Do a thorough check on all rubber hoses, from vacuum lines to the intake tube. Still have light after battery disconnect and three starts. Fuel delivery is controlled differently during Open Loop and Closed Loop. If the light comes on, even for a second, you know that you have a short circuit causing the P0151 trouble code. Check all vacuum hoses at the engine, make sure no hoses are disconnected, cracked or damaged. While in fourth gear it did not want to accelerate past 2000 rpm.
I got it home and read the codes. Chevy Silverado P0151 Causes Here are the most common issues that cause the P0151 code in the Silverado. Do you have any suggestions? How do you troubleshoot code P0101? In some cases it will not idle without feathering the gas pedal. All of these can give you clues as to when the problem is occurring. 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.
If you don't find them, put a vacuum gage on it can check. Hi, Well I replaced all four of the o2 sensors the two in front of the converter and the two after the converter, the fuel pressure regulator and cleaned the mass air flow sensor. I am thinking this may be a P0151 which is O2 sensor related. At least bracket and harness was the same. I pulled over to check any codes. Generally-speaking, if something looks out of place, then it probably is. Same thing with the second sensor.
Thanks, mwmst Bank2 sensor2 is located on the pass side exhaust behind the cat convertor. 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. Remembering that I read someone moved there post cat O2 sensors to the front of the cat , I had nothing to lose and tried it. If both of these codes are stored this means that both banks of the engine have excessive oxygen in the exhaust. I appreciate the tips I've read here at gm-trucks. I would do a fuel injection cleaning service and then clear codes and see if the codes regenerate. Cleared the codes and went on my way.
Conclusion Good luck finding whatever caused P0151 in your Chevy Sonic. The voltage varies, depending on how much air is passing through the sensor. Here hey are presented in order somewhat of most to least likely to cause the problem. An engine needs three things to run — air, fuel, and spark. Due to factors beyond the control of Falcons Garage, no information contained in this video shall create any expressed or implied warranty or guarantee of any particular result.
I have reset it several times, and usually returns within 10 miles. I really do not want to change out more than one. The P0171 is almost always a vacuum leak. To deliver the most efficient power, a precise amount of fuel needs to be injected into the cylinder, after which it is compressed and ignited, resulting in a power stroke. I also took it on the highway for a sprited drive to work some of the sea foam in the fuel through the engine. Then it happened again a few days later while she was driving home from work.
Therefore the most likely cause of P0171 and P0174 codes is a vacuum leak. Well after alittle bit of highway driving it went away and didn't happen again til' later that night on the drive home. System too lean Bank 1. The exhaust leaks may be more when the engine is cold, and decrease as the engine warms up. At first I only had one code for. Looks like I changed the o2 sensor for no reason. I really do not want to change out more than one.
If you have anything that you would like to add, please feel free to leave a comment below. Here hey are presented in order somewhat of most to least likely to cause the problem. In some cases, there can be other symptoms as well. I checked plugs and wires and everything else that would cause a random misire. So my O2 sensor code came back on. Cleared codes and it was fine for a couple days.
The source of a vacuum leak can be one of many things. If not other possibilities are front O2 sensor is too old and should be replaced if mileage is greater than 100k then replace. Mice also seem to have a taste for rubber hoses and electrical insulation, and chewed-through hoses and wires are a common issue. After driving for about a week, My truck suddenly became a dog under partial throttle and the service engine soon light came on. The code came back on after a while and things got worse. Conclusion Good luck finding whatever caused P0151 in your Chevy Silverado. You want the engine running and spray on the outside but do direct the stream onto the hoses, if it is a vacuum leak, the engine idle will change speed, then you have detected a leak, repair the vacuum leak and see how it runs! Ours has been fine since the 02 sensor replacement.
Jun 05, 2009 The P0420 code is a Catalytic converter efficiency code check the compression. I checked again, P0171, and now P0131. I checked the codes the next morning using my Actron Scanner and it pulled up P0171. Hi, Well I replaced all four of the o2 sensors the two in front of the converter and the two after the converter, the fuel pressure regulator and cleaned the mass air flow sensor. This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation.