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Burns a lot of gas, shows no code even when gas cap is left off

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Try doing a standard tune up. change fuel filter, plugs, wires, and 02 sensors to start.

Posted on Apr 23, 2010

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My husband has a 2014 Dodge Ram 1500., Hemi 5.7 liter. It has been showing some trouble codes. P2314, It is getting 9 miles to the gallon. He has replaced the plugs, coil boots,

Make sure that is the only code you are getting. If it is, then you may have a gas leak somewhere. I say this as, it is the only other logical explanation, as, your O2 sensors haven't coughed up a code. It is VERY possible your engine is not burning all of the gas being sprayed into the cylinder housing and it is going down your exhaust, then entering your catalytic converter and being burned off as excess. This will not give you an error code because your O2 sensors are burning off the extra gas, which means they are working properly.

I would verify all aspects of the engine firing when it is supposed to be( engines were much easier to work on when you had a distributor cap, distributor, etc... you could check your timing by simply loosening your distributor cap and giving it a small turn then hitting the accelerator and listening for any lag or latency, then you could turn it to where every time you just bumped the accelerator it would make the engine jump).

I know this is a lot of detailed info and, without being able to put my hands on it physically, puts us both at a handicap.

It is possible to have a diagnostics run via Auto Zone or Advanced Auto Parts and this may give you your answer. Personally, I think your timing is off( yes, this can occur even with EFI systems) and it needs to be observed and possibly reset\replaced.

Hope this helps.

Aug 18, 2017 | Dodge Cars & Trucks

1 Answer

When I drive it it won t catch up speed,and when I pull up to a light It jerk a little and when I get ready to pull off the car kinda slow then it slowly catc up burn a lot of gas.

Dirty air filter? Fuel filter? It could just need a tune up- new spark plugs, plug wires, distributor cap (if equipped) and rotor (the thing under the cap that sits on top of the distributor's center shaft).

Is your service engine soon light on while driving? That means there is a trouble code stored which may pinpoint the problem. Autozone and others do code scans for free-as long as the car is made after 1996. There may be a code even if the light is not on, so have it checked. Post back if your car is made before 1996, and I can help you with that.

Oct 04, 2014 | Cars & Trucks

2 Answers

How do I fix a P1762

Check hoses around your gas tank. We had to replace all of mine even after a new gas cap was put on.

Sep 14, 2014 | 2003 Jeep Grand Cherokee

1 Answer

My ford explorer sport trac 2001 shows codes 455 and 457, check engine on

P0455 most likely means one or more of the following has happened:
A loose or improperly affixed gas cap
A non-conforming gas cap (i.e. not factory/original brand)
Other leak or damaged piece in EVAP system

Possible Solutions:
With a P0455, the most common repair is to:
Remove and reinstall the gas cap, clear the codes, and drive for a day and see if the codes come back.
Otherwise, replace the gas cap, and/or Inspect the EVAP system for cuts/holes in tubes/hoses (you may hear a vacuum noise or smell fuel), repair if necessary.

P0457 can set by itself if the gas cap is left loose. when the engine controller sees a large increase in fuel level it knows you put some in the tank, and it runs the evaporative emissions system test to see if the system is sealed. If it sees a large leak it knows the cap was left off and sets the P0457. If you are positive the cap wasn't left even a little bit loose you may have a leak back there. It could be in the filler neck, from the tank to the evaporative emissions canisters, and from there on up to the purge solenoid. If you don't see any leaks you probably have a bad NVLD, the unit that checks the system for leaks.

Sep 16, 2012 | 2001 Ford Explorer Sport Trac

1 Answer

Diag codes for trouble shooting po141,po404,po440

Code 141 is the O2 (oxygen sensor) gone bad, needs replacing.
Code 440, 442 and 445 are all in the EES (Evaporative Emission System). They are leaks in the PCM (Powertrain Control Module). It tests this system when there is about one fourth tank of gas left.
This system controls fumes from the fuel by storing it in a vapor canister until they can be burned off. This system has several parts in it. You have the solenoid (which is a vent valve and a purge valve), fuel tank, a vapor canister, and you have lines coming from engine vacuum port, going to the vent valve. But you may want to check your gas cap. This is the culprit most of the time. As we take it off and on, it can cause leaks. This is also the cheapest solution. You'll have to clear your code with an OBD scan tool, to see if it was repaired by replacing your gas cap.
Also older vehicles can have a leak around the fuel filler neck where the gas cap attaches to is a seal and it could have gone bad.
A lot of times that seal is leaking around that filler neck. So more likely than not, it is leaking and/or gas cap needs replacing.
A 403, 404,405 are in the EGR System.
401 and 402 are the EGR valve.
You will get these codes because the PCM has sent them. It will send them to test the system as part of a self-diagnostic test and the other reason it sends it is because it wants to monitor the EGR system through everyday, normal operations.
This is what is known as PCM command. It is looking for correct signal of the wires to make sure they are working right from the solenoids in the EGR valve.
There is a problem in the EGR system that needs fixing. Sometimes replacing the EGR valve will fix the problem, but before you go out buying a lot of parts for your car, have a mechanic shop test the EGR system.
Good luck.

Aug 01, 2012 | 1999 Saturn SL

1 Answer

Did a tune up on my 91 dakota, but still burning lots of gas. change wires, sparkplugs, cap, rotor, and oxygensensor but still burning gas out the tail pipe

Try running fuel injector cleaner through the gas tank. A fuel injector might be stuck open, letting lots of fuel into the engine. Also try replacing your fuel pressure regulator, and inspect the fuel tank return lines.
Good luck

Jun 15, 2011 | 1991 Dodge Dakota

2 Answers

What does code pa455 mean for 2000 dodge dakota

emission control system leak (large). any leak in pressure in the system will set the code off,even a bad gas cap,or one left loose,so if you have a leak in the system that could be the cause of the code,good luck with it. p0455

Jun 04, 2010 | 2001 Dodge Dakota

3 Answers

Check Engine Light won't go off

If you have an Advance Auto Parts store where ever you are, they will read the code and tell you exactly what to code is and what it means. Any mechanic who "guesses" isn't a mechanic at all - he's a thief. Emissions leak can be any number of things, but not the gas cap!

Aug 21, 2009 | 2003 Dodge Caravan

2 Answers

Gascap light comes on everytime i start up the car

I had this similar problem but gascap and engine light on. I changed out the gas cap cleared codes and both were back o. Went to the dealer he insisted it was the after market gascap changed in and cleared the codes. Before I even left the lot they were both back on. Finally they found the problem they had to change out some kind of pump and canister and it fixed the problem.

Apr 21, 2009 | 2007 Chrysler Aspen 4x2

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