Need help with two trouble codes.

[Pirate4x4]

P0107 Manifold Absolute Pressure Sensor Low. Ok, so what the heck does this mean? I've recently had an Edge EZ installed, so what do I need to look for?



P01740 - I can't find any information on this code?



The check engine light came on about a week after I had the EZ installed. I took the truck to the local gas station to get the codes pulled. What is this 'turn the key xxx times' to get codes?



TIA,

Lance

 

[SRadke]

It sounds like your EZ has told the computer it has less boost that it's suppose to have so you got a low boost code. Just a guess.



-Scott

 

[rbattelle]

From the powertrain diagnostics manual:



P0107: Inlet air pressure sensure voltage too low.

Set condition: the circuit voltage to the ECM falls below a calibrated threshold for a certain period of time.

Possible Causes:

-Inlet air pressure sensor

-Inlet air sensor signal circuit shorted to the return circuit

-Signal circuit open

-Supply circuit open

-Signal circuit shorted to ground



Tests:

1. Disconnect the inlet air pressure sensor harness connector. Check/clean/replace the connectors as necessary. measure the voltage between the supply circuit and return circuits of the sensor harness connector. If voltage is between 4. 5 and 5. 5 volts, test passed. If not, supply voltage is too low.

2. While monitoring the OBDII port, use a jumper wire to connect the 5 volt supply circuit with the signal circuit at the sensor harness connector. If the OBDII port indicates pressure sensor is out of range high, replace the pressure sensor.

3. Disconnect the ECM harness connector and measure the resistance between the signal circuit and the return circuit in the inlet air pressure sensor harness connector. It must be greater than 100K Ohms.



There are several more tests, but they're mostly meant to eliminate a wiring problem. If you try these tests and come up negative, I can help further.



P1740: TCC O/D Sol Performance

When monitored: The Torque Converter Clutch and Overdrive Clutch 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.



There's a lot of tests for this, I won't go into here. If you want more I can give it to you.



Hope this helps!

 

[Pirate4x4]

Thanks! I called ATS regarding the torque converter error, and they said it's a CA truck problem. There's not much that can be done, other than setting my trans commander to lock up the TC at a higher speed.



Thanks for the help!

 

[Herman8r]

trouble code--p1740

pirate4x4--I just saw your post regarding the trans problem you had with the trans computer. Did changing the TC lockup speed eliminate the occurring trouble codes? I do not have the ATS controller--I have the EJAY controller--I think they be somewhat alike.



Herman

 

[John - K5AWO]

From the powertrain diagnostics manual:

P1740: TCC O/D Sol Performance

When monitored: The Torque Converter Clutch and Overdrive Clutch 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.



There's a lot of tests for this, ..... If you want more I can give it to you.

RBattelle,



Can you provide more of the details on this code. PJ pulled this code out of his transmission today. He is experiencing funny shifts.



He just discovered yesterday that the throttle valve cable to the transmission had been disconnected for a while. transmission was shifting at much lower spped points then, but smoothly. Now the shfit pattern is really messed up. He suspects the



shfit cable is not correctly adjusted.

 

[rbattelle]

RBattelle,



Can you provide more of the details on this code. PJ pulled this code out of his transmission today. He is experiencing funny shifts.



He just discovered yesterday that the throttle valve cable to the transmission had been disconnected for a while. transmission was shifting at much lower spped points then, but smoothly. Now the shfit pattern is really messed up. He suspects the



shfit cable is not correctly adjusted.

There are 4 full pages of diagnostic tests for this code! Here are the possible causes of the code:



PTO Engaged (if equipped)

Transmission temperature too cold

Fuel level low

Transfer case in low range (if equipped)

Check transmission fluid level

Check transmission fluid stall

Oil pan contains excessive debris

3-4 shift solenoid

Shaft or seal damage

TCC solenoid

Torque Converter

Intermittent wiring and connections



Notice that none of them discusses the shift cable adjustment. If you want the 4-pages of diagnostic information, PM me and I'll scan them for you. I'd rather not do so here for legal reasons.



(Sorry it took some time to get back here, but I was out of town)