P0443 on 2017-2024 Chrysler Pacifica: EVAP Purge Valve Circuit Causes and Fixes

What's Unique About the 2017-2024 Chrysler Pacifica

For the 2017-2024 Chrysler Pacifica, including both the 3.6L V6 and Hybrid models, the P0443 code points to a very common failure item: the purge valve solenoid. The part is used across both powertrain variants, and its location on top of the engine makes it more accessible than in many other vehicles. While the code itself is generic, Pacifica owners frequently resolve it with a straightforward part replacement, often after experiencing stalling immediately after refueling—a classic sign of a purge valve stuck open, flooding the intake with fuel vapors.

Symptoms You May Notice

• Check Engine Light is on.
• Engine stalling or running rough immediately after refueling.
• Slightly reduced fuel economy.
• Rough idle.
• A faint fuel odor near the vehicle.
• Remote start feature is disabled.

Most Likely Causes

1. Failed EVAP Purge Valve/Solenoid 🔴 High Probability → Shop Vapor Canister The solenoid is an electromechanical part that cycles frequently and is a common failure point across many Stellantis vehicles using the 3.6L Pentastar engine. 🎬 Watch: Understanding the P0443 circuit code on Chrysler engines The internal coil can fail, creating an open circuit, or the valve can become mechanically stuck.
   How to confirm: Locate the valve on top of the engine. With the engine off, disconnect the electrical connector and test the two pins on the valve for resistance using a multimeter; a reading between 14 and 30 Ohms is expected. An open circuit (infinite resistance) or a short (near-zero resistance) indicates a failed solenoid. You can also apply 12V directly to the pins to see if it clicks open and closed. A normally closed valve should not allow you to blow air through it when unpowered.
   Typical fix: Replace the EVAP purge valve solenoid. The Mopar part number is 4627694AB. 🎬 See this quick 2018 Pacifica purge valve replacement walkthrough
   Est. part cost: $25-$75
2. Damaged Wiring or Electrical Connector 🟡 Medium Probability Engine bay heat and vibration can cause wires to become brittle or chafe over time. Rodents can also chew through wiring. Work performed elsewhere in the engine bay can sometimes lead to accidentally damaging or disconnecting the harness.
   How to confirm: Visually inspect the wiring harness leading to the purge valve for any signs of cracking, chafing, or breaks. Check the connector for corrosion, bent/spread pins, or a loose fit. Use a test light or multimeter on the connector (with the key on, engine off) to confirm one wire is receiving battery voltage. The other wire is the control wire, which the PCM pulses to ground to activate the solenoid; check it for continuity back to the PCM (should be < 5.0 ohms).
   Typical fix: Repair the damaged section of wire or replace the connector pigtail.
   Est. part cost: $5-$20
3. Blown Fuse ⚪ Low Probability
   How to confirm: Consult the owner's manual or the fuse box diagram to identify the fuse related to the emissions or EVAP system. On some related vehicles, this is fuse F87. Visually inspect the fuse to see if it has blown.
   Typical fix: Replace the blown fuse. If the fuse blows again immediately, it indicates a short circuit in the system that needs to be diagnosed.
   Est. part cost: $1-$5

Rare But Worth Checking

• Faulty Powertrain Control Module (PCM): → Shop Engine Control Module (ECM) This is extremely rare and should only be considered after the purge valve, wiring, and fuses have all been thoroughly tested and confirmed to be good. A faulty PCM driver for the purge circuit would be the specific internal failure.

