Question about 2004 Dodge Ram 1500

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Code po068 skipping bad dodge pickup 1500 with 4.7 year 2004

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HI. The power control module uses the throttle position,barometric pressure, intake air temperature, and engine rpm in order to calculate the predicted mass airflow rate. The PCM compares the predicted mass airflow value to the actual mass airflow value and the speed density calculation in order to verify the proper throttle operation. If the PCM detects that the difference between the actual air flow(MAF) and the speed density calculated air flow is greater than expected, the DTC will be set(P0068).

The necessary actions are to:

1. Inspect the throttle blade for broken, bent, or missing structural parts.
2. Inspect the TP sensor for proper installation. A mis aligned sensor will set this code.
3. Inspect the TAC module connectors for signs of water intrusions. When water infiltrates this module, multiple DTC codes mat be set with no DTC circuit or component conditions found during the diagnostic test.
4. Physically and visually inspect the throttle body assembly and correct any problems that you observe. Manually move the throttle blade form closed to wide open throttle. You should not need to use excessive force when doing this. The throttle blade should move smoothly through the full range and should return slightly to the open position on its own.
5.When the TAC module detects a condition within the TAC system, more than 1 TAC system related code may be set. This is due to the many redundant test that run continuously on this particular system. Locating and repairing one individual condition may correct more than one DTC(code). Disconnecting components during testing may set additional DTC(codes). Keep this in mind when you are reviewing the stored info, or captured info.

Posted on Jul 08, 2010

  • 3 more comments 
  • Michael Masters
    Michael Masters Jul 08, 2010

    P0068 MAP/MAF - Throttle Position Correlation

  • ohell1234 Jul 08, 2010

    I put new map sen on and changed plugs and it smells like rotten eggs

  • Michael Masters
    Michael Masters Jul 08, 2010

    I see. This will be the result of a failing catalytic converter. This device is blocked. The comb has collapsed. This is creating massive amounts of back pressure that is , essentially, choking out your cylinders. This will set many codes and damage your exhaust valves, if not corrected soon.Replace that CAT(s), asap.

  • Michael Masters
    Michael Masters Jul 08, 2010

    I would also replace the up and down stream O2 sensors, as well.

  • Michael Masters
    Michael Masters Jul 08, 2010


    • Additionally, check your battery for cracks or swollen structure. This is another area of concern, as well. I suspect the CAT, but it is always a rule of thumb to check the battery when you smell this sulfur additive.


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TPS...

Not something to do without scanning your OBD CODES.

If it still drives ...
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http://www.rockauto.com/en/catalog/dodge,2004,ram+1500+pickup,5.7l+v8,1424630,electrical-connector,throttle+position+sensor+(tps)+connector,2624

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My sincere apologies for the delayed response.
I am personally going back to answer your unanswered questions.

I do not know if you still need this information, but I am going ahead and answering it anyway. You may want to Print the Diagrams for future use.

CLICK
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If you would: Before Clicking: Let me know if this helped you, or if you have any additional information or questions. Feel Free to contact me at FixYa.com!
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Thanks!

http://www.2carpros.com/car_repair_information/year/2004/make/dodge/model/pickup/2004_dodge_pickup_drive_belt_routing_diagram.htm

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