P0442 on Kia: How to Diagnose & Fix
Evaporative Emission Control System Leak Detected (Small Leak)
2 Kia models · 4 documented issues · $30-$1,500 repair
P0442 on Kia by model: symptoms, diagnosis and fix
The Rio air conditioning compressor fails prematurely, typically between 60,000-100,000 miles. The compressor clutch bearing fails first, causing a squealing noise, followed by complete compressor seizure. When the compressor fails, it can send metal debris throughout the A/C system, contaminating the condenser, expansion valve, and evaporator, making the repair more extensive.
Common Symptoms
- A/C blows warm air
- Squealing noise from engine bay when A/C is on
- A/C clutch not engaging
- Grinding noise from compressor area
- A/C works intermittently before failing completely
How to Fix
Replace A/C compressor, receiver/drier, and expansion valve as a minimum. If compressor sent metal debris into the system, the condenser must also be replaced and the entire system flushed. OEM compressor: $400-600. Quality aftermarket (Denso #471-6047): $250-400. Complete system repair with flush: $800-1,500. Always replace the receiver/drier when replacing the compressor.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Genuine Kia 97701-1R100 A/C compressor assemblyOEMKia 97701-1R100
Replace a diagnosed failed compressor on the 2012-2015 OEM branch Fitment/availability: 2012-2015 U.S.-market Kia Rio 1.6L Gamma sedan or hatchback; confirm VIN, HVAC controls, original compressor label and supersession 97701-1R100DR.
- Genuine Kia 97701-1W600 A/C compressor assemblyOEMKia 97701-1W600
Replace a diagnosed failed compressor on the 2016-2017 OEM branch Fitment/availability: 2016-2017 U.S.-market Kia Rio 1.6L Gamma sedan or hatchback; confirm VIN, HVAC controls and original compressor label.
- Genuine Kia 97701-H9200 A/C compressor assemblyOEMKia 97701-H9200
Replace a diagnosed failed compressor on the 2018 Gamma-II OEM branch Fitment/availability: 2018 U.S.-market Kia Rio 1.6L Gamma-II sedan or hatchback; confirm VIN, refrigerant/HVAC configuration and original compressor label because anot…
- Four Seasons 8414NK complete A/C compressor installation kitOEMFour Seasons 8414NK
Install compressor, filter-drier, expansion valve, oil and seals on a matched 2013-2017 DVE12 branch when the condenser does not require replacement Fitment/availability: 2013-2017 Kia Rio 1.6L four-cylinder with DVE12 compressor; confir…
- BuyAutoParts 61-98140R6 five-piece A/C kit with condenser/drierOEMBuyAutoParts 61-98140R6
Replace the compressor, condenser/drier, expansion device, oil and seals on the 2018 contamination branch Fitment/availability: 2018 U.S.-market Kia Rio all models according to the live fitment page; confirm VIN, original compressor labe…
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Owner tips & cautions
- WarningIf the compressor seized, the entire system must be flushed and the condenser replaced. Skipping this step means the new compressor will fail quickly from debris contamination
A recurring complaint on aging Rio models is persistent EVAP leak codes caused by cracked vapor hoses, purge valve issues, canister vent faults, or corrosion around the filler neck area. Owners often notice a check engine light with no drivability problem, but repeated inspection failures and fuel odor can result. This is especially common on older, high-mileage cars exposed to heat and road salt.
Common Symptoms
- check engine light
- fuel smell
- failed emissions test
- no drivability symptoms
- intermittent EVAP codes
How to Fix
Smoke-test the EVAP system rather than guessing at parts. Inspect the gas cap seal first, then check purge and vent solenoids, vapor lines near the charcoal canister, and the filler neck for rust perforation or loose hose connections. Replace damaged hoses or valves and clear codes after confirming the system holds pressure.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Genuine Kia 28910-22040 purge-control valveOEMKia 28910-22040
Confirm engine and VIN.
- Genuine Kia 0K30E-18740 purge-solenoid valveOEMKia 0K30E-18740
Replace a purge solenoid proven faulty on the early 1.5L branch Fitment/availability: 2001-2005 Kia Rio 1.5L branch; confirm engine, connector, hose routing and VIN because the same catalog also lists a separate 1.6L purge valve.
