MAP/TP Correlation

[DrX]

I am experiencing MAP/TP Correlation issues at high RPM/MAP that put me into REP mode at WOT in boost. I suspect table C3003 but the max allowed value is only 105 kPa. This won't work with boost if I am reading it correctly. C5501 is set to 2000 RPM. Any suggestions?

[SinisterSS]

Increasing C6101 by 100% over stock will get you in the ballpark.

[DrX]

C6101 is already 200% over stock. The DTC I am seeing is P0068.

[ringram]

What was the fix dude?

[DrX]

Only MAP/MAF-related change that I made was to bump up B0120 to well above the highest RPM I will reach as I have no MAF. Guess it hasn't been an issue since.

If the MAF is still online, then the TB also needs to be checked out.

[64camino]

I know, back from the dead. I just started randomly experiencing this problem today after not touching the tune for months. Scared the heck out of me cause when it did it it backfired under wot and died, and was in limp mode when i refired it. Did bumping up B0120 fix the issue for good? I have not had a chance to mess with it yet(work) but decided to try to at least research it. Thanks in advance

Mike

[DrX]

I know, back from the dead. I just started randomly experiencing this problem today after not touching the tune for months. Scared the heck out of me cause when it did it it backfired under wot and died, and was in limp mode when i refired it. Did bumping up B0120 fix the issue for good? I have not had a chance to mess with it yet(work) but decided to try to at least research it. Thanks in advance

Mike

I haven't had any issues since.

What DTC's were set in your case? Electronic throttle? SD tune?

[64camino]

Only dtc is P0068. Yes it is ETC and a speed density tune. I don't get why it would just randomly start:confused:

[DrX]

Could be a sticky throttle blade or MAP sensor issue. From the service manual:


Diagnostic Aids (http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1252433&evc=sm&pubid=564&cellId=122679&mspsdsubkey=2793#ss4-1252433)


Inspect the throttle blade for being broken, bent, or missing.
Inspect the TP sensor for proper installation. A sensor that is mis-aligned could set this DTC.
Inspect the throttle actuator control (TAC) module connectors for signs of water intrusion. If water intrusion occurs, multiple DTCs may set without any circuit or component conditions found during diagnostic testing.
Physically and visually inspect the throttle body assembly and correct any problems that you observe. Manually move the throttle blade from closed to wide open throttle (WOT). You should not need to use excess force. The throttle blade should move smoothly through the full range, then should independently return to a slightly open position.
When the TAC module detects a condition within the TAC system, more than one TAC system related DTC may set. This is due to the many redundant tests run continuously on this system. Locating and repairing one individual condition may correct more than one DTC. Disconnecting components during testing may set additional DTCs. Remember this if you review the stored information in Capture Info.
For an intermittent condition, refer to Intermittent Conditions (http://127.0.0.1:9001/servlets/CellHandler?CellId=30126&RefDoc=1252433&evc=sm) .
Test Description


The numbers below refer to the step numbers on the diagnostic table.

5. This step will determine if the manifold absolute pressure (MAP) sensor voltage is within the proper range at idle.


6. This step will determine if the MAP sensor responds properly to the change in manifold pressure.


7. A throttle blade that sticks or binds may set this code. Opening the throttle through the entire range will indicate problems such as these.

9. When the PCM detects a condition within the ETC system other DTCs may set due to the many redundant tests run continuously on this system. Locating and repairing one individual condition may correct more than one DTC. Keep this in mind when reviewing captured DTC info.