P219A on Honda
Bank 1 Air/Fuel Ratio Imbalance
P219A on Honda vehicles indicates bank 1 air/fuel ratio imbalance. Au7o has documented this code across 1 Honda model — most commonly on Pilot. 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.
Common Causes of P219A
- •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
P219A 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.
Looking for P219A on a different make?
View P219A across all makes →Frequently Asked Questions
What does P219A mean on 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 specifically, this code is documented across 1 model.
What causes P219A on Honda vehicles?▼
Common causes on Honda: 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. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P219A on a Honda?▼
Repair costs vary widely depending on the root cause and specific Honda model.
Which Honda models have P219A documented?▼
Au7o has documented P219A on 1 Honda model: Pilot.