- Genuine Kia 28910-26900 vapor-canister purge valveOEMKia 28910-26900
Replace a purge valve that fails sealing, flow or electrical tests on the later 1.6L branch Fitment/availability: 2005-2011 Kia Rio/Rio5 1.6L Alpha DOHC high-grade/new-body branch; confirm production date and VIN at the 2005 transition.
- Genuine Kia 31430-29200 canister-close valveOEMKia 31430-29200
Replace a canister-close valve that fails bidirectional command, sealing or circuit tests Fitment/availability: 2005-2011 Kia Rio/Rio5 1.6L high-grade/new-body branch; confirm VIN and installed canister/connector. This is not the engine-…
- Genuine Kia 31010-3L500U fuel filler capOEMKia 31010-3L500U
Confirm VIN because earlier 2001-2005 caps vary by option/market.
- Genuine Kia 31040-1E550 fuel filler-neck assemblyOEMKia 31040-1E550
Replace a filler neck proven perforated or leaking during smoke testing Fitment/availability: Kia Rio/Rio5 1.6L produced July 2008-June 2011 on the Federal, California or Euro-3 catalog branch; confirm production date, emissions label, b…
As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.
Owner tips & cautions
- TipIn rust-prone areas, inspect the filler neck and clamps while the rear wheel liner is removed.
P0455 is a large/gross EVAP leak on the Sorento — a much bigger opening than P0442. On the 2012-2015 XM Sorento the most common cause is again a loose or faulty gas cap, but when the cap checks out the two prime suspects are the Purge Control Solenoid Valve (PCSV) in the engine bay and the Canister Close Valve (CCV) mounted under the vehicle near the charcoal canister. A classic Sorento tell for a bad PCSV is hard starting immediately after refueling (raw vapor flooding the intake). Kia has issued TSBs for the XM Sorento touching the purge solenoid on the 2.4L and the fuel Fill-Level Limit Valve.
Common Symptoms
- check engine light on
- hard start right after refueling
- faint fuel vapor smell
- slightly reduced fuel economy
- failed emissions test
How to Fix
Verify the gas cap is tight and its seal intact; replace with OEM if worn. If unresolved, smoke-test the system and inspect the Purge Control Solenoid Valve and the Canister Close Valve, plus large-diameter EVAP hoses and the fill-neck/limit valve. Replace the failed component. Driving with P0455 will not strand you or damage the engine but will fail emissions.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Genuine Kia 31010-3L600U fuel-filler capOEMKia 31010-3L600U
Replace a cap proven unable to seal Fitment/availability: Supersedes the broad 2009-2020 Sorento 31010-3L600 branch; use here primarily for 2011-2018 and confirm VIN.
- Genuine Kia 31010-3L500U fuel-filler capOEMKia 31010-3L500U
Replace a proven faulty late-branch cap Fitment/availability: 2019-2020 Kia Sorento catalog branch; confirm VIN against the parallel 3L600U application.
- Genuine Kia 28910-25100 purge-control valveOEMKia 28910-25100
Replace an early 2.4L purge valve proven to leak or fail actuation Fitment/availability: 2009-2014 Kia Sorento 2.4L Theta-II; confirm VIN and installed number.
- Genuine Kia 28900-2GGA2 purge-control valve assemblyOEMKia 28900-2GGA2
Replace a later 2.4L purge valve proven faulty Fitment/availability: 2015-2018 Kia Sorento 2.4L Theta-II; confirm VIN and installed number.
- Genuine Kia 28910-3L135 purge-control valveOEMKia 28910-3L135
Replace a late V6 purge valve proven faulty Fitment/availability: 2019-2020 Kia Sorento 3.3L seven-passenger branch; confirm VIN.
- Genuine Kia 28910-3C200 purge-control valveOEMKia 28910-3C200
Replace a purge valve proven faulty on a VIN-matched parallel engine branch Fitment/availability: Cataloged across multiple 2009-2020 Sorento engines with overlapping numbers; order only after VIN and installed-number confirmation.
- Genuine Kia 31430-0W000 canister-close valveOEMKia 31430-0W000
Replace the canister-close valve only when sealing or actuation testing identifies it Fitment/availability: 2009-2014 Kia Sorento 2.4L/3.3L/3.5L catalog branch; verify VIN, production and installed number before purchase.
As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.
Sources for this issue (3)
P0442 signals a small evaporative-emissions leak on the Sorento. The single most common cause is a loose, worn, or poorly-sealing fuel (gas) cap. The next most common Sorento-specific culprit is the vapor canister Purge Control Solenoid Valve (PCSV), which lets fuel vapor pass from the charcoal canister into the intake; when it sticks or leaks it sets a small-leak code. Cracked or brittle EVAP hoses and a cracked charcoal canister round out the causes (canister cracking is a documented failure on related Kia platforms, especially in salt-belt states). Because P0442 only reports that a leak exists — not where — a smoke test is the reliable way to pinpoint it.
Common Symptoms
- check engine light on
- no drivability change
- possible faint fuel odor
- failed emissions test
How to Fix
Start with the cheapest fix: inspect the gas-cap seal and re-seat or replace with an OEM cap, then clear the code and drive to see if it returns. If it comes back, smoke-test the EVAP system and inspect/replace the Purge Control Solenoid Valve, cracked hoses, or the charcoal canister as indicated.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Genuine Kia 31010-3L600U fuel-filler capOEMKia 31010-3L600U
Replace a cap whose seal, ratchet or pressure test proves faulty Fitment/availability: Supersedes 31010-3L600 used in the broad 2009-2020 Sorento catalog; use here primarily for the 2011-2018 branch and confirm VIN because 2019-2020 also…
- Genuine Kia 31010-3L500U fuel-filler capOEMKia 31010-3L500U
Replace a proven faulty cap on the later catalog branch Fitment/availability: 2019-2020 Kia Sorento catalog branch across listed engines; confirm VIN against the parallel 3L600U branch.
- Genuine Kia 28910-25100 purge-control valveOEMKia 28910-25100
Replace a purge valve proven not to seal or actuate Fitment/availability: 2009-2014 Kia Sorento 2.4L Theta-II branch; confirm VIN and installed number.
- Genuine Kia 28900-2GGA2 purge-control valve assemblyOEMKia 28900-2GGA2
Replace a purge valve proven faulty on the later 2.4L branch Fitment/availability: 2015-2018 Kia Sorento 2.4L Theta-II; confirm VIN and installed number.
- Genuine Kia 28910-3L135 purge-control valveOEMKia 28910-3L135
Replace a purge valve proven faulty on the late V6 branch Fitment/availability: 2019-2020 Kia Sorento 3.3L seven-passenger branch; confirm VIN.
- Genuine Kia 28910-3C200 purge-control valveOEMKia 28910-3C200
Replace a purge valve proven faulty on a VIN-matched V6/turbo or parallel catalog branch Fitment/availability: Cataloged across 2009-2020 Sorento 2.0L, 2.4L, 3.3L and 3.5L applications, but overlapping numbers exist; order only after VIN…
As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.
Sources for this issue (3)
P0442 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P0442 mean on a Kia?
P0442 stands for "Evaporative Emission Control System Leak Detected (Small Leak)." This emissions code means the evaporative emission (EVAP) control system has detected a small leak. The EVAP system seals the fuel tank and captures gasoline vapors, routing them to be burned in the engine instead of escaping into the air, and the computer periodically pressure- or vacuum-tests the system to confirm it's sealed. A small leak the size of about a 0.040-inch hole will set this code. By far the most common and cheapest cause is a loose, damaged, or missing gas cap, so that's the first thing to check, though any cracked hose or worn seal in the system can also trigger it. On Kia it is documented across 2 models: Rio, Sorento.
What are the most common causes of P0442?
The most common causes of P0442 are: Loose, damaged, or missing fuel filler cap, Worn or cracked gas cap seal, Cracked or disconnected EVAP hose or line, Faulty purge valve or vent valve, Damaged O-ring or seal at the fuel tank or filler neck, Small crack in the charcoal canister, Leaking fuel tank sending unit gasket. The specific cause varies by vehicle.
How much does it cost to fix P0442 on a Kia?
Published repair estimates on Kia range from $30 to $1,500 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
Looking for P0442 on a different make?
View P0442 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.