P1753 Code Reoccuring

[06QCLB]

I'm getting the P1753 code (Transmission Throttle Valve Mechanical Performance) every 3-400 miles. It throws the truck into limp mode and won't shift out of first gear until 2500 rpms. I've already replaced the TTVA. From what I've read a few other people on here have had this problem, and they seem to think it is an electrical problem rather than a mechanical one. The truck also has a "hiccup start" problem that was reduced in frequency with new batteries, but still occurs, so there I have signs of another electrical issue that could possibly be related? Has anyone found a solution for a reoccurring P1753 even after replacing the TTVA?

 

[p-Bar]

Here is the info that AllData has for that issue:


P1753 TRANSMISSION THROTTLE VALVE MECHANICAL PERFORMANCE







Theory of Operation
The transmission throttle valve cable has been replace by the transmission throttle valve actuator (TTVA). The TTVA consists of an electric DC motor, two potentiometers, and a gear drive system. The TTVA is mechanically connected to the transmission throttle valve in the valve body by the "D" shaped opening in the bottom of the TTVA shaft.
The Transmission Throttle Valve Actuator (TTVA) does not require any mechanical adjustments. All changes in throttle valve position are controlled by the Engine Control Module (ECM).
The TTVA does require an initialization period after the actuator has been removed or replaced. After the actuator has been removed or replaced, move the ignition to the ON position for thirty (30) seconds . This will allow the ECM sufficient time to perform the internal calibration procedures to learn the TTVA's current "zero" position.

When Monitored
Ignition on, engine running in a valid forward gear with a throttle opening greater than 50% and the transmission in overdrive.

Set Condition
When the Governor pressure is below a minimum threshold when conditions indicate that the Governor pres sure should be high. This DTC indicates that the TTVA is working properly electronically but mechanically the output shaft is not moving the Throttle Valve in the transmission.

Possible Causes


BROKEN OR STRIPPED LINKAGE BETWEEN THE TTVA OUTPUT SHAFT AND THE THROTTLE VALVE
TRANSMISSION THROTTLE VALVE ACTUATOR
TRANSMISSION THROTTLE VALVE COMPONENTS
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.

Diagnostic Test


CHECK FOR GOVERNOR PRESSURE DTCS Ignition on, engine not running.
With the scan tool, check Engine DTCs.
Are there any Governor Pressure related DTCs present?
Yes >> Perform the appropriate symptom(s).
No >> Go To 2.


CHECK TTVA FOR SIGNS OF DAMAGE Turn the ignition off to the lock position.
Visually inspect the TTVA shaft for any signs of external damage or improperly mounted.

NOTE: It is not necessary to remove the TTVA to perform this procedure.

Is the TTVA damaged or improperly mounted?
Yes >> Repair as necessary
Perform RE TRANSMISSION VERIFICATION TEST VER-1 (DIESEL). See: Verification Tests\Transmission Verification Test\48RE Automatic Transmission - Diesel
No >> Go To 3.


CHECK IF TTVA SHAFT END IS DAMAGED Turn the ignition off to the lock position.
Remove the TTVA from the transmission.
Inspect the end of the TTVA shaft for cracks or damage.

NOTE: The end of the TTVA should be keyed or "D" shaped and fit tightly over the Throttle Valve shaft.

Is the end of the TTVA shaft undamaged and fit tightly over the Throttle Valve shaft?
Yes >> Go To 4.
No >> Inspect the Throttle Valve shaft on the transmission for free movement. If the Throttle valve does not move freely, inspect internal transmission components related to the Throttle Valve and replace as necessary Replace the TTVA in either case.
Perform RE TRANSMISSION VERIFICATION TEST VER-1 (DIESEL). See: Verification Tests\Transmission Verification Test\48RE Automatic Transmission - Diesel


CHECK THE TRANSMISSION THROTTLE VALVE ACTUATOR Properly support the TTVA to where the end of the shaft can be observed and reconnect the TTVA wiring harness.
NOTE: Each time the ignition is cycled to the on position, the ECM commands a TTVA internal calibration procedure (auto-zero) to determine the zero position. Do not press on the accelerator pedal during this test.

Ignition on, engine not running.
Observe the output shaft of the TTVA during the auto-zero procedure.
After completion of the auto-zero procedure, while observing the TTVA shaft, press the accelerator pedal to full throttle.
Does the TTVA internal motor move the TTVA shaft?
Yes >> Inspect the Throttle Valve shaft on the transmission for free movement. If the Throttle valve does not move freely, inspect internal transmission components related to the Throttle Valve and repair or replace as necessary.
Perform RE TRANSMISSION VERIFICATION TEST VER-1 (DIESEL). See: Verification Tests\Transmission Verification Test\48RE Automatic Transmission - Diesel
No >> Replace the TTVA.
Perform RE TRANSMISSION VERIFICATION TEST VER-1 (DIESEL). See: Verification Tests\Transmission Verification Test\48RE Automatic Transmission - Diesel


INTERMITTENT WIRING AND CONNECTORS The conditions necessary to set this DTC are not present at this time.
Using the schematics as a guide, visually inspect the related wiring harness. Look for any chafed, pierced, pinched, or partially broken wires.
Visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, or corroded terminals.
Wiggle the wiring and connectors while checking for any possible open or shorted circuits.
Check for any Service Information Tune-ups or Technical Service Bulletins that may apply.
Were there any problems found?
Yes >> Repair as necessary.
Perform RE TRANSMISSION VERIFICATION TEST VER-1 (DIESEL). See: Verification Tests\Transmission Verification Test\48RE Automatic Transmission - Diesel
No >> Test Complete.

 

[06QCLB]

Thanks. I know what the book calls for. Just wondering if anyone has had personal experience at solving this issue. Seems as if some on here have had trouble with this according to past threads.

 

[cerberusiam]

Have you replaced battery cables and\or ends? All manner of weird stuff happens when the cables corrode inside the sheathing.

Probably the hardest to find is the throttle valve components causing the code. The TV valve is highly suspect on a 48RE anyway and since you have intermittent issues a VB build with all the Sonnax fixes is probably where you want to go.