It looses power on the highway all of a sudden but it comes right back After the check engine lite came on it seemed to run better. Ran the codes and came up with p0351 andp0420.
I just had both of these codes for my 98 dodge dakota 3.9 v6. A year I've had this, multiple mechanics had no idea. I moved this truck from TX to CO, about a month after replacing my Cat here my truck would stall and eventually get these codes. Replaced plugs, ignition coil, wires etc for a basic tune up but no resolve.
What fixed it? The right gas. I've always given cheap 85 to cheap economy vehicles, I knew this didn't need 91 so I didn't bother to look it up since 87 shouldn't matter, right? Wrong! Dropped some 104 octane in the tank and the issue almost stopped completely, my next tank I ran 91 and never had a stutter. Dropped it back to 87 (what it's supposed to run) and I've had it stall out only once with immediate recovery. I do have a leaking intake manifold gasket I need to replace so perhaps the ECU's ability to tolerate a lesser octane is compromised but one thing's for sure: running 85 makes the truck stall and signals p0351 and p0420, it'll stall and possibly backfire.
You can check here and tells you what these codes mean www.obd-codes.com
SOURCE: What is engine code 0351 mean? Or perhaps it is P0351
you are having an issue with ignition coil. the only solution is to replace usually fairly inexspensive
SOURCE: Engine codes P0354 P0351 engine skips low power
These codes are for a malfunctioning ignition coil/s.
P0351= ignition coil A primary/secondary circuit malfunction.
P0354= ignition coil D primary/secondary circuit malfunction.
visually check the coil packs for burn marks, damage, loose wire connectors, and the wire harness to each of the coils for damage. How long has this been happening? Has any work been done recently? Did the engine compartment recently get wet?
SOURCE: Check engine light
A multi misfire may mean that one or more of the following has happened:
Faulty spark plug or wires, Faulty coil (pack), Faulty oxygen sensor(s), Faulty fuel injector(s), Stuck/blocked EGR valve / passages, Faulty camshaft position sensor, Defective computer.
The engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wire, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the the problems were faulty fuel injectors.
Random misfires that jump around from one cylinder to another (read: P030x codes) also will set a P0300 code. The underlying cause is often a lean fuel condition, which may be due to a vacuum leak in the intake manifold or unmetered air getting past the airflow sensor, or an EGR valve that is stuck open.
Good luck and hope this information helps, keep me posted, be glad to help you get the truck running 100% again. Not sure if your running a K&N air filter, and if you are there may be a flim of oil on the MAF sensor that is making you run lean. You may want to spray down the MAF sensor with a can of MAF cleaner.
SOURCE: code papa 1391 misfire ( check eng lite on)& blower motor hi only
P1391 TROUBLE CODE IS INTERMITTENT LOSS OF CAM OR CRANK SIGNAL..WHAT SIZE ENGINE IN YOUR CAR?2.7/3.2/3.5?SOME MORE INFO WOULD HELP..ALSO YOUR HEATER FAN PROBLEM SOUNDS LIKE A FAULTY HEATER RESISTOR..PICK UP A NEW ONE..FAIRLY INEXPENSIVE..LOCATED IN HEATER HOUSING ON RIGHT SIDE UP UNDER DASH..IF YOUR NOT SURE HOW TO REPLACE..CONSULT A PROFESSIONAL..
SOURCE: Check engine light , trouble code 34
Your truck is OBD2 compliant take it to a local auto parts store and have them read the code for you they usually do this as a free service, if it doesn't have a obd2 port then your truck is not a 1996 vehicle.
If an open or a short is detected in the driver circuit for coil number 1, a P0351 may set. Also, depending on the vehicle, the PCM may also shut down the fuel injector to the cylinder also.
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