1999 dodge ram 1500 2wd 5.2L gives different intermittent codes

Tune up, coils and wires.

Code 15 relates to a failure in the vehicle speed sensor circuit. The job of the vehicle speed sensor is to inform the computer about the speed of the vehicle so the computer can calculate engine load and prepare the engine idle speed control system while the vehicle is decelerating. On deceleration, the idle speed control system will allow additional air flow into the engine as the vehicle rolls to a stop. Usually code 15 will be accompanied by erratic speedometer readings (or no reading), erratic AT gear shifting, TCC lockup clutch instability, and intermittent or complete failure of the cruise control.

there is a total of 27 diagnostic steps to follow, but here is some info for you:
SYMPTOM
P1740-TCC O/D SOL PERFORMANCE

WHEN MONITORED
The Torque Convertor Clutch (TCC) and Overdrive Clutch (O/D) will be tested each time the PCM requests TCC engagement in 3rd gear and O/D.

SET CONDITION
The code 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
- Camshaft DTC present
- Engine RPM DTC present
- Fuel level low
- Misfire DTC present
- Output speed DTC present
- P1765 DTC present
- Park/Neutral DTC present
- PTO engaged (if equipped)
- Torque converter clutch DTC present
- TPS DTC present
- Transfer case in low range (if equipped)
- Transmission Relay DTC present
- Transmission temperature too cold
- Intermittent
- Check transmission fluid-debris
- Check transmission fluid-stall
- 3-4 Shift Solenoid
- Oil Pan contains excessive debris
- Shaft or seal damage
- TCC solenoid
- Torque converter
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I believe that there is an electronic relay between the ignition switch and the solenoid on the starter that is causing your intermittent starting problem.

SYMPTOM
P1740-TCC O/D SOL PERFORMANCE

WHEN MONITORED
The Torque Convertor Clutch (TCC) and Overdrive Clutch (O/D) will be tested each time the PCM requests TCC engagement in 3rd gear and O/D.

SET CONDITION
The code 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


Camshaft DTC Present
Engine RPM DTC present
Fuel level low
Misfire DTC present
Output speed DTC present
P1765 DTC present
Park/neutral DTC present
PTO engaged (if equipped)
Torque converter clutch DTC present
TPS DTC present
Transfer case in low range (if equipped)
Transmission relay DTC present
Transmission temperature too cold
Intermittent
Check transmission fluid-debris
Check transmission fluid-stall
3-4 shift solenoid
Oil pan contains excessive debris
Shaft or seal damage
TCC solenoid
Torque converter

its located on the left rear side of the engine block near the base of the oil dipstick tube and starter

The Engine Control Unit continuously receives information from sensors on the cam and crank shafts. This code indicates that there was an intermittent loss of signal from one or other of these sensors due to a sensor fault or a loose connection. If the fault persists the ECU will loose track of the relative position of the crank and cam and this will give rise to erratic engine firing. Try thoroughly cleaning the contacts within the electrical connectors to these sensors and see if this resolves the issue.

you need to replace the starter before it leaves you sitting stranded somwhere. intermittent problems with the starter means most of the time the starter is going out. for futher help call 419 689 1114 and i will be happy to assist you.

the best advice i can give you is bring it into a warm garage and let it heat up, then treat your fuel with anti gel solution run it through your injectors by running engine and this should not happen again, seems like your lines are gelled up and you don't have proper pressure.

Do you have engine code showing by chance? It's possible the crank sensor is bad or the connection to the ecm or pcm to the instrument cluster circuit board needs a look. If you need schematics check out www.promanuals.net they specialize in Dodge Ram service manuals.