You could also look for a huge blockage in the filter box, we had one once where mice or squirrels attempted to build a nest in the bottom of the air filter box, which realy plugged the airflow. We have done some research and posted common problems for some cars, please read further. Using the grey vertical line as a median point, the injector pulse width is increased to the right red , to inject more fuel, and decreased to the left blue to inject less fuel. Please use the form on our Contact Page to get in touch with us. If the signal from the oxygen sensors calls for less fuel, the powertrain control module will act out a negative fuel trim. It is different because of the motor displacement, not the chassis. Do a search for diagnostics on here there are good posts to explain how to etc.
There are many possible reasons why fuel pressure can be either too high or too low at the fuel rail, but resist the temptation to automatically assume that the fuel pump is at fault. . HubPages Google Analytics This is used to provide data on traffic to our website, all personally identifyable data is anonymized. This can mean a negative fuel trim or a positive fuel trim has been detected. It may be clogged, or damaged due to the long-term effect of code P0170. What causes the P0173 code? The reason I mentioned the O2 sensors is when I obtained the car there were several faults and the engine was lacking in maintenance. However, if the amount of compensation is too much, a P0173 code may set.
The P0170 code can range in seriousness. I also attached some data maybe it would help you have some idea on the solution! Due to the large number of possible causes of P0170, it is recommended that all other codes present be diagnosed and repaired before attempting to repair P0170 to avoid a misdiagnosis. Comscore ComScore is a media measurement and analytics company providing marketing data and analytics to enterprises, media and advertising agencies, and publishers. HubPages and Hubbers authors may earn revenue on this page based on affiliate relationships and advertisements with partners including Amazon, Google, and others. Ran bad too though and had these codes. I have a mityvac vacuum pump and guage, just need a few pointers! Features Google Custom Search This is feature allows you to search the site. We use data about you for a number of purposes explained in the links below.
You should also check that the spark plug gap is set properly. Intake Manifold Gasket Leaking If the engine is a V8 or V6 and only one side or bank is reporting a fault code it could be a leaking intake manifold gasket or leaking manifold. Replace the sensor, clear the code, and drive for about 5 to 10 miles. Also, a couple of times lately the Fuel Reserve light blinks; this also happened to me once in the fall. To provide a better website experience, axleaddict.
Due to the amount of free content we provide, we cannot guarantee the accuracy of all information. The symptoms of code P0170 on effected vehicles can vary greatly, but note that not all symptoms will be present in all cases. Since I am 3 hours from a dealer, I will take it to the local guy this week to check codes but in the meantime wondering if anyone has a clue - thanks. Although it is rare for fuel pressure problems not to be indicated by a warning light or a stored trouble code for that matter , it does happen and especially on older vehicles. Pretty confident it's the mass airflow sensor though. YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. This tells you where to start testing.
Spark plugs typically need to be replaced every season or 25 hours of use. Note that this is a rare event, and the fault must be sought elsewhere before any controller is replaced. Turbocharged engines present their own symptoms, including fuel contaminated engine oil leaks that are drawn into the induction system. You could also look for a huge blockage in the filter box, we had one once where mice or squirrels attempted to build a nest in the bottom of the air filter box, which realy plugged the airflow. Vimeo Some articles have Vimeo videos embedded in them. How do you troubleshoot code P0170? So let's see if it worked, and how long before the check engine light resurfaces once again. Does the intake boot have any cracks? Sporadic or intermittent causes of code P0170 can be extremely challenging to find and resolve due to the relatively large number of causes, and in some cases it may be necessary to allow the problem to worsen considerably before an accurate and definitive repair can be made.
I didn't feel or small any gas, so i think the part's working. But if it's not under warranty, it's yours to play with. Changed these, and a spongy crankcase breather pipe. This seems rather unlikely but worth checking into all the same. Same malfuntion code came up on my '95 C220 car was idling rough at startup.
Like above replies, simple things first, make sure nothing is loose or broken, unhooked. I did notice that the fuel pressure seemed to drop quickly when I depressured the system for the filter change. As such, these requests are far less likely to cause a code to be stored. What repairs can fix the P0170 code? The car has been running great then today I had a check engine light come on, when I did a scan it specifically came up with trim fault ,which according to Bently Manual is down to a faulty O2 sensor, and as the car has done just over 96K I suspect that this may well be the cause. TripleLift This is an ad network. Once this information is found, the owner of the vehicle may decide to just replace the mass air flow sensor. If the code does not immediately return after the completion of a few drive cycles, it would be safe to assume that the problem had been resolved.
You will have to figure out which way it is running and examine the possible problems. P0170 is a fuel trim malfunction, the short term fuel is always chasing O2 sensor no 1, I would take a closer look at the Maf sensor and O2 sensors but more so the maf Air flow meter Bring the rpm up to 2,500 rpm when the engine is fully warm 80 deg to 100 deg. Nonetheless, it is possible for these changes not to occur, even though the electrical side of the sensor and its control circuit is in perfect condition. If no symptoms are present while this code is stored, then the driver may be able to get by for a short period of time with this code saved. Statistics Author Google Analytics This is used to provide traffic data and reports to the authors of articles on the HubPages Service. Akismet This is used to detect comment spam.
If this is the case, the causes of any other code must be found and resolved first. It must stay at this range during idling, going down hills, cruising, and at highway speeds. Remarketing Pixels We may use remarketing pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to advertise the HubPages Service to people that have visited our sites. If camshaft or crankshaft sensor codes, ignition misfire codes, or low fuel pressure codes are also present, diagnose and repair them before attempting to diagnose this code. If your system is adapting to.