2003 ram 2500 not running right - DODGE RAM FORUM - Ram Forums & Owners Club! - Ram Truck Forum
DODGE RAM FORUM - Ram Forums & Owners Club! - Ram Truck Forum

Go Back   DODGE RAM FORUM - Ram Forums & Owners Club! - Ram Truck Forum > Dodge Ram Forum - Mod Zone - Custom Dodge Ram Mods - Dodge Ram Performance > Custom Dodge Ram Performance Mods - Engine - Dodge Cummins Diesel

Custom Dodge Ram Performance Mods - Engine - Dodge Cummins Diesel Discuss modifying your Dodge Ram with Performance Parts and Accessories!

Vendor Highlight! - Check these guys out for great deals on Parts and Accessories!
Thread Tools
Old 01-16-2013, 07:44 PM
NorthernMopar NorthernMopar is offline
Dodge Ram Forum Newcomer
Join Date: Oct 2012
Location: Fort mcmurray Alberta
Age: 30
Posts: 9
Gender: Male
Vehicle: 2011 ram 2500 outdoorsman 4x4
Trim Level: outdoorsman
Color: brilliant black/charcoal metalic
Engine: 2009-20?? 345ci (5.7L) Hemi V8 390hp 407lb/ft
Rep Power: 0
NorthernMopar is on a distinguished road
Angry 2003 ram 2500 not running right

So my ram 2500 i picked up is not running right, rough idle seems to be missing, throwing codes P0107 and P0073 any one have any ideas seems to be burning rich at the tail pipe ?
Reply With Quote
Sponsored Links
Old 01-16-2013, 10:40 PM
Chunkem's Avatar
Chunkem Chunkem is offline
Dodge Ram Forum Senior Member

Join Date: Aug 2011
Location: Canada
Posts: 35,470
Gender: Male
Vehicle: 2013 Dodge Ram Longhorn
Trim Level: Longhorn Rambox
Color: Prairie Pearl / White Gold Trim
Rep Power: 28
Chunkem has a brilliant futureChunkem has a brilliant futureChunkem has a brilliant futureChunkem has a brilliant futureChunkem has a brilliant futureChunkem has a brilliant futureChunkem has a brilliant futureChunkem has a brilliant futureChunkem has a brilliant futureChunkem has a brilliant futureChunkem has a brilliant future

One of our talented members will have an answer for you.... Please keep us updated on how you make out.....
[CENTER][B][FONT=Arial Black][SIZE=2]Enjoy RamForumZ? Support your forum and become a[/SIZE][/FONT][FONT=Arial Black][SIZE=2][COLOR=#0066cc][URL="https://www.ramforumz.com/payments.php"] SITE SUPPORTER [/URL][/COLOR][/SIZE][/FONT][FONT=Arial Black][SIZE=2]today! [/SIZE][/FONT][/B][/CENTER]

[CENTER][B][FONT=Arial Black]Please be sure you understand the Ram ForumZ[/FONT] [SIZE=2][COLOR=#800080][URL="https://www.ramforumz.com/misc.php?do=showrules"]RULES[/URL][/COLOR][/SIZE][/B][/CENTER]

Reply With Quote
Old 01-17-2013, 04:13 PM
RugbyRef's Avatar
RugbyRef RugbyRef is offline
Dodge Ram Forum Member
Join Date: Jan 2011
Location: Missouri
Posts: 72
Gender: Male
Vehicle: 2012 Dodge Ram 2500 (CTD)
Trim Level: Laramie
Color: White
Engine: 2011-20?? 409ci (6.7L) Cummins Turbo Diesel 350hp 800lb/ft
Rep Power: 0
RugbyRef is on a distinguished road

P0107 - Manifold Absolute Pressure/Barometric Pressure Circuit Low Input

The Manifold Absolute Pressure (MAP) sensor responds to changes in the intake manifold pressure (vacuum). 5 Volts is supplied to the sensor from the PCM (powertrain control module). Inside the MAP sensor is a resistor that moves in relation to manifold pressure. The resistor varies the voltage between about 1 volt to 4.5 volts (depending on engine load) and that voltage signal is returned to the PCM to indicate manifold pressure (vacuum). This signal is essential for the PCM to determine fuel delivery. A P0107 DTC is set when the PCM sees that the MAP signal voltage is less than .25 volts which is too low.

Potential Symptoms: Anytime the MAP sensor signal is low the vehicle will likely have a very difficult time starting. Other symptoms may include:
* Hard to start
* Long cranking times
* Sputtering/missing
* Blowing black smoke
* Poor fuel economy
* Dies intermittently
* MIL(Malfunction Indicator Lamp) illumination

Causes: The causes of a low MAP sensor signal circuit (P0107) could be any of the following:
* Bad MAP sensor
* Open or short in the signal circuit
* Open or short in the 5 Volt reference circuit
* Ground circuit open or shorted
* Bad PCM

Possible Solutions: First, using a scan tool with the Key on and engine running, monitor the MAP sensor voltage. If it is reading less than .5 volts, turn engine off, unplug the MAP sensor and, using a DVOM (Digital Volt/Ohm Meter) check for 5Volts on the 5 Volt reference circuit.

1. If there is not 5 Volts on the reference circuit, then check for the reference voltage at the PCM connector. If it is present at the PCM connector but not the MAP connector, repair the open in the reference circuit between the PCM and MAP harness connector. If 5 Volt reference is NOT present at the PCM connector, check powers and grounds of PCM and repair/replace as needed. (NOTE: On Chrysler products, a shorted Crank sensor, Vehicle speed sensor or any other sensor that utilizes the 5 Volt reference from the PCM can short out the 5 Volt reference. To fix simply unplug each sensor one at a time until the 5 Volt reference reappears. The last sensor unplugged is the shorted sensor.)
2. If you have a 5 Volt reference at the MAP connector, jumper the 5 volt reference circuit to the signal circuit. Now check the MAP voltage on the scan tool. It should be 4.5 to 5 Volts. If it is, replace MAP sensor. If not, repair open/short in the signal circuit wiring and re-check.
3. If all appears okay, perform a wiggle test. Start engine and manipulate the harness, connector and tap on the MAP sensor. Note any changes in voltage or engine speed. Repair connector, harness, or sensor as needed.
4. If the wiggle test checks out, use a vacuum pump (or just use your lungs) to draw a vacuum on the MAP sensor vacuum port. As you add vacuum the voltage should decrease. With no vacuum, the MAP sensor should read approximately 4.5 volts. If there is no change in MAP sensor reading on the scan tool, replace MAP sensor.

Other similar MAP Sensor DTC's: P0105, P0106, P0108 and P0109.

About the P0073 - Ambient Air Temperature Sensor Circuit High Input

That refers to the circuit of the outside air temperature sensor. The sensor will be mounted in front of the radiator, behind the grille. Likely the problem is that the sensor has failed, or the wiring has a short in it or it's frayed. Inspect the wiring & connectors leading to the sensor. You can also refer to a Dodge repair manual for specific information, but you can also use a DVOM (digital volt ohm meter) to verify the Ohms of the sensor. If in doubt as to your ability to perform the above, please contact a trusted, qualified technician.

Hope this helps to solve it. BTW - not talented with cars at all....just knew where to look!



Last edited by RugbyRef; 01-17-2013 at 04:16 PM. Reason: adding
Reply With Quote
Sponsored Links


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 03:47 AM.

vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright © 2019 VerticalScope Inc. All rights reserved.
Powered by vBulletin® Version 3.8.10
Copyright ©2000 - 2019, vBulletin Solutions, Inc.