I have a 2015 dodge dart that throws a lot of codes but nothing that I do fixes anything. It acts like it has a bad fuel pump but the pump seems to operate properly. The car turns off when I press on the gas and break too hard. The car doesn’t always turn on after it dies. The codes are p0128, p0457, p1d73, p0441, p0456, p2172
nothing that I do fixes anything.
What diagnostic steps have you taken so far?
It acts like it has a bad fuel pump but the pump seems to operate properly.
Have you checked fuel pressure to verify that?
The codes are p0128, p0457, p1d73, p0441, p0456, p2172
https://www.carparts.com/blog/p0128-coolant-temperature-below-thermostat-regulating-temperature/
https://jordistireshop.com/p1d73-dodge-dart-code/
https://www.carparts.com/blog/p0441-code-evaporative-emission-control-system-incorrect-purge-flow/
https://www.carparts.com/blog/p0456-code-evaporative-emission-system-small-leak-detected/
What does your live data look like? Fuel trims?
With this many codes, some of which appear to be unrelated, you might want to check basic electrical system integrity. Load test battery and alternator, check battery terminals and cables, check grounds.
p0441 indicated a problem with the fuel vapor purge valve, which can cause the engine to stall and not start if the purge valve is stuck open. Due to an excessive amount of fuel vapors being sucked into the air intake manifold from the fuel tank.
It's easy to test the purge valve with a scan tool. Start the engine and then monitor the fuel tank pressure. If the fuel tank pressure shows a negative number that means the purge valve is stuck open and drawing a vacuum on the fuel tank.
I stumbled across a technical service bulletin about a computer PCM update for 2015 Dodge Darts while searching p2172.
For example, we are aware of a bulletin that applies to 2013-2015 Dodge Dart and Chrysler 200 cars, bulletin number 18-006-15 which involves this DTC and others, and the fix is to reprogram the PCM.
Read more at: https://www.obd-codes.com/p2172
Copyright OBD-Codes.com
The trim looks fine until I got it to 2500rpm. The stft went to -18% while holding 2500rpms.
Try testing for a bad fuel pressure regulator. https://www.youtube.com/watch?v=G6610136mjE
Yes I’ve changed the purge valve, gas cap, checked the electrical, and flushed the gasoline
@leah_17 Do you have a scan tool to check short and long term fuel trim? It sounds like there might be a vacuum leak and fuel trims would confirm if this is the case.
I have the ability to add a fuel trim on my scan device but what do I look for ?
I have the ability to add a fuel trim on my scan device but what do I look for ?
Look for the fuel trims being out of whack, indicating a mixture problem.
Ok what should they be at?
The trim looks fine until I got it to 2500rpm. The stft went to -18% while holding 2500rpms.
@leah_17 If short term and long term fuel trims are both 0% at idle, then there probably isn't a vacuum leak.
Yeah I couldn’t find any vacuum leaks and I just replaced the fuel pump because someone told me that it might be the fuel filter but that didn’t change anything either.