I changed the sensor, the light went out, I went for a drive and when I shut off the engine and re-started it, the check engine light came back on with the same codes. Lean mixture of O2 and gas means there is too much oxygen in the exhaust, while a rich mixture of O2 and gas means there is not enough oxygen in the exhaust. A rich mixture of oxygen and gas means that there is not enough oxygen in the exhaust. But, like anything that causes the service engine soon light to come on it is a good idea to have it fixed as soon as possible. Water entry and corrosion are common faults.
Check the oxygen sensors for damage. Variations of greater than 10-percent in either direction will result in a stored code and an illuminated malfunction indicator lamp. Proper fuel pressure should be at 40 psi. Usually heater problems have codes associated with them, too. The O2 sensor switches back and forth from lean to rich fast. Or you could go to town to and replace the entire harness, but that is usually easier said than done, no matter what, you have your work cut out for you plus you have to fix the ruptured oil line too.
After you instruct it to perform the scan, it speaks with your car's computers to find out exactly what's prompting the light to turn on. I have discovered the problem. Bank 2 Sensor 2 I thought these O2 sensors lasted longer than that. Jun 23, 2012 Bank 2 is the bank that is farther back than the other when looking at eng from the front you will see that one cyl head is farther forward closer to radiator than the other. P0137 Rear Heated Oxygen Sensor Bank 1 harness is open or shorted.
I have a 2007 Jeep Wrangler and my check engine light came on. An will make it easier to reach an oxygen sensor that is positioned awkwardly, and a is used as a heating element to assist in the removal. However, a properly working post-catalyst sensor will exhibit small changes at a slower rate than front pre-catalyst o2 sensors. P0131 Front Heated Oxygen Sensor Bank 1 harness is open or shorted. Definition This error code refers to the O2 sensor behind the catalytic converter, at the back side of the exhaust. This system tests the fuel system to make sure it is not leaking fuel vapors into the air.
This often turns out to be the sensor. You may see an increase in gas mileage, but a post cat sensor rarely causes driveability issues unless they are shorted to ground. This code basically means that the Bank 2, Sensor 2 or second o2 sensor back on bank 2 signal voltage is below what is considered normal for that sensor. Now it doesn't seem like a post cat O2 sensor would cause this but. How do you troubleshoot code P0157? It has occasionally thrown a P0157 code. This code typically indicates that there is an issue with the wiring or harness going to the sensor, or the sensor itself is bad.
Bank 2 typically denotes the engine bank of the engine block that does not contain the number 1 cylinder. The easiest way to find out what this light is telling you is to hook your vehicle up to a scan tool. Although the following link is for a P0157, it is. If the oxygen in the exhaust gas increases, the air-fuel ratio becomes Lean. I now have a p0157 and P0158. Engine running lean could also register lean codes such as P0171 and P0174.
What causes the P0157 code? Indicator and headlight bulbs need regular maintenance for them to keep functioning properly. I have had a problem with some check engine lights on my 05 liberty 3. There should be a perfect balance in the mixture level of oxygen and gas, as neither lean nor rich is good for the catalytic converter as both can cause it to fail prematurely. The Engine Control Module adjusts the fuel injection time so that the air-fuel ratio is nearly stoichiometric. Need help with a P0157 code? The wiring on the left downstream one was rubbing up against the exhaust and Having an issue with my wifes 2004 liberty.
It should be at 40 psi. If the oxygen in the exhaust gas decreases, the air-fuel ratio becomes Rich. Sensor 2 is mostly about checking to see that the exhaust has been scrubbed by the catalytic converter. I'm going to wait 'til it warms up a bit and the ice melts off the truck. The wiring to the right downstream sensor is very strained to reach it.
It was throwing a p0157 code p0157 O2 Sensor Circuit Low Voltage Bank 2 Sensor 2 so I hopped on down to the parts store and picked up a new Bosch sensor. If you find there is no battery voltage feeding the o2 sensor use the associated code to diagnose that. So I am patiently waiting for it. How does a mechanic diagnose the P0157 code? Replacement of the incorrect oxygen sensor is also a possibility. Looking at scan tool: O2 sensor 11 stayed around 3.