P219A on Honda: How to Diagnose & Fix
Bank 1 Air/Fuel Ratio Imbalance
1 Honda model · 1 documented issue · 1 critical
P219A on Honda by model: symptoms, diagnosis and fix
2016-2019 Pilots suffer from debris in direct-injection fuel system causing internal wear or clogging inside injectors. Causes misfire codes (P0300-P0306), air-fuel ratio imbalance codes (P219A/B), catalyst efficiency codes (P0420/P0430), rough idle, and stalling. TSB 20-100 addresses this defect on 2016-2017 models. Honda extended warranty to 10 years/150,000 miles for 2016-2017 models (with PCM software update) and extended fuel injector coverage to 10 years/150,000 miles for 2017-2019 models.
Common Symptoms
- Check engine light with misfire codes (P0300-P0306)
- Catalyst efficiency codes (P0420, P0430, P219A, P219B)
- Rough idle or engine stumbling
- Engine stalling at stops
- Poor fuel economy
- Fuel smell at idle
- Loss of power under acceleration
How to Fix
Visit Honda dealer for diagnosis using TSB 20-100. For vehicles with these codes, Honda will replace fuel injectors and catalytic converters under extended warranty (10 years/150,000 miles for 2016-2017; fuel injectors 10 years/150,000 miles for 2017-2019). PCM software update also available. Keep documentation of all misfires and check engine lights to support warranty claim.
Call to confirm they can assess your vehicle and perform the stated work. Search results do not confirm qualification, eligibility or coverage.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Genuine Honda 16010-RLV-315 six-piece fuel-injector setOEMHonda 16010-RLV-315
Retail fallback only after Honda warranty/VIN review and diagnosis confirm the injector branch Fitment/availability: 2016-2018 U.S.
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
- TipHonda extended warranty to 10 years/150,000 miles for 2016-2017 models with these codes - document all issues
- TipIf dealer denies warranty claim, reference TSB 20-100 specifically and escalate to Honda corporate
- WarningDo not ignore misfire codes - continued driving can damage catalytic converters ($1,500-$3,500 to replace)
- WarningThese codes often misdiagnosed as VCM issues - verify with dealer using TSB 20-100 for correct diagnosis
Sources for this issue (3)
- Honda Service Bulletin 20-100 v2: Warranty Extension: MIL Comes On with DTC P0420/P0430, P030x, and/or P219A/B (With Software Update)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
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 on a Honda?
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. On Honda it is documented across 1 model: Pilot.
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 on a Honda?
Repair costs vary widely with the root cause and Honda model; each issue on this page carries its own estimate where one is published.
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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.