P0443 on 2013-2016 Chevrolet Malibu: EVAP Purge Valve Circuit Fixes

What's Unique About the 2013-2016 Chevrolet Malibu

The 2013-2016 Malibu spans two different generations, and the EVAP purge valve is a known high-failure part on both. The 2013-2015 models are the 8th generation, while the 2016 model year introduced the 9th generation. While the part is a common failure on both, its location, appearance, and part number differ. On the 8th gen (2.5L engine), the valve is on the top of the engine near the oil cap. On the 9th gen (2016+) with the 1.5L engine, the purge valve is located on the back side of the engine near the intake manifold and is a particularly frequent cause of the similar P0496 code, often leading to hard starting after refueling.

Generation note: The 2013-2015 models belong to the 8th generation of the Malibu. The 2016 model year marked the start of the 9th generation. The EVAP purge solenoid is a common failure on both, but the specific part and its location on the engine are different. It's crucial to buy the correct part for your specific model year and engine (e.g., 2.5L, 2.0L Turbo, or 1.5L Turbo).

Symptoms You May Notice

• Check Engine Light is on
• Rough idle, sometimes with fluctuating RPMs
• Slightly reduced fuel economy
• Difficulty starting the engine, especially after filling the gas tank (more common with the related P0496 code)
• Strong fuel odor near the vehicle
• Engine stalling in some cases
• "Reduced Propulsion" or "Engine Offline" messages on the driver information center (as reported in NHTSA ODI #11632222 and #11448862)

Most Likely Causes

1. Failed EVAP Purge Solenoid Valve 🔴 High Probability → Shop Vapor Canister This component is a very common failure item across many GM models of this era. The internal solenoid coil can fail electrically (open or short circuit), or the valve can become mechanically stuck open or closed. Manufacturer TSB Bulletin #PIP5552 notes that engineering has investigated conditions where P0443 sets due to component concerns.
   How to confirm: With the engine off, remove the valve and try to blow through it; it should be closed and allow no air to pass. You can also test the coil's resistance with a multimeter, which should typically be between 15 and 30 ohms. A scan tool can command the valve to open and close to check for an audible click and proper operation.
   Typical fix: Replace the EVAP purge solenoid valve. This is a straightforward repair that involves disconnecting one electrical connector and two hoses.
   Est. part cost: $25-$60
2. Wiring or Connector Issue 🟡 Medium Probability Engine bay heat and vibration can cause wires to become brittle, chafe against other components, or connectors to loosen or corrode over time. Rodent damage to wiring is also a possibility. TSB Bulletin #PIT5336 specifically instructs technicians to inspect and repair damaged wires on the engine harness to resolve this code.
   How to confirm: Visually inspect the wiring harness and connector going to the purge solenoid for any signs of damage, corrosion, or loose pins. Wiggle the connector while the engine is running to see if it affects the idle. Use a multimeter to check for 12V power on one wire and a ground signal from the PCM on the other with the key on.
   Typical fix: Repair the damaged section of wire or clean/replace the electrical connector pigtail. A common pigtail connector is Standard Motor Products #S2860.
   Est. part cost: $5-$25
3. Blown Fuse ⚪ Low Probability
   How to confirm: Check the vehicle's fuse box diagram for the fuse related to the emissions system. On some GM vehicles, this may be labeled 'EMISSIONS 1' or similar in the underhood fuse block. Visually inspect the fuse or test it for continuity with a multimeter. TSB Bulletin #PIT5336 notes that technicians may find the Emission 1 Fuse is open when P0443 is present.
   Typical fix: Replace the blown fuse. If the fuse blows again, it indicates a short circuit in the wiring or the purge solenoid itself that must 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. The PCM's internal driver circuit for the valve can fail. This should only be considered after all other possibilities, including the valve and its entire circuit, have been thoroughly tested and ruled out.

Diagnosis Steps

1. Scan the vehicle for trouble codes to confirm P0443 is present and check for any other related codes.
2. Locate the EVAP purge solenoid valve. On the 2013-2015 models (2.5L), it's on the top of the engine, mounted to the intake manifold. On the 2016 1.5L, it's on the back side of the engine near the intake manifold, below the engine cover.
3. Inspect the electrical connector and wiring harness for any visible damage, corrosion, or loose connections. Pay close attention to where the harness might rub against other components.
4. With the ignition on and engine off, use a multimeter to verify that one pin on the connector has 12-volt power.
5. Check the other pin for a ground signal from the PCM. You can use a scan tool to command the purge valve on and off (duty cycle to 50%), watching for the ground signal to cycle or listening for a clicking sound from the valve.
6. If power and ground are good, the issue is likely the purge valve itself. Remove the valve from the vehicle.
7. Attempt to blow through the valve. It should be normally closed, so no air should pass. If air passes, the valve is stuck open and needs replacement.
8. Test the resistance of the solenoid's coil with a multimeter. A good GM valve typically has a resistance between 15-30 Ohms. An open circuit (infinite resistance) or a short (near zero resistance) indicates a failed coil.
9. If the valve and wiring test good, check the associated fuse (e.g., 'EMISSIONS 1') in the underhood fuse block.
10. If all other components check out, the problem could be a rare failure in the PCM driver circuit.