Diagnosis Steps

1. Read the code with an OBD-II scanner to confirm P0443 is present.
2. Remove the plastic engine cover to access the purge valve, located on the top of the engine.
3. Visually inspect the EVAP purge valve and its electrical connector for any obvious damage, such as cracked plastic, loose connections, or green corrosion.
4. Inspect the wiring harness leading to the valve for any signs of chafing, melting, or rodent damage.
5. Check the fuse for the EVAP/emissions circuit in the vehicle's fuse box (possibly F87). Replace if blown.
6. If the wiring and fuse are okay, disconnect the electrical connector from the purge valve. Use a multimeter to check for battery voltage (~12V) at the power supply pin in the connector with the ignition on.
7. Test the purge valve itself. Measure the resistance between the two pins on the valve. A reading between 14-30 ohms is good. A reading of infinite resistance (open) or near-zero resistance (short) confirms the valve has failed electrically.
8. If the valve's resistance is within spec, you can try applying 12V and ground directly to its pins to listen for an audible 'click'. If it doesn't click, the valve is mechanically stuck.
9. If the valve and wiring test good, the fault may lie with the PCM's driver circuit, but this is very uncommon and professional diagnosis is recommended at this point.

Parts You'll Likely Need

• Vapor Canister Purge Valve / Solenoid (OEM #4627694AB) — This is the most common failure point for code P0443. The internal solenoid coil fails electrically or the valve becomes mechanically stuck.
  Trusted brands: Mopar, Dorman (P/N: 911-410), Standard Motor Products (P/N: CP796), Wells (P/N: 2M1383)
  OEM price range: $50-$90
  Aftermarket price range: $25-$75

Related Codes That Often Appear With This One

• P0441 (Incorrect Purge Flow): Can be triggered if the electrical fault in P0443 causes the valve to be stuck open or closed, leading to the PCM detecting improper vapor flow.
• P0456 (Very Small EVAP Leak): A user on a forum reported that after fixing a P0456 leak, a P0443 code appeared, suggesting that work on the EVAP system can sometimes disturb the purge valve circuit wiring. A failing purge valve can also cause a P0456 code.

Mechanic-Grade Diagnostic Values

• EVAP Purge Valve Solenoid Coil Resistance — expected: 14 to 30 Ohms. Failure: An infinite reading (OL) indicates an open coil; a near-zero reading indicates a shorted coil.
• Purge Valve Connector Power Wire Voltage (Key On, Engine Off) — expected: ~12 Volts (Battery Voltage). Failure: Voltage significantly below 10V suggests a problem in the power supply circuit (fuse, relay, or wiring), not the valve itself.
• Purge Valve Connector Control Wire Voltage (Back-probed, during scan tool active test) — expected: Voltage should pulse, dropping near 0V when commanded ON (grounded by PCM) and returning to battery voltage when OFF.. Failure: Voltage does not change when commanded, is always 0V (short to ground), or is always at battery voltage (open circuit in control wire or faulty PCM driver).
• Control Wire Continuity to PCM — expected: Less than 5.0 Ohms. Failure: A reading higher than 5.0 Ohms or an open circuit (OL) indicates a break in the wire between the solenoid connector and the PCM.

Scan Tool Commands That Help

• wiTECH or equivalent professional scanner: EVAP Purge Solenoid Active Test / Duty Cycle Command — This bidirectional command allows the technician to manually cycle the purge solenoid on and off. It is used to listen for an audible 'click' to confirm mechanical function and to simultaneously test the control circuit's voltage response with a multimeter or test light, verifying the wiring and PCM driver are working.

Wiring & Ground Locations

• EVAP Purge Solenoid Connector — On the purge solenoid itself, located on the top, center-rear of the engine under the plastic cover.. This 2-pin connector is the primary test point. One pin is power, the other is the control ground from the PCM. On related 3.6L engines, wire colors are often Dark Blue/White (power) and Dark Blue/Orange or Dark Blue/Brown (PCM control), though colors should be verified.
• G903A — Right front of the engine compartment.. This is a major engine compartment ground point identified on wiring diagrams for the 3.6L engine family. A poor connection here can cause various electrical issues, and while the purge solenoid is grounded through the PCM, the PCM itself relies on clean chassis and engine grounds to function correctly.

