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TessC

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Discussion starter · #1 ·
My 2000 Dodge Durango 4.7l has been having a myriad of problems, and I'm starting to reach the point where I'm either not sure what to try next, or thinking the best solution might to just sell the thing.

It all started with an injector code I want to say p0202? Truck was running fine but I figured it'd been a while since I replaced the injectors so might as well swap them all out. I ordered them from Amazon (I know, hit or miss) and immediately had several other codes pop up. The first were all related to cylinder one, wiring to the coil which was fixed by just reconnecting the cable, then p0201, fixed by swapping back to an old injector. Next was a lean fuel code on bank one (p0172?) so I replaced all the injectors on bank one back to the old injectors, didn't fix the issue. So I replaced the upstream O2 sensor, fixed the lean fuel code, but now throws a p0132, open circuit to the O2 sensor, as well as misfiring on all even cylinders. Okay let's try replacing these injectors again, I ordered some from a reputable source, replaced the spark plugs while I was at it, and cleaned off the MAP sensor.

That's where we're at now throwing p0202, and still throwing p0132 (along with an ignition code because my alternator has now decided to kick the bucket, can't have even one day of peace!) my current thought is to replace the downstream O2 sensor, then the MAP, then the PCM if we get to that point. Should I try something else? And at this point I'm already $600 down and the thing is only worth $1500 so I'm not even sure if it's worth continuing to chase
 
#2 ·
TessC said:
My 2000 Dodge Durango 4.7l has been having a myriad of problems, and I'm starting to reach the point where I'm either not sure what to try next, or thinking the best solution might to just sell the thing.

It all started with an injector code I want to say p0202? Truck was running fine but I figured it'd been a while since I replaced the injectors so might as well swap them all out. I ordered them from Amazon (I know, hit or miss) and immediately had several other codes pop up. The first were all related to cylinder one, wiring to the coil which was fixed by just reconnecting the cable, then p0201, fixed by swapping back to an old injector. Next was a lean fuel code on bank one (p0172?) so I replaced all the injectors on bank one back to the old injectors, didn't fix the issue. So I replaced the upstream O2 sensor, fixed the lean fuel code, but now throws a p0132, open circuit to the O2 sensor, as well as misfiring on all even cylinders. Okay let's try replacing these injectors again, I ordered some from a reputable source, replaced the spark plugs while I was at it, and cleaned off the MAP sensor.

That's where we're at now throwing p0202, and still throwing p0132 (along with an ignition code because my alternator has now decided to kick the bucket, can't have even one day of peace!) my current thought is to replace the downstream O2 sensor, then the MAP, then the PCM if we get to that point. Should I try something else? And at this point I'm already $600 down and the thing is only worth $1500 so I'm not even sure if it's worth continuing to chase
Click to expand...
Just an idea.... I have one of those FIXD Car Scanner OBD2 Code Reader gizmos that plugs into your to give you all kinds of vehicle information & stats... including WHAT your code actually mean and does. Gotta be way cheaper than the hit & miss method you are using and a lot less never racking I would guess.
 
Discussion starter · #3 ·
BEARCAT said:
Just an idea.... I have one of those FIXD Car Scanner OBD2 Code Reader gizmos that plugs into your to give you all kinds of vehicle information & stats... including WHAT your code actually mean and does. Gotta be way cheaper than the hit & miss method you are using and a lot less never racking I would guess.
Click to expand...
My guesses haven't been random, I've been looking up the recommended fixes for each code as they pop up. Sounds like I might be able to get my hands on one of those later this week though, might give some extra info, fingers crossed
 
#4 ·
TessC said:
My guesses haven't been random, I've been looking up the recommended fixes for each code as they pop up. Sounds like I might be able to get my hands on one of those later this week though, might give some extra info, fingers crossed
Click to expand...
Looking up and being diagnosed are separate. If your using a code reader, yeah, that just tells you what the error codes are and then you need to look those up. The FIXD does both and more in one shot. I've saved a LOT of time and effort and cost with mine. Good luck working through your issues. I'm not electrical beyond amps, + & - so those troubleshoots are sometimes just not worth my while. Unfortunately they are costly at a garage.
 
#5 ·
Well P0202 would be cylinder 2 and code saying open circuit to fuel injector. So first you should've checked for any evidence of a wire issue, chafing, cracked or corroded connector. If that all looks good, then you want to check resistance of the injector and I would compare it to other ones to see if the value is off. They should all be similar. If injector 2 is higher than the ones next to it, then you could assume you just have an injector issue.
Injectors don't all fail, and often will last the lifetime of the vehicle, so as you noted, buying from Amazon not only can be hit or miss, but you must get the right injector. Too large can cause issues as can too small....and both can then cause O2 sensor issues.
I'd backtrack to the OEM parts and start over.
 
Discussion starter · #6 ·
The most recent injectors I put in are OEM and I checked all the wiring and resistances. All seems good. I'm still having the O2 code though. Would you recommend I move on to replacing the downstream O2 sensor?
Chase300 said:
Well P0202 would be cylinder 2 and code saying open circuit to fuel injector. So first you should've checked for any evidence of a wire issue, chafing, cracked or corroded connector. If that all looks good, then you want to check resistance of the injector and I would compare it to other ones to see if the value is off. They should all be similar. If injector 2 is higher than the ones next to it, then you could assume you just have an injector issue.
Injectors don't all fail, and often will last the lifetime of the vehicle, so as you noted, buying from Amazon not only can be hit or miss, but you must get the right injector. Too large can cause issues as can too small....and both can then cause O2 sensor issues.
I'd backtrack to the OEM parts and start over.
Click to expand...
The most recent injectors I put in are OEM and I checked all the wiring and resistances. All seems good. I'm still having the O2 code though. Would you recommend I move on to replacing the downstream O2 sensor?
 
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