P1131 code ford f150

P error code. Thread Tools.

P at startup. Thread Tools. Likes: Received 9 Likes on 8 Posts. P during warmup. My '99 4. Code P is upstream bank 1 oxygen sensor too lean.

P1131 code ford f150

I have ford f 4. Had a new fuel pump the whole assembly … original equipment not aftermarket installed about 3 months ago mid-June and changed the fuel filter as well. Mostly I drive it only once per week … just long enough to get everything warmed up at least 20 minutes or so. So, since the fuel pump change I have only put about miles on it. Given that it idles and seems to run smoothly, would you say the O2 sensor is the likely culprit? Or should I investigate other possibilities first? Have you cleared the code once? If not get it cleared and see what happens. If you can get to Alldata, the DTC section has the list. The main catagories are electrical system, fuel system, EGR system, induction system, and base engine. What you would be looking for is something that is allowing too much oxygen into the exhaust gases. It could be a vacuum leak, a bad dip stick seal, a leaking exhaust gasket, cracked exhaust manifold, etc. With K miles, a check of the integrity of the exhaust system would be in order. As you suspect, another cause of P Lack of HO2 sensor switch, sensor indicates lean is a bad sensor i. If the code returns after a clearing, you might just roll the dice and replace the bank 1 precat HO2 sensor.

P is the only code. So, since the fuel pump change I have only put about miles on it.

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While this may seem harmless at first, keep it hanging for long enough, leading to part damages and decreased fuel economy. The P Ford code is linked to the oxygen sensor and signals the engine is running on a lean or rich fuel mixture. This article will discuss everything about the P Ford code, from what it means to diagnosis and fixes. Error Code P is displayed when sensor 1 or the oxygen sensor bank 1 does not switch enough to lean. The heated oxygen sensor voltage is below 0.

P1131 code ford f150

P is a diagnostic trouble code that applies to vehicles manufactured by Ford, including the F Trouble codes that start with P1XXX were reserved for manufacturers. This code occurs when the upstream O2 sensor on bank 1 fails a diagnostic test twice in a row. Bank 1 — Bank 1 is the part of the engine with the first cylinder. Bank 1 is easy enough to find. Typically, there are not going to be any symptoms associated with P other than the check engine light. You might big might here smell the faint scent of fuel. There are some things that you can do at home to detect what is causing P and repair it. The upstream oxygen sensor on your F is easy enough to find.

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Find More Posts by Jbrew. Since this is an obvious indication of a lean burning cylinder can I make the assumption my most likely problem is dirty fuel injectors on those cylinders? Since I have one it is cheap for me. Thanks all. P during warmup. This is where you mis interpret the end result of the code. You need some instruction on this as follows; The code is indicating an over rich appearing condition at the end of a PCM test that fails switching. Code reader shows P The opposite of rich is lean. It could be a vacuum leak, a bad dip stick seal, a leaking exhaust gasket, cracked exhaust manifold, etc.

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Fuel regulator diaphragm leaking fuel into the intake. Lets try this again; Code is telling you there is a rich,-- rich,--rich, condition. Code reader shows P Code P is upstream bank 1 oxygen sensor too lean. Glad you got it repaired. If I clear the code. Big brother watches, and You don't know it! It will show the actual readings real time under load and idle. Look for any cause of excess fuel. Send a private message to BigEd The computer leans,leans-- leans the fuel table trying to account for the rich condition thus setting the code