no other symptoms besides the warning light
  • A faint fuel vapor smell around the engine bay or near the charcoal canister after parking
  • Rough idle or a slight stumble at idle if the solenoid sticks open and admits unmetered vapor
  • Slightly elevated fuel consumption in some cases because purge timing is disabled
  • Failed emissions inspection due to the stored code and incomplete EVAP monitor
  • In rare cases, a hard start after refueling if the canister is saturated and purge is inoperative

Common causes, most likely first

  1. Failed purge control solenoid 2, typically an open or shorted internal coil
  2. Damaged, corroded, or disconnected wiring or connector at the solenoid or along the harness
  3. Blown fuse or poor ground shared with the purge solenoid circuit
  4. Faulty engine control module (ECM) driver for the solenoid, though this is uncommon
  5. Contamination or sticking of the solenoid valve from fuel vapor debris or carbon
  6. Harness chafing or rodent damage on the circuit between the ECM and the solenoid

How to diagnose and fix it

  1. Scan all modules and record freeze-frame data to confirm P1443 is active and not a history code from a previous repair
  2. Inspect the purge solenoid 2 connector and harness for corrosion, loose pins, or chafing, and repair as needed
  3. Check the fuse and ground for the purge solenoid circuit with a test light or multimeter
  4. Measure the solenoid coil resistance and compare it to the manufacturer's specification to confirm an open or shorted coil
  5. Command the solenoid on and off with a scan tool and listen for a click while watching for a change in fuel trim or EVAP pressure
  6. If the coil or valve is faulty, replace the purge control solenoid 2 and clear the code
  7. Clear codes, run the EVAP monitor to completion, and verify P1443 does not return

What Mitsubishi techs check before replacing the purge solenoid

  • A P1443 can be set by a simple unplugged connector after service work near the canister or intake, so always check connector seating before condemning the solenoid.
  • On many Mitsubishi models the second purge solenoid shares a power feed or ground with other EVAP components, so a single blown fuse can set P1443 along with other codes.
  • A solenoid that clicks when commanded can still be mechanically stuck open or closed, so electrical tests alone do not rule out a valve fault.
  • The ECM driver failure is rare but possible; if a new solenoid immediately sets P1443 again, check the command wire for a short to ground before replacing the ECM.
  • This code does not always mean the canister is bad, and replacing the charcoal canister without testing the solenoid circuit is a common misdiagnosis.

Can I keep driving with P1443?

The vehicle is safe to drive with P1443 because the fault affects only evaporative emissions and does not impair engine performance, but avoid topping off the fuel tank and have the circuit inspected soon to prevent a raw fuel smell or a failed emissions test.

Tools that help

Tools we recommend are in the Auto Veteran shop on Amazon. As an Amazon Associate we earn from qualifying purchases.

Guidance is general and written for Mitsubishi vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.

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