Real Owner Repair Stories

• YouTube video by 'U Can Do It' (2017+ Chrysler Pacifica) — Check Engine Light with code P0456 (Small EVAP Leak).
  ❌ Tried (didn't work) Not specified, but the owner proceeded directly to replacing the purge valve.
  ✅ What actually fixed it Replacing the EVAP Purge Control Valve (Mopar P/N 4627694AB) resolved the check engine light. This is valuable for P0443 because it shows the same part can cause multiple EVAP codes and confirms the part number and replacement procedure on the correct vehicle.
• Carly Community Forum User (2021 Chrysler Pacifica Hybrid) — Persistent Check Engine Light, stalling issues, fuel smell when tank is full, and EVAP system pressure sensor issues.
  ❌ Tried (didn't work) Initial diagnosis was unclear.
  ✅ What actually fixed it Diagnostics at a workshop revealed a completely clogged activated charcoal filter was causing improper ventilation. Replacing the charcoal filter resolved all symptoms. This is a key misdiagnosis scenario, as a purge valve stuck open (a potential cause of P0443) can flood the canister with fuel vapor, eventually clogging it and causing similar stalling symptoms.

OEM Part Supersession History

• 4627694AA → 4627694AB — Standard part revision, likely for improved durability or material changes.

Diagnostic Flowchart

Other Known Issues on This Vehicle

Issues unrelated to this code that are worth knowing about as an owner of this generation:

• Harsh Shifting or Transmission Failure (ZF 9-Speed) 🔴 High — Commonly reported on earlier model years (2017-2020). Can manifest as rough shifting, jerking, hesitation, or complete failure. (Ref: Multiple TSBs exist for software updates to improve shift quality, such as TSB 21-043-20.)
• Premature Engine Mount Failure 🟠 Medium — Relatively common across all model years. The lower torque strut mount ('dogbone') is often the first to fail, causing a 'clunk' on acceleration or when shifting. (Ref: No specific recall, but it is a widely discussed issue in owner forums.)
• Hybrid Transmission Failure (eFlite eCVT) 🔴 High — Affects 2017-2023 Hybrid models. Can lead to sudden loss of power or stalling. (Ref: Covered by recall 03A (NHTSA 23V-010) and an extended warranty (D-23-07 / XE1) for internal wiring or bearing failures.)
• Uconnect Infotainment System Glitches 🟡 Low — Frequently reported by owners. Issues include screen freezing, unresponsiveness, and problems with Bluetooth/Apple CarPlay/Android Auto connectivity. (Ref: Software updates are periodically released by dealers to address bugs.)
• Sudden Engine Stalling (Gas and Hybrid) 🔴 High — Reported across various model years, can be caused by multiple issues including transmission faults or fuel system problems. (Ref: Some stalling issues on hybrid models are addressed by recall 03A (NHTSA 23V-010).)

Used vs. New Parts: Buying Guide for This Vehicle

When a used part is the smart pick: For this specific repair, buying a used purge valve is NOT recommended. It is a low-cost, high-failure electromechanical part. The risk of purchasing a part that is already at or near the end of its service life is very high, offering poor value even if the initial cost is low.

Donor-vehicle mileage cap: roughly under 15000 miles for the part to have meaningful remaining life.

What to inspect on the donor part:

• If forced to buy used, source from the lowest mileage donor vehicle possible.
• Ensure there is no cracking on the plastic housing or hose ports.
• Check that the electrical pins are clean, straight, and free of any corrosion.

Aftermarket brands forum-validated for this vehicle:

• Mopar (OEM) is the safest choice with a proven track record.
• Standard Motor Products (SMP) and Wells are generally considered reliable aftermarket alternatives.

Brands owners have reported issues with on this vehicle:

• Dorman (P/N: 911-410) has a mixed reputation. While some users report it works fine and is identical to OEM, others have experienced premature failure of Dorman EVAP components on other vehicles. It should be considered a budget option with some risk.

Real Owner Stories

Aggregated from forums and TSBs cited above. Mileages and costs reflect what owners reported in those sources.

Related OBD-II Codes

• P0456 — Evap system small leak; often diagnosed alongside P0443 during comprehensive EVAP system inspections.
• P0455 — Evap system large leak; reported by owners in conjunction with P0443 when multiple EVAP components like the purge valve or filler neck fail.
• P0440 — General EVAP system failure; a companion code that may trigger when the purge control circuit (P0443) is malfunctioning.

Frequently Asked Questions