P1451 Code???

[NStates]

The check engine light came on while driving on the interstate 70 mph. no load. The code read out was P1451 --2580. What is it telling me. Does this mean a trip to the dealer or can it be reset some way?



Norm



2008 Dodge RAM 3500 Laramie Quad Cab 4X2



6. 7 Liter Cummins (R) Turbo Diesel Engine, 6 -Speed Automatic 68RFE Transmission, 3. 73 Anti-Spin Differential, Brilliant White, ISSPRO Gauges, Transfer Flow Fuel Tank, PullRite #20,500 Super 5th Hitch, Line-X, XTRA Bed liner , Hayes Genesis brake controller, PML Deep Transmission Pan, Custom Graphics, Pull a Mobile Suites Fifth Wheel.

 

[dlmetzger]

Was the '2580' actually 'P2580'? If so, then I have both DTCs.

I recently had P2580. My Turbo speed sensor was bad and I continued to drive it with no problems until the truck de-rated itself (after about 300 miles). I could barely climb a hill. The sensor was replaced under warranty and everything went was back to normal.



See DTCs below:





P1451-DIESEL PARTICULATE FILTER SYSTEM PERFORMANCE

For a complete wiring diagram Refer to Section 8W.



Theory of Operation





The engine Exhaust system monitors the soot load in the Aftertreatment diesel particulate filter. Under normal operating conditions the Aftertreatment diesel particulate filter is self-cleaning, where accumulated soot is converted to ash. Under light load operating conditions, the driver may be notified via the vehicle's EVIC message center ("CATALYST FULL: SEE OWNERS MAN" message will be displayed) that it is necessary to modify the vehicles driving routine/duty-cycle (see Owner's Manual for details) in order to allow the Aftertreatment diesel particulate filter system to self clean. If the vehicle's EVIC message center notification is ignored, the vehicle will eventually derate the engine and set a fault, requiring service. The soot load in the Aftertreatment diesel particulate filter is estimated by the ECM using the Exhaust Pressure Sensor values and the calculated soot output of the engine. This fault code will be triggered if the application is not operating at a duty cycle high enough to allow active regeneration of the Aftertreatment diesel particulate filter. This fault code is an indication that the exhaust temperatures exiting the turbocharger are not high enough to allow active regeneration of the soot that is trapped in the Aftertreatment diesel particulate filter. It may be necessary to increase the duty cycle of the application in order to prevent excessive soot accumulation and plugging of the Aftertreatment diesel particulate filter. The ECM will set this fault if it detects that the soot level has exceeded the normal desoot trigger threshold by a sufficient amount to indicate that the driver intervention is required. There is not a MIL lamp associated with this fault code, though the driver will be notified via the EVIC message.





Possible Causes



ENGINE HAS BEEN OPERATING IN LIGHT LOAD CONDITIONS THAT PREVENT EXHAUST TEMPERATURES FROM BEING HIGH ENOUGH TO ACTIVELY REGENERATE THE AFTERTREATMENT PARTICULATE FILTER



PROGRESSIVE DAMAGE TO THE AFTERTREATMENT SYSTEM FROM AN ENGINE FAILURE, INCLUDING BUT NOT LIMITED TO EXCESSIVE FUEL, OIL OR COOLANT IN THE AFTERTREATMENT SYSTEM



EXHAUST LEAK PREVENTING DIESEL PARTICULATE FILTER REGENERATION TEMPERATURES FROM BEING ACHIEVED





P2580-TURBOCHARGER SPEED SENSOR CIRCUIT LOW



Theory of Operation





The turbocharger speed sensor is a variable reluctance speed sensor. It consists of a coil of wire and an iron core. The target on the turbocharger shaft is a ground flat in the center of the shaft. As the flat on the turbocharger shaft spins past the speed sensor, a signal is generated. The ECM interprets this signal and converts it to a turbocharger speed reading. If this fault becomes active the ECM will light the MIL light immediately. During this time the ECM uses an estimated turbocharger speed. An engine power derate may be experienced. The ECM turns off the MIL when the diagnostic runs and passes in 4 consecutive drive cycles.



When Monitored:

When the key is on and the ECM detects a valid turbocharger speed.