Parts You'll Likely Need

• Vapor Canister Purge Solenoid Valve (OEM #ACDelco 12690512 (supercedes 12632174, 55573017). Verify by VIN.) — This is the most common failure point for a P0443 code on this vehicle. The internal solenoid fails electrically or gets stuck.
  Trusted brands: ACDelco (GM Genuine), Standard Motor Products (CP870), Dorman (911-734), Delphi
  OEM price range: $40-$70
  Aftermarket price range: $25-$50

Related Codes That Often Appear With This One

• P0496 — This code means 'EVAP Flow During a Non-Purge Condition' and is often caused by the same purge valve being stuck open. It's very common to see this code on the 2016+ Malibu with a failed purge valve.
• P0444 — Indicates the purge control valve circuit is open, which could be a broken wire or a failed (open) solenoid coil.
• P0445 — Indicates the purge control valve circuit is shorted, pointing to a wiring issue or an internal failure in the solenoid.

Technical Service Bulletins (TSBs) & Recalls

• While no specific TSB for the Malibu and P0443 was found, TSB #PIT5336 for the related Chevy Traverse mentions checking the 'Emission 1' fuse and inspecting the engine wiring harness for chafing, which are relevant diagnostic steps for the Malibu as well.
• Bulletin #PIP5552 (applicable to other GM models like the Camaro) indicates that engineering has investigated P0443 settings as a known concern.

Platform-Specific Known Issues

• High Failure Rate Across GM Lineup: The EVAP purge valve is a known high-failure rate item across many GM models of this era that share engines with the Malibu, including the Chevy Cruze, Sonic, Trax, and Buick Encore.
• 2016+ 1.5L Engine Location & Symptoms: For the 2016 model with the 1.5L engine, the purge valve is somewhat hidden on the rear of the engine. A failure here often presents with a P0496 code and causes difficulty starting after refueling.
• Wiring Harness Chafing: In some cases, the wiring harness leading to the purge valve can rub against other engine components, causing a short or open circuit and triggering the P0443 code. A thorough visual inspection is recommended before replacing parts.

Mechanic-Grade Diagnostic Values

• EVAP Purge Solenoid Coil Resistance — expected: 15 to 40 Ohms. Some sources cite a tighter range of 22-38 Ohms.. Failure: A reading of infinite resistance (Open Loop) or near-zero resistance (short circuit) indicates a failed solenoid coil.
• Voltage at Purge Solenoid Connector (Key On, Engine Off) — expected: Pin A (or the ignition circuit wire, often Pink/Black) should have battery voltage (approx. 12V) to ground.. Failure: No voltage indicates an open in the power supply circuit or a blown fuse. Significantly lower voltage suggests high resistance in the circuit.
• Ground Signal at Purge Solenoid Connector — expected: Pin B (the control circuit wire) is ground-side switched by the ECM. Using a scan tool to command the purge valve to 50% duty cycle should show the ground signal pulsing. A test light connected between Pin A and Pin B should flash or illuminate dimly as the ECM commands the valve.. Failure: A test light that is always on indicates a short to ground in the control circuit. A test light that is always off indicates an open/high resistance in the control circuit or a faulty ECM driver.

Scan Tool Commands That Help

• GDS2 / Tech2 (or equivalent professional scan tool): EVAP Purge Solenoid Output Control — This bidirectional command allows a technician to manually command the purge solenoid to open at various percentages (e.g., 0%, 25%, 50%). This is used to verify if the solenoid clicks audibly, if the ECM driver is functioning, and to check for vacuum flow through the valve when commanded open.
• GDS2 / Tech2 (or equivalent professional scan tool): Read Freeze Frame Data — When the P0443 code is set, the ECM stores a snapshot of engine conditions (engine speed, load, temperature, etc.) at the moment of the fault. This data can help a technician understand the context of the failure (e.g., did it happen on a cold start, at highway speed, etc.).

