P219B on 2016-2019 Honda Pilot — Bank 2 Air/Fuel Ratio Imbalance
1 vehicles · 1 makes
How to diagnose and fix P219B: most-reported vehicles
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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
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P219B 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 P219B mean?
P219B stands for "Bank 2 Air/Fuel Ratio Imbalance." Generic SAE J2012 code. The PCM continuously compares fuel-trim behavior between cylinder banks. P219B sets when it detects that the air/fuel mixture on Bank 2 (the cylinder bank that does NOT contain cylinder #1 on a V-type engine) is imbalanced relative to Bank 1, meaning the module can no longer balance the mixture equally across both banks. It is an 'imbalance' fault (combustion still occurs) rather than a misfire.
What are the most common causes of P219B?
The most common causes of P219B are: Dirty, clogged, or leaking fuel injector on a Bank 2 cylinder, Intake/vacuum leak local to Bank 2 (manifold gasket, cracked hose), Faulty or lazy upstream oxygen / air-fuel ratio sensor on Bank 2, Contaminated or failing mass airflow (MAF) sensor, Low or inconsistent fuel pressure (weak pump or regulator), Weak ignition coil or fouled spark plug on a Bank 2 cylinder, Low compression / mechanical issue on a Bank 2 cylinder. The specific cause varies by vehicle.
How much does it cost to fix P219B?
Repair costs vary widely depending on the root cause and vehicle.
Which vehicles are affected by P219B?
Au7o has documented P219B across 1 vehicle models from 1 manufacturers: Honda.
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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.