Set Condition:

ECM detects turbocharger speed detected is less than a calibration limit for a calibratable amount of time.





Possible Causes



ECM GROUNDS



(K540) TURBO SPEED SIGNAL CIRCUIT SHORTED TO OTHER CIRCUITS



(K540) TURBO SPEED SIGNAL CIRCUIT SHORTED TO GROUND



(K540) TURBO SPEED SIGNAL CIRCUIT OPEN



(A209) FUSED B+ CIRCUIT



TURBOCHARGER SPEED SENSOR

 

[NStates]

Thanks,
Will have it checked.

Norm

 

[HBarlow]

Are you pulling your fifth wheel with it?

If you were regularly towing a heavy fifth wheel like in your signature I'm puzzled why you would have that code set.

 

[NStates]

This summer I pulled the fifth wheel only about 2,500 miles to date. But my other travels have been sightseeing trips of 50 to 100 miles average. Some shorter trips to towns and etc. Nothing like if I was using the truck for work or service calls. I use expressway exclusively where possible. This Saturday the code came up on the way back from a 60 mile one way trip of 65-70 mph. While returning home the code came on while running 70 mph for about 45 minutes. I had the regeneration message come on twice this summer and extended my driving on both occasions at a good speed until it was finished. I would appear to me that there is some problem with the system as I do not know how it would work as a service vehicle or for someone who drives 10 to 15 miles to work. When I tow I run with the traffic (usually between 60 & 75) and use the exhaust brake when towing. I usually use Flying -J fuel which as a higher cetane rating than the average diesel.
Will make an appointment tomorrow and see what needs done. Must get it fixed as within a week I will be making a trip to upper Quebec and no time to mess with truck.

Thanks
Norm

2008 Dodge RAM 3500 Laramie Quad Cab 4X2

6. 7 Liter Cummins (R) Turbo Diesel Engine, 6 -Speed Automatic 68RFE Transmission, 3. 73 Anti-Spin Differential, Brilliant White, ISSPRO Gauges, Transfer Flow Fuel Tank, PullRite #20,500 Super 5th Hitch, Line-X, XTRA Bed liner , Hayes Genesis brake controller, PML Deep Transmission Pan, Custom Graphics, Pull a Mobile Suites Fifth Wheel.

 

[KLauber]

How many miles on the truck? Dually I assume? Use that EB all the time, sounds cool and saves on brake wear! Keep us posted , I have an 08 also... .

 

[NStates]

Single wheel. Had two dually's prior and like this one very well for towing. 58,000 on the truck. Great truck just have reservations on the emissions system.

 

[CPavlic]

Pretty common to have the turbo speed sensor code set, just needs to be replaced. As for 1451, its set when the soot load gets to 56 grams, NOT turning the cel on, just letting you know over head that a regen is required, as dlmetzger stated above. Once you drive the truck and get it to perform regin, the code will go stored once the soot load drops

 

[NStates]

They had to replace the turbo speed sensor. Lucky it was all covered under warranty.

Thanks

2008 Dodge RAM 3500 Laramie Quad Cab 4X2

6. 7 Liter Cummins (R) Turbo Diesel Engine, 6 -Speed Automatic 68RFE Transmission, 3. 73 Anti-Spin Differential, Brilliant White, ISSPRO Gauges, Transfer Flow Fuel Tank, PullRite #20,500 Super 5th Hitch, Line-X, XTRA Bed liner , Hayes Genesis brake controller, PML Deep Transmission Pan, Custom Graphics, Pull a Mobile Suites Fifth Wheel.

 

[ceomall]

I just had a CEL come on Sunday. The dealer pulled codes P242F and P1451 and per TSB 11-001-09, replaced the DPF and cleaned the EGR saying my DPF was full and I was idling too much. Prior to that the only problem was a CEL about 6 months ago on a bad exhaust sensor.



I only have 12k miles on it since buying it new in 08 and been pulling a 6k lbs travel trailer with it for about 1/3 of that. Otherwise I have about a 20 min drive to work on either in town or highway @ about 70mph depending on which is flowing that morning or if I need to stop for a breakfast burrito so that is about the most idling I do!



Hopefully the latest program I got a few monts ago will help the new DPF last a little longer next time.



Love the truck, just hope the emissions love me back.