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Discussion Starter #1
PO219, PO191, P1740. I know what they are. The p1740 i get pretty often, but the first two codes i've never seen. I have a 114,000 on the odometer. What is "egine overspeed" how does that happen? and also "fuel rail pressure range/performance". Why did did these codes set and how do I fix it? oh and truck runs fine!
 

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P1740-TCC O/D SOL PERFORMANCE (DIESEL)

Theory of Operation


The Torque Converter Clutch (TCC) Solenoid is used to engage the TCC which improves fuel economy.



When Monitored:
The Torque Convertor Clutch (TCC) and Overdrive Clutch (O/D) will be tested each time the ECM requests TCC engagement in 3rd gear and O/D.

Set Condition:
The DTC will set if the expected RPM drop is not achieved while attempting to engage TCC or O/D. This indicates a malfunctioning torque convertor or overdrive clutch.


Possible Causes

ENGINE DTCS PRESENT

TRANSMISSION DTCS PRESENT

TRANSMISSION TEMPERATURE TOO COLD

OIL PAN CONTAINS EXCESSIVE DEBRIS

3-4 SHIFT SOLENOID

SHAFT OR SEAL DAMAGE

TCC SOLENOID

TORQUE CONVERTER

They might all be related to this.
 

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Discussion Starter #3
bump.......
 
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