Trouble code p1131 means a lean condition for engine bank no. 1 has been found by the powertrain control module. This can be caused by a couple of things. The first is a bad O2 sensor. These are easy to find and replace, so they should be one of the first things You consider. The next option would be a damaged vacuum line. This can either be a cracked line, or there may be a loose seal or gasket, If neither of these is the culprit then You should check the fuel injector and the starter. These are hard to get to though, so You will want to do them last if You can help it. Fixing this issue will make the code go away.
Trouble code p1131 means a lean condition for engine bank no. 1 Has been found by the powertrain control module. Code p1131 can be triggered by a vacuum leak, problem with the fuel injector, problem with the ignition or a defective oxygen sensor.
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