P219A: How to Diagnose & Fix — Bank 1 Air/Fuel Ratio Imbalance
2 vehicles · 2 makes · $200-$1,200 repair
How to diagnose and fix P219A: most-reported vehicles
Ranked by owner reports. Each card gives the symptoms, how to confirm the cause, the fix, parts and sources for that vehicle.
Honda Pilot · 2016–2019
The PCM software may misinterpret sensor inputs as a deteriorated catalytic converter, and debris from the high-pressure pump or the injector machining process can cause internal wear or clogging inside one or more fuel injectors. P0420/P0430, P0300-P0306 and P219A/P219B may be stored. 2016-2017 Pilot (bulletin 20-100, with software update) and 2017-2019 Pilot (bulletin 21-010, without software update), all trims, eligibility by VIN.
How to Fix
Have a Honda dealer verify the VIN and stored codes against 20-100 (2016–2017 Pilot, with software update) or 21-010 (2017–2019, without that update); the bulletins require at least 5,000 miles. With only P0420/P0430, perform the cylinder air-fuel test and replace the injectors only if it fails; 20-100 also requires its software update. With the specified misfire or air-fuel imbalance codes, follow the injector-replacement branch and any applicable software update. For a 9-speed automatic under 20-100, also confirm its A/T software is current. Use the complete specified fuel-injector kit (06160-RLV-305 in these bulletin versions), including all must-replace parts, rather than only the six injectors pictured. Honda’s extension is 10 years from original purchase or 150,000 miles, whichever comes first, with eligibility confirmed by the dealer. These sources do not direct automatic catalytic-converter replacement. If none of the listed codes is present, continue normal troubleshooting.
Call to confirm they can assess your vehicle and perform the stated work. Search results do not confirm qualification, eligibility or coverage.
Sources for this issue (4)
- Honda Service Bulletin 20-100, Warranty Extension: MIL Comes On with DTC P0420/P0430, P030x, and/or P219A/B (With Software Update) (Version 2, February 11, 2021)tsb
- Honda Service Bulletin 21-010, Warranty Extension: MIL Comes On with DTC P0420/P0430, P030x, and/or P219A/B (Without Software Update) (February 11, 2021)tsb
- Honda owner letter: Warranty Extension (Without Software Update) for 2017-19 Pilot fuel injectorstsb
- Honda dealer notice: Warranty Extension: 2016 Pilot V6 Fuel Injectortsb
Nissan Rogue · 2022–2025
On 2022+ Rogues equipped with the 1.5L KR15DDT variable-compression turbo engine, owners have reported rough idle, gasoline/fuel odor, hesitation, and check-engine lights tied to crankcase ventilation or related air-fuel control issues. These complaints are distinct from outright transmission concerns and appear in owner forums and complaint databases as the newer engine accumulated mileage. In some cases, the issue presents as drivability problems without obvious external leaks.
Common Symptoms
- Check engine light
- Rough idle
- Gasoline/fuel smell in cabin or around vehicle
- Hesitation on acceleration
- Poor fuel economy
- Occasional stumble after startup
How to Fix
Scan for stored engine and fuel-trim faults, inspect the PCV system and hoses for restriction or leakage, and check for intake tract leaks or oil contamination. Depending on findings, repair may involve replacing the PCV-related components, updating ECM calibration if applicable, cleaning fouled intake components, and verifying fuel trims and idle quality after repair.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Genuine Nissan PCV valve 11810-6RC0A
2022-2025 Rogue 1.5L turbo within the product's 2021-2025 fitment; confirm VIN. Not for the 2.5L engine and not a bearing-recall remedy.
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
- TipHave fuel trims and pending codes checked even if the CEL turns off; intermittent PCV or intake faults may leave useful freeze-frame data.
Sources for this issue (2)
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P219A 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 P219A mean?
P219A stands for "Bank 1 Air/Fuel Ratio Imbalance." This code means the engine computer detected an air/fuel ratio imbalance among the cylinders on Bank 1, the bank containing cylinder #1. The computer compares oxygen sensor data with small variations in crankshaft speed to detect when individual cylinders are running noticeably richer or leaner than the others. An imbalance points to one or more cylinders not receiving the correct fuel or air. It can cause rough running, hesitation, and increased emissions, and over time may lead to a misfire if left unaddressed.
What are the most common causes of P219A?
The most common causes of P219A are: Dirty or leaking fuel injector on one cylinder, Vacuum leak affecting specific cylinders, Faulty air/fuel ratio or oxygen sensor, Low or uneven fuel pressure, Intake manifold gasket leak, Carbon-fouled or weak spark on a cylinder, Uneven compression among cylinders. The specific cause varies by vehicle.
How much does it cost to fix P219A?
Repair costs for P219A range from $200 to $1,200, depending on the vehicle and root cause.
Which vehicles are affected by P219A?
Au7o has documented P219A across 2 vehicle models from 2 manufacturers: Honda, Nissan.
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Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.