P0430 Cat Efficiency Diagnostics 

Did you get it fixed ?. I have the same vehicle and same issue.

@@joshc710 yes I did, they replaced All the injectors. And about 20,000 miles later the check engine light came on Again for the Same thing. So 2 weeks ago they all got replaced a second time. But dealer would only split the cost, not cover entirely.

Regret hearing about that Gallagher. As one of my Grandfathers use to say from East Texas , " Now that's a Scandal and a Shame". P0420/P0430 Checks : Catalytic Converters Below Threshold 1. Intake Manifold Leaks 2. Leaking Fuel Injectors 3. Incorrect Spark Plugs 4. Faulty Catalytic Converters 5. Ignition Timing Error 6. Coolant Leakage Fault 7. Technical Service Bulletin Fix 8. EGR problem 9. Oxygen Sensors Faulty 10. Oil or Anti-Freeze entering Exhaust 11. Hole in Exhaust before Front Oxygen Sensors 12. Silicone contamination 13. Road damage to CATS 14. Front/Rear O2 Sensors switched mistake

@@cliffordgallagher4531 2,000 Miles or 200 Miles Later, right. Surely not 20,000 miles , right.

@@cbarkwell1000 it was just under 20,000 later. Was about 10 months after the first set of injectors. Which should last longer

Are you sure you wonna know ? I'll give you 90 % of the Ănswers. The Long Term Fuel Trim ( Air/Fuel Ratio ) Specs. are - 10 % to + 10 % @ Idle Speed & @ 2,500 RPM...If not, it's time to call Hôuston....The Smart Tech. Test all of thêse components & give thêse Pass ỏr Fail Results to the Customer : Positive out of range LTFT, say +25 means the Computer had to add 25 % to try & bring vehicle back to proper Air/Fuel Ratio ( 14.7/1 ) because òf this serióus Lean Condition -25 % LTFT means the Computẻr had to Subtract 25 % of Fuel to bring car back to propẻr Ảir/Fuel Ratio bêcause the cảr/truck ís Running Too Rich ( Fuel Ecônomy will Suffer ) + Fuel Trims > than 10 : 1. Ignition Systém Pass or Fail Results 2. Exhaust System Pass or Fail Results 3. Low Fuel Pressure results 4. Clogged Fuel Injectors Pass or Fail 5. Mass Ảir Flơw Sensor Fault 6. Oxygen Sensors Results 7. Vane Ảỉr Flơw Sensỏr dêfect 8. Manifold Absolute Pressure Sensỏ Fault 9. Throttle Position Sensor fault 10. Vacuum Leaks from Intake Manifold , hosés ỏr unmetered ảir from intake snorkel 11. PowerTrảin Côntrol Module malfunction ( The cars Main Computer ) Fuel Trim reading > than - 10 % but especially greatẻr than - 20 % & this Number ís fỏr Both ( - Fuel Trim ỏr + Fuel Trim ) : Test Results for : 1. Dirty or the Wrong Grade of Oil Example : Car calls for 5W-20 Motor Oil but Saw Mill Mechanics or DIYer sáy "Oil ís Oil", so 10W-30 Oil is ínstalled. I once worked for a real nice fella in Downey, CA. He put the WRONG GRADE òf Mổtor Oil in a Womans car. When she drove to thê Los Angeles Forest , her Engine SEIZED up on "er - going up those Steep A_ _ Hills....... ......I wunda how much that cost 'em... 2. Dirty Air Filter !! 3. Engine staying in OPEN LOOP Status Too Long 4. Clogged PCV Valve 5. Idle Speeed Too Low 6. Advanced Ignition Timing 7. Mass Air Flow Sensor Faulty 8. O2 Sensors Faulty 9. Engine Coolant Temperature Sensor Fault 10. Intake Air Temperature Sensor Fault 11. Manifold Absolute Pressure Sensor Fault 12. Throttle Position Sensor Fault 13. High Fuel Pressure 14. Leaking Fuel Injector 15. A Grounded Fuel Injector 16. Leaking Fuel Pressure Regulator 17. Low Compression from 1 or more Engine Cylinders 18. Incorrect Camshaft Timing 19. Faulty Evaporative components Is your Head Hurting yet ? Ex - Smog Repair Tech. Southern California

Charles E. Barkwell wow amazing! Thanks! I won’t lie, makes me want to trade in my car 😂

In my case, my long-term fuel trim on Bank to is 13% but that’s only while idling. When I’m driving it actually looks fine, so I thought it was a vacuum leak but I wasn’t able to find one

Damaging CAT from many thinks putting cheap gas , leaking coolant in to Exhaust system or engine burning oil or Fuel injectors worn this are main problem will damage CAT so quick if your car mileage is lower than 150K

@@danyeldan2139 Thanks!

See Gallaghers Comment Section.

I'd like a smoker for a number of reasons, like checking turbo intake piping. The coolant pressure tester I have rented from autozone. It worked well to find a stubborn hard to find coolant leak on my sons vehicle.

I put my leaf blower in my tail pipe on lowest throttle and sprayed soapy water all around my exhaust and found my pinhole leaks.

How can you drive for 10 years with code 430 but mine won’t even start ? How’s that work ?

If there í a small hole in the Exhaust before the 1st Oxygen Sensor, that's too much wind/Oxygẻn touching the Tip òf the Oxygen Sensor. The Oxygen Sensor will read this as a Lean Condition ( Lơw Voltage Constantly ). The Computer will try to correct thís Fault and will make the car Ảir/Fuel Ratio run Too Rich , thus making the vehicle fail fỏ High CO ( Carbon Monoxide ) on vehiclés in California up to Model Years 1999 ______ and some Smog Techs or DIYers will have Customers paying fỏ components that make cars Run Rich......In Reality, it was a Hole in the Exhaust System , that wás the problem ( which he showed ). Never woulda known the real fault if Smoke Machine never was used. The Front Oxygen Sensors Voltages should be switching faster than women blinking thẻi eyes at a man.....Rich Voltage to Lean Voltages quick & constantly. Smog Repair background Southern California

Odd that both cats would be bad. Sometimes these engines build gas in the oil due to running too rich. That could be caused by a number of reasons. Bad or weak sparkplugs or ignition coils etc. Oil in the exhaust may be a build-up in your intercooler. That comes from the pcv valve. Also, those PCV valves are known to go bad allowing turbo pressure into your engine which could intoduce oil into your exhaust.bad turbo bearings or seals could do the same but its unlikey both sides go at the same time , which leads me to believe you have one of the aforementioned issues.