Anyone else????
Thread Starter
Racer
Joined: Jun 2025
Posts: 264
Likes: 204
From: Rochester NY
Anyone else????
So I only have 1057 miles on my car so far. So driving home from work today I noticed that the check engine light came on . Checked the code when I got home and it's P219A Air fuel ratio imbalance bank 1. The car was driving fine and no limp mode. So I did clear the code to see if it comes back. I've also noticed that the my Chevy app want's me to schedule service for the fuel management system ( Probably the P219A CODE) and it also wants me to schedule service for my Transmission. It says "Issue detected" with no reason. I hope this isn't the harbinger of bad news for my car. Any ideas.
Race Director
Joined: Mar 2007
Posts: 11,401
Likes: 8,560
So I only have 1057 miles on my car so far. So driving home from work today I noticed that the check engine light came on . Checked the code when I got home and it's P219A Air fuel ratio imbalance bank 1. The car was driving fine and no limp mode. So I did clear the code to see if it comes back. I've also noticed that the my Chevy app want's me to schedule service for the fuel management system ( Probably the P219A CODE) and it also wants me to schedule service for my Transmission. It says "Issue detected" with no reason. I hope this isn't the harbinger of bad news for my car. Any ideas.
Anyway the actual condition that trigger it, according to the Service Manual, is "HO2S Data = Greater than a predefined threshold". And HO2S refers to one of the heater oxygen sensors.
There is a list of things to check in the diagnostic procedure. Do you have any aftermarket equipment installed?
The list includes but is not limited to these items:
Exhaust System - Leaking / Missing components / Restricted >> Refer to: Symptoms - Engine Exhaust
Fuel - Contaminated / Poor Quality - Refer to: Alcohol/Contaminants-in-Fuel Diagnosis
Fuel Injectors - Restricted >> Refer to: Fuel Injector Diagnosis
Ignition System = Malfunction >> Refer to: Electronic Ignition System Diagnosis
Intake Air Duct - Loose Clamps / Cracked / Visible Damage
Intake Manifold - Leaking
Mass Airflow Sensor - Contamination of the measuring element / Water intrusion
Positive Crankcase Ventilation System - Incorrect connection / Leaking / Restricted >> Refer to: Crankcase Ventilation System
Inspection/Diagnosis
Vacuum Hoses - Incorrect connection / Kinked / Leaking / Restricted
If it does not go away, you are going to have to have the dealer perform the diagnosis under the warranty.
Thread Starter
Racer
Joined: Jun 2025
Posts: 264
Likes: 204
From: Rochester NY
Well I haven't driven it since I cleared the code a few hours ago. Was going to wait till tomorrow morning. . The cars brand new 1057 miles so no mods done to it. I guess I wait and see what happens tomorrow,
Thread Starter
Racer
Joined: Jun 2025
Posts: 264
Likes: 204
From: Rochester NY
Well thankfully the code didn't come back. Also stopped at the dealer and talked to the service advisor. Didn't get much info from him but I walked out feeling better that the cars ok.