Wiring & Ground Locations

• Purge Solenoid Connector Pinout — The 2-pin connector on the EVAP purge solenoid valve itself.. Testing for power and ground control requires knowing which pin is which. Pin A is typically the 12V ignition supply (often a Pink/Black wire), and Pin B is the control circuit that the ECM pulses to ground (often a Green wire). Verifying power on Pin A and a command signal on Pin B is the primary electrical test.
• G101 / G102 — On or near the lower left side of the engine block or left front of the engine compartment.. These are primary engine and ECM ground points. While not directly for the purge valve, a poor main ground at G101 can cause a host of erratic electrical issues and codes, including problems with ECM-controlled components like the purge solenoid. Ensuring these grounds are clean and tight is a good practice when diagnosing any ECM-related circuit code.
• G103 — Located on the cowl in the left rear of the engine compartment, often above the brake booster.. This ground point serves the Body Control Module (BCM) and Data Link Connector (DLC). While not a direct cause for P0443, a problem here can affect communication and overall vehicle electronics, so it's a key location to be aware of for general electrical diagnostics.
• Underhood Fuse Block — Typically located on the driver's side of the engine bay, near the battery.. The 12V power supply for the purge solenoid originates from a fuse in this block. The fuse may be labeled 'EMISSIONS', 'EMI', or be shared with other components. A blown fuse will cause a P0443 by cutting power to the circuit.

Real Owner Repair Stories

• YouTube - Pine Hollow Auto Diagnostics (2011 Chevrolet Malibu LTZ V6) — Check Engine Light with code P0443.
  ❌ Tried (didn't work) The technician immediately suspected the common failure of the purge solenoid itself.
  ✅ What actually fixed it The technician tested the circuit and found no 12V power at the solenoid connector. He traced it back to a blown 15A 'EMI 1' fuse in the underhood fuse block. Replacing the fuse restored power. The underlying cause of the blown fuse was suspected to be a previous short in the old, now-replaced purge solenoid, but the immediate fix was replacing the fuse after the part was replaced.
• NHTSA ODI #11632222 — An owner reported a Check Engine Light and "Reduced Propulsion" message. A technician found the P0443 code along with several others and discovered a blown fuse [F03], likely caused by a sticking EGR valve.
• NHTSA ODI #11448862 — A vehicle owner experienced a "message on the console says engine offline" with a long list of error codes including P0443, P0031, and P0597, despite the car having very low gas mileage usage.
• NHTSA ODI #11681144 — An owner reported a failure to circulate coolant properly accompanied by a list of CEL codes including P0443, P06DB, and P0597, noting this is a known issue for the platform.

OEM Part Supersession History

• 55573017, 12632174 → 12690512 — Standard part evolution and consolidation by GM/ACDelco. The newer part number is the current recommended replacement for a wide range of GM vehicles.
  Heads up: The part 12690512 is the correct OE replacement for many 2013-2016 Malibu applications, but it is critical to verify fitment by VIN as different engines and model years can use different physical designs.

Model Year Variations Within This Range

• 2013-2015 (Gen 8): The EVAP purge valve is typically located on top of the engine near the oil cap, making it very accessible.
• 2016 (Gen 9): The purge valve on the 1.5L Turbo engine is located on the back side of the engine near the intake manifold. It is a more frequent cause of the related P0496 code on this generation and can be slightly more difficult to access than the Gen 8 version.

Diagnostic Flowchart

Used vs. New Parts: Buying Guide for This Vehicle

When a used part is the smart pick: Because the new aftermarket part is very inexpensive (often $25-$50) and this specific part has a high failure rate, buying a used one from a junkyard is not recommended. The risk of the used part failing soon after installation is high, making the small cost savings impractical.

OEM-only on this vehicle (don't cheap out):

• While not strictly 'OEM-only', using the GM Genuine part (ACDelco) is highly recommended for fitment and reliability. The cost difference between OEM and quality aftermarket is often minimal for this part.

Aftermarket brands forum-validated for this vehicle:

• ACDelco (GM Original Equipment)
• Standard Motor Products (SMP)
• Delphi

Brands owners have reported issues with on this vehicle:

• Unbranded, 'white-box' parts from online marketplaces should be avoided. While Dorman is a major brand, some professional technicians and forum users have reported mixed results with their electronic components compared to SMP or ACDelco.

Real Owner Stories

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

Related OBD-II Codes

• P0496 — Indicates 'EVAP Flow During a Non-Purge Condition.' This code is frequently seen with P0443 because a common failure is the purge valve becoming mechanically stuck open, which causes improper flow (P0496) while the circuit fault (P0443) may also be detected.
• P0444 — Indicates 'EVAP Purge Control Valve Circuit Open.' This is a more specific version of P0443, pointing directly to an open circuit caused by a broken wire, loose connector pin, or a failed-open internal solenoid coil.
• P0445 — Indicates 'EVAP Purge Control Valve Circuit Shorted.' This is the companion to P0444 and points to a short circuit in the wiring or the solenoid coil itself. A short circuit will often cause the related 'EMISSIONS 1' fuse to blow.
• P0031 — Oxygen Sensor Heater Control Circuit Low. This code can appear with P0443 if a shared power fuse (like the 'EMISSIONS 1' fuse) is blown due to a short in any of the connected components, including the O2 sensor heater or the purge valve.
• P0597 — Thermostat Heater Control Circuit Open. Similar to other codes on the same circuit, this can be triggered alongside P0443 if they share a common fuse that has blown due to a short circuit in one of the components.

Frequently Asked Questions