P0. 42. 0 DTC Code Catalyst System Efficiency Below Threshold Bank 1Welcome to P0. DTC diagnostic trouble. P0. 42. 0. The P0. If your cars. check engine light is on, get that code read in case its a P0. Install Catalytic Converter Without Welding' title='Install Catalytic Converter Without Welding' />A P0. OBD II equipped vehicles. All vehicles. from 1. North America support this generic powertrain code. This code is a pretty common one and this site is here to help the average. DIY car owner like you troubleshoot, diagnose, and fix. Install Catalytic Converter Without Welding' title='Install Catalytic Converter Without Welding' />P0. If your car has multiple trouble codes DTCs, its always a good idea to. For example, if you. P0. 30. 0, P0. 42. P0. 17. 1, then youre going to want to tackle. P0. 30. 0 Random Misfire code first resolve it, and then tackle the P0. The reason for that is that the first code could be causing further. DTCs to be set. If youve come to this site you most likely already know that you have a. P0. 42. 0 code. To start, we strongly recommend you seek the services. Also, be sure to follow proper diagnostic. If you simply change parts. This site is here for information purposes only and is meant to help. It is not intended as car repair advice. OK, so what does a P0. As mentioned above, the codes description is Catalyst System Efficiency. Below Threshold Bank 1. OK, now tell me that again in plain English. Bank 1 refers to the side of the engine which contains. On inline engines such as 4 5 cylinder engines, there is. So, to really simply things lets just say that the. Zt2 Wideband AirFuel Ratio Meter and Datalogging System Zt2 items ZT2 Wideband AFR Controller Oxygen Sensor Harness 10 length Signal Harness 1 length. The metal smelting and refining industry processes metal ores and scrap metal to obtain pure metals. The metal working industries process metals in order to. RwLn37nPSg/0.jpg' alt='Install Catalytic Converter Without Welding' title='Install Catalytic Converter Without Welding' />O2 sensor. FYI this code is identical to P0. You may even find you have both P0. P0. 43. 0 trouble codes at the same time. There are no symptoms so why should I fix it Great question A P0. Bts 06 Drivers there. MIL malfunction. The reality is there is still something. A poorly maintained car will run less efficiently, burn more gas, and cost. Plus, if your check engine light. P0. 42. 0 code and you decide not to fix it, another more serious. Way Back Into Love Midi Files on this page. The MIL lights up whether you. While I have your attention, dont forget to do oil. PSI. So what is causing my P0. There are a number of things that could be causing this p. The most common thing is the catalytic converter itself is no longer. The other likely thing is the rear O2 oxygen sensor. Other things could include exhaust leaks, damaged. O2 sensor wiringconnectors, plugged catalytic converter. OK, so I want to diagnose things, what do I do next The easiest thing to do first is a visual check of things. Visually inspect. If any of those symptoms. Then, visually inspect. O2 sensor behind the converter. Check for broken wires, obvious. If all that checks out, youll want to check the operation of. O2 sensor. To do that, youll need access to a scan tool or oscilloscope. Check that the waveform is pretty steady. If the reading fluctuates then the. A few additional DIY friendly tips include Try Cata. Clean, a gas tank additive. Run 1 gallon of lacquer thinner through the gas tank when at 12 tank as per Scotty Kilmer. If you have a heat temperature infrared gun, check the exhaust temperature before the cat and right after. The temperature at the exit should be in the neighborhood of 1. Fahrenheit hotter when the engine is fully warmed up and you have the engine running at about 2,5. Dont accidentally take the temperature of heat shields, pipe only. On some vehicles such as some Subaru models an ECM reflash will fix the problem. As you can see a P0. Good luck If after some diagnosis you find you do need to replace the converter, please consider buying one using this link from Amazon as we get a small commission if you buy anything after clicking the link. Thanks Other P0. Here are a few links to some other sites with great P0. User CommentsPlease browse the comments below for tips and tricks from other vehicle owners and technicians.