Last post on Jun 21, 2013 at 5:47 PM
You are in the Dodge Dakota-2010 and older
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Dodge Dakota, Truck
#62 of 123 Check Engine light
Oct 09, 2008 (11:23 am)
I have a 2005 Dodge Dakota with a 3.7 6cylinder engine with 38,000 miles on it.
About 14 months ago I got the same code p0302 saying miss fire on cylinder #2 the dealer inspected and found nothing and cleared the code. This Sunday the check egine light came on again and I had the codes scanned again I got P0302 code,so with 38,000 mile I decided to change the spark plugs with the original type,after I was finished the codes went away and the next day the check engine light came back on with the same P0302 cose miss fire on # 2 cyclinder. The performance is fine,but I am at my witts end on what the problem might be.
I would appreciate any insight on this question.
#63 of 123 Check Engine Light
Oct 09, 2008 (3:35 pm)
I wonder if your problem might not be with the Coil on plug (COP) for cylinder # 2. Might be worthwhile to switch the COP with another one and see if that makes a difference.
#64 of 123 Re: PO432, PO455 [cindy215]
Dec 10, 2008 (8:00 pm)
Hiya, it's probably your gascap. Re-insert your gascap and click it and the light should go off in a couple of trips.
#65 of 123 Re: Check Engine light [treedav]
Dec 10, 2008 (8:04 pm)
Hi I have a 2000 dakota with the same problem..except P0306, our mechanic swapped the coil packs on a tune up and it didn't matter the light came back on. We think it is a bad injector as it seems to happen to us when we are lower on fuel. For now we put in some fuel injector cleaner, add some gas, and the light goes off.
Dec 12, 2008 (2:05 pm)
Not sure if this is the correct thread for my 03 Ram with a hemi.
I recently had my fuel pump replaced and I now have this DTC, P0440 Evap Sys Perf.
What should I be looking for. The truck is out of warranty and hopefully I can find a quick fix.
#68 of 123 Engine code PO420
Jan 08, 2009 (4:14 pm)
I have a 99 Dakota 2 WD with 90,00 on the clock. I have been battling a Check Engine Light for several weeks. I can reset it, but it comes back on in less than 50 miles. I have had it to the shop and they have replaced the cat and both O2 sensors. The plugs, wires, cap, and rotor are less that a year old. I have even replaced the gas cap. I am at the end of my rope. A new truck is looking better and better. HELP PLEASE!
#69 of 123 What bank?
Jan 08, 2009 (4:18 pm)
I meant to add this to my question. What bank is BANK 1? The code reader I used mentioned bank 1. Is it the right or left from inside the truck?
#70 of 123 Re: Engine code PO420 [gerry99]
Jan 10, 2009 (10:11 am)
This a V8 engine, correct?
P-420 = Catalyst System Efficiency Below Threshold (Bank 1)
A P-420 is triggered when the PCM detects an out-of-range difference between the upstream and downstream oxygen sensors.
The engine could be suffering from a performance problem. You've changed the ignition components. What about the PCV valve and the air filter? Vacuum leaks?
You could have a bad PCM (or was it an ECM in '99?).
#71 of 123 PO420 code
Jan 11, 2009 (6:21 pm)
Thanks for the reply. The motor is a V6. I should know better. Like I said, both O2 sensors were replaced because the machanic mentioned what you did with the reading going into the cat and that coming out. I'll pick up a PVC valve this week and give it a shot. The air filter is almost new. Is there another filter someplace that I could change. The filter in the tank is good or so I was told. The fuel pressure is 80 PSI on the rail. He hooked up a guage close to the master cylinder by the firewall. Where is the ECM? Any idea about the, "Number 1 Bank?" Right or left side from inside the car?
Thanks again. I owe you a beer.