2010 L99 P219A Cylinder Imbalance Bank 1 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

bub · 01-07-2019, 09:36 AM

Has anyone solved this Code P219A or B (Cylinder Imbalance Bank 1 [A] or 2 [B])? Searched but saw no definitive solutions.

2010 SS with L99 auto. 143k miles.

Thus far I have done & observed the following:

* Cleaned air filter - still throwing code
* Searched for vacuum leaks - no finds - still throwing code
* Swapped left and right front heated O2 sensors to see if code would switch banks - it did not - stayed with left bank 1, so assume O2 fine
* Swapped left and right fuel injectors, again to see if code would switch banks - it did not - stayed with left bank 1, so assume injectors are fine - they looked clean. O ring seals checked for vacuum leaks, some seem "loose".
* Installed new plugs left bank 1 - still throwing P219A code after about 30+ miles.

Freeze data when code is set is usually 70+ mph, seems like prolly when DoD is disabling V4 and going back to V8 mode.

Next step is to tune out AFM/DoD altogether and see if it still throws it.

???

John_C · 04-02-2019, 03:08 AM

Ever figure this out?

Pro-tuned · 04-03-2019, 11:52 PM

Pull down your cats and check them...

wasthatacop? · 06-18-2020, 02:25 PM

Driving home on freeway and a P219A code popped up on my 2010 Camaro SS. I had the local Chevy dealership supply and install a crate engine (same L99 6.2 L) at 93,000 miles. Im currently at 139,000 miles. No engine mods. Nothing seems out of order while it's running.

"bub", did you ever figure this problem out?

01-07-2019, 09:36 AM	#1
bub Drives: '17 1SS 1LE & '15 Corvette Z06 Join Date: May 2009 Location: Olathe, KS Posts: 669	2010 L99 P219A Cylinder Imbalance Bank 1 Has anyone solved this Code P219A or B (Cylinder Imbalance Bank 1 [A] or 2 [B])? Searched but saw no definitive solutions. 2010 SS with L99 auto. 143k miles. Thus far I have done & observed the following: * Cleaned air filter - still throwing code * Searched for vacuum leaks - no finds - still throwing code * Swapped left and right front heated O2 sensors to see if code would switch banks - it did not - stayed with left bank 1, so assume O2 fine * Swapped left and right fuel injectors, again to see if code would switch banks - it did not - stayed with left bank 1, so assume injectors are fine - they looked clean. O ring seals checked for vacuum leaks, some seem "loose". * Installed new plugs left bank 1 - still throwing P219A code after about 30+ miles. Freeze data when code is set is usually 70+ mph, seems like prolly when DoD is disabling V4 and going back to V8 mode. Next step is to tune out AFM/DoD altogether and see if it still throws it. ???

04-02-2019, 03:08 AM	#2
John_C LSx FTW!!! Drives: 2010 Camaro 2SS RS Join Date: Jan 2017 Location: TN Posts: 767	Ever figure this out? __________________ 2010 2SS RS A6 781rwhp on E85 Stage 2 ProCharger D1X Circle D 3400 Triple Disc Kooks Jet Hot Headers Kooks Full 3in exhaust Trick Flow GenX 255's Polished PAC .660's & Ti-retainers TSP VVT 3.2 cam kit w/DoD Delete Smith Bro's Trunnion kit AEM X-Series OBDII Widebands FIC ID1300x Injectors GM ZL1 High Output Fuel Pump DSX Tuning Flex Sensor DSX Auxiliary Fuel System Tim King Stage 4 Max Effort CTSV 6L90 DSS 1 piece aluminum driveshaft JRE 6L80E / 6L90E Dipstick NGK Iridium IX spark plugs #7 heat range Mighty Mouse Camaro 5 Wild w/-12an and Billet Black HP Tuners VCM Suite

04-03-2019, 11:52 PM	#3
Pro-tuned Angewendet Ingenieur Drives: 14 Camaro ZL1 Join Date: Apr 2015 Location: USA Posts: 401	Pull down your cats and check them... __________________ ———— LQ9, Iron Block, Forged internals, 408CI, Jannetty custom cam, TS short block, Whipple, Hardened Jackshaft, PRC 260, 2X3 Dynatech Full Competition, HF Cats, CAI, NW 103, Chee, ID 1300, COPO Breather, MSD, Fore Dual Pump, ultratorque, E85, dual Meth, True Trac, 3:45, 1500hp axle-shafts, DSS CF, BMR, custom Pearl/Candy paint by Jaidah.

06-18-2020, 02:25 PM	#4
wasthatacop? Drives: 2010 2SS Join Date: Apr 2017 Location: Los Angeles Posts: 360 View My Garage	.. same problem here. Driving home on freeway and a P219A code popped up on my 2010 Camaro SS. I had the local Chevy dealership supply and install a crate engine (same L99 6.2 L) at 93,000 miles. Im currently at 139,000 miles. No engine mods. Nothing seems out of order while it's running. "bub", did you ever figure this problem out? __________________ 2010 2SS living in Los Angeles replaced engine @ 93,000 miles w/ crate engine, camshaft by Comp Cams installed by me, replaced valve train parts, 1.4" BMR lowering springs ZL1 factory rims misc: drilled and slotted rotors, fresh air brake cooling system, new speakers, installed reverse camera, muffler delete