Small to Medium Leak - This is an OBD2 code that will set when you have a leak in the evap system. P0442 Evaporative Emission Control System Leak Detected Find out what would trigger this OBD2 code. When they don't flow back to the engine like they should this code comes up. The EVAP system is supposed to collect excess fuel vapors and store them until they can be burned in the engine. P0441 Evaporative Emission Control System Incorrect Purge Flow There are a few things you can check yourself though. P0440 Evaporative Emission Control System MalfunctionĮVAP codes are very tricky and tough to diagnose for a DIY'er. Replacing the CAT, find out if there are other things that might beĬausing the problem. It finds that it's not it will set this code. The 02 sensors) to be sure that is cleaning the exhaust properly. The catalytic converter is constantly being monitored by the PCM (using P0420 Catalyst System Efficiency Below Threshold (Bank 1) Sure to know all the possible causes before you start replacing parts. Of the common ones where people just go replace their EGR valve only toįind that it's not the problem. P0401 Exhaust Gas Recirculation Flow Insufficient DetectedĮGR (exhaust gas re circulation) codes are tricky. Then they startĭriving their car or truck just to find that the check engine lightĬomes right back on with the same code. Just go replace their CMP (camshaft position sensor). There are a good number of things that can cause this code. P0340 Camshaft Position Sensor Circuit Malfunction Read more about all the things that might be causing your vehicle to be giving you this code. P0301-p0312.p0301 is for a misfire on cylinder 1 and p0302 is for cylinder 2, etc. This is an article that covers all of the misfire codes. Low compression and multiple plugged injectors will cause it. Random it is likely something that affects all cylinders. Since it is for multiple cylinders and/or This code is likely caused by something other than a single spark plug P0300 Random/Multiple Cylinder Misfire Detected The same article, but these two codes are interchangeable. Is found on the opposite side of the exhaust system. This code is pretty much the same as p0171 it is just that the condition OBD2 code, and it could be even just a false reading. This code means that there is too much air entering your engine compared OBDII Codes List P0171 System Too Lean (Bank 1) including additional details on what triggers it in the first place. I have listed the commonĬauses for each type of trouble code below. To pages with diagnostic information about the most common OBD2 codes.Ĭars or trucks will have one of two things that will commonly fixĬertain codes, but for most vehicles there are a list of possible

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Maxiscan code list