Templars83
New Member
- Joined
- Oct 6, 2020
- Messages
- 1
- Reaction score
- 0
- Points
- 1
- Location
- Nashville
- Vehicle Year
- 2000
- Make / Model
- Ford Ranger
- Transmission
- Manual
Forgive the long post - thank you.
Thank you for accepting my request to join the forum. I am at my wits end over a long standing problem I'm having with my 2000 2.5 5speed Ranger, that has served me very well. I have been getting a persistent check engine light over emissions. As a result I cannot pass emissions and my plate is now sitting at 2018, and has been parked quite a bite until recently.
Prior to all this it had been running very well, and was getting 25 mpg on an almost bullet proof engine. Plugs and coils were replaced before that as well as the fuel pump.
Out the blue, I started getting the CEL and forever since, I've been getting mostly emission codes such as EGR and EGR solenoid and others. I've changed the EGR valve, the EGR vacuum solenoid, and DPFE sensor. I have taken the upper intake manifold off and cleaned all the passages thoroughly. STILL the codes came. I recently was forced to drive it 1000 miles. The literally 10 mpg I had on that trip, has me determined to try ONCE again to resolve the issue.
Based on the latest codes:
P0133 O2 sensor Circuit Slow Response
P0401 - Exhaust Gas Recirculation Flow Insufficient (this is the code that hasn't gone away ever)
First thing I did was run a bypass hose from the EGR valve solenoid directly to the EGR valve WHILE running. It will stall it which tells me the flow is there and the Valve is opening - therefore no carbon issue in the intake manifold. This leads me to think bad DPFE sensor once again. I decided to do one more thing first. Knowing they hadn't been replaced in forever, I bought 2 Bosch O2 sensors and hoped this would help things especially with mileage.
After fighting one of the sensor's having to go through the fenderwell, I replaced them today (Amazon promised Friday - they came today - prime guarantees mean nothing. Additionally, I did a little vacuum test on the EGR valve which caused it to want to stall - thus clear flow there - where is this p0401 coming from forever?
Good pep at first - and the engine is running strong as it always has, even with all these issues. 40 miles later, CEL light is back and it's throwing these codes:
P0136 O2 Sensor Circuit (2 brand new Bosch sensors SO WHY AM I GETTING THIS)
P0401 Exhaust Gas Recirculation Flow Insufficient AGAIN
(Pending) P1131 O2 sensor related - possible lean condition and other things but O2 is first listed (SO i AM GOING LEAN VS RICH NOW???)
In the past, the engine was running rich for sure - thus the 10 mpg on that last trip. I could occasionally smell the gas.
So I am now thinking DPFE sensor or maybe the wiring is an issue from the O2 sensor - maybe - and will look at that tomorrow. It seems I am looking at 2 issues or maybe only one, and the very old O2 sensors weren't a problem afterall. I don't know what to do with the p0401 as I have changed everything about the emissions or just about. Perhaps I had a bad DPFE sensor part to begin with. Again, this is a long running issue that has me lost and frustrated.
Is there some sort of ECU reset or anything I am missing? Any ideas or thoughts would be greatly appreciated. Sorry for the long but informative post.
Craig
Thank you for accepting my request to join the forum. I am at my wits end over a long standing problem I'm having with my 2000 2.5 5speed Ranger, that has served me very well. I have been getting a persistent check engine light over emissions. As a result I cannot pass emissions and my plate is now sitting at 2018, and has been parked quite a bite until recently.
Prior to all this it had been running very well, and was getting 25 mpg on an almost bullet proof engine. Plugs and coils were replaced before that as well as the fuel pump.
Out the blue, I started getting the CEL and forever since, I've been getting mostly emission codes such as EGR and EGR solenoid and others. I've changed the EGR valve, the EGR vacuum solenoid, and DPFE sensor. I have taken the upper intake manifold off and cleaned all the passages thoroughly. STILL the codes came. I recently was forced to drive it 1000 miles. The literally 10 mpg I had on that trip, has me determined to try ONCE again to resolve the issue.
Based on the latest codes:
P0133 O2 sensor Circuit Slow Response
P0401 - Exhaust Gas Recirculation Flow Insufficient (this is the code that hasn't gone away ever)
First thing I did was run a bypass hose from the EGR valve solenoid directly to the EGR valve WHILE running. It will stall it which tells me the flow is there and the Valve is opening - therefore no carbon issue in the intake manifold. This leads me to think bad DPFE sensor once again. I decided to do one more thing first. Knowing they hadn't been replaced in forever, I bought 2 Bosch O2 sensors and hoped this would help things especially with mileage.
After fighting one of the sensor's having to go through the fenderwell, I replaced them today (Amazon promised Friday - they came today - prime guarantees mean nothing. Additionally, I did a little vacuum test on the EGR valve which caused it to want to stall - thus clear flow there - where is this p0401 coming from forever?
Good pep at first - and the engine is running strong as it always has, even with all these issues. 40 miles later, CEL light is back and it's throwing these codes:
P0136 O2 Sensor Circuit (2 brand new Bosch sensors SO WHY AM I GETTING THIS)
P0401 Exhaust Gas Recirculation Flow Insufficient AGAIN
(Pending) P1131 O2 sensor related - possible lean condition and other things but O2 is first listed (SO i AM GOING LEAN VS RICH NOW???)
In the past, the engine was running rich for sure - thus the 10 mpg on that last trip. I could occasionally smell the gas.
So I am now thinking DPFE sensor or maybe the wiring is an issue from the O2 sensor - maybe - and will look at that tomorrow. It seems I am looking at 2 issues or maybe only one, and the very old O2 sensors weren't a problem afterall. I don't know what to do with the p0401 as I have changed everything about the emissions or just about. Perhaps I had a bad DPFE sensor part to begin with. Again, this is a long running issue that has me lost and frustrated.
Is there some sort of ECU reset or anything I am missing? Any ideas or thoughts would be greatly appreciated. Sorry for the long but informative post.
Craig
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