P219B on Honda
Bank 2 Air/Fuel Ratio Imbalance
P219B on Honda vehicles indicates bank 2 air/fuel ratio imbalance. Au7o has documented this code across 1 Honda model — most commonly on Pilot. 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.
Common Causes of P219B
- •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
P219B on Honda by Model
Honda Pilot(1 issue)
- Fuel Injector Debris Causing Misfires and Catalyst Codes2016-2018
2016-2018 Pilots suffer from debris in direct-injection fuel system causing internal wear or clogging inside injectors. Causes misfire codes (P0300-P0306), catalyst efficiency codes (P219A/B, P0420/P0430), rough idle, and stalling. TSB 20-100 addresses this defect. Honda extended warranty to 10 years/150,000 miles for 2016-2017 models.
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View P219B across all makes →Frequently Asked Questions
What does P219B mean on Honda?▼
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. On Honda specifically, this code is documented across 1 model.
What causes P219B on Honda vehicles?▼
Common causes on Honda: 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). Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P219B on a Honda?▼
Repair costs vary widely depending on the root cause and specific Honda model.
Which Honda models have P219B documented?▼
Au7o has documented P219B on 1 Honda model: Pilot.