P0107 Code Dodge Cummins – Causes, Symptoms, & Solution
P0107 Dodge Cummins is a diagnostic trouble code for RAM trucks indicating problems with the manifold absolute pressure (MAP) sensor. This code only sets in once the engine control module detects low voltage in the MAP circuit sensor.
Typically, the primary cause of this trouble code is a bad MAP sensor. Sometimes, the code may appear due to low fuel pressure or a faulty engine control module.
But what else causes the P0107 code to show up, and are there any symptoms to watch out for? Keep reading to find out how I fixed the P0107 code in my Dodge Cummins-
P0107 Dodge Cummins Trouble Code Causes & Solution
P0107 code may pop up for various reasons. Take a look at the table below to have an overall idea of possible causes and solutions.
P0107 Code Causes
|Faulty MAP Sensor||Clean the MAP sensor|
|Reset the sensor|
|Replace the sensor|
|Damaged or Loose Wiring||Repair the damaged sections|
|Tighten any loose connection|
|Low Fuel Pressure||Clean the fuel filter|
|Replace the faulty fuel pump, filter, and regulator|
|Bad ECM||Replace the shorted or corroded wires|
|Install a new ECM|
|Faulty Inlet Air Temp Sensor||Replace the damaged sensor|
Before going to discuss the further details of the table, let’s decode the P0107 first.
What Does the P0107 Code Dodge Cummins Mean?
This is a diagnostic trouble code standard in Dodge Ram trucks. The P0107 code is set when the engine control module (ECM) detects low voltage in the MAP circuit sensor.
You see, the MAP sensor is built to record the air pressure in the intake manifold. It then relays this information to the ECM as a voltage signal. If the voltage is below 0.5 V, the P0107 Dodge Cummins will pop up. This is because the recommended voltage signal varies from 1 volt to 5 volts.
Here is what a MAP sensor, which is located on the intake manifold, looks like:
What Causes P0107 Dodge Cummins Code & How Do You Fix It?
Now you know what the P0107 code means in Dodge Cummins trucks. Let’s find out what causes the low voltage in the MAP sensor with solutions.
1. Defective MAP Sensor
A defective MAP sensor may be due to a clogged or leaking vacuum hose. This hose joins the sensor to the intake manifold. When this happens, the sensor may not read the air pressure changes.
Start by checking the voltage of your MAP sensor. If it is low, clean the sensor using an electric part cleaner or a special MAP sensor cleaner.
And if the issue persists, try resetting the MAP sensor. Simply disconnect the sensor from the battery for about 12 minutes and plug it in. Lastly, replace the sensor if the code fails to clear.
2. Damaged Wiring
The MAP sensor boasts three wires: the sensor ground, signal wire, and 5-volt reference wire. Sometimes, these wires may crack or become loose or brittle. The wiring harness may also short circuit. As a result, the sensor may send incorrect voltage signals to the engine control module, triggering the P0107 code.
First, check for any loose electrical connection on the wiring and tighten it. Next, if it is just a section of the wiring that is damaged, cut out the damaged part. Then, solder and heat shrink in a new wire.
Check out this video on how to solder wires like a professional:
3. Low Fuel Pressure
Another common cause of the P0107 code is low fuel pressure, especially with the 2003 Dodge Quad Cab Non-California HO. This usually causes the engine light to illuminate, and you may also experience limited power.
The common cause of low fuel pressure is a bad fuel pump or a clogged fuel filter. Therefore, the best solution would be to replace the fuel pump and regulator. Then, check the fuel filter for clogging and clean or replace it.
4. Faulty Engine Control Module (ECM)
The ECM is an electrical system just like the MAP sensor. As such, it is prone to short circuits. Also, the wiring harness leading to the ECM may get corroded or damaged by excessive heat, rain, or high humidity.
When the ECM is faulty, it will not correctly interpret the voltage signal. Consequently, this sets the P0107 trouble code. (1)
The best solution is to replace the entire engine control module. But if the issue is with the wiring, you only repair the corroded or shorted wires.
5. Inlet Air Temperature Sensor Low Voltage
Inside the cold air intake of your Ram truck, you will find an intake air temp sensor. This sensor shares the same 5-volt reference line with the MAP sensor. So, when the inlet air temp sensor has a low voltage, the MAP sensor will throw the P0107 code. This issue is typical in the 2007 3500 Quad 5.9L.
You only need to replace the intake air temperature sensor, not the manifold absolute pressure sensor.
What are the Signs Of a P0107 Error Code or Faulty MAP Sensor?
When the P0107 code Dodge Cummins pops up, it may be preceded by several indications. These indications may vary from one Ram truck to another and include:
- Check engine light illuminating
- Erratic acceleration
- Poor idling and hard to start
- Excessive fuel consumption
- Engine backfiring and stalling intermittently
- Limited power, causing long cranking times
- Blowing black smoke
Q: What is the cost of fixing the P0107 error code?
The average cost of replacing the MAP sensor is between $100 and $200, including labor costs. This cost varies based on whether you use aftermarket or OEM replacement parts.
Q: Can I drive without clearing the P0107 code?
Yes, you can, but it is not recommended. This is because your Ram truck may stall due to limited power and become hard to start.
Q: How long does it take to fix the P0107 code?
If you are replacing the MAP sensor, the process may take you less than an hour to complete the replacement. (2)
If your Ram truck’s MAP sensor’s voltage signal is low, you will definitely get the P0107 code Dodge Cummins. The low voltage may be due to a faulty MAP sensor, loose electrical wiring, bad ECM, or reduced fuel pressure.
But whichever the cause of the P0107 code is, there are many ways to clear the code. For instance, you could clean and reset the MAP sensor. Or you could replace the sensor. That said, there are several P0107 code signs to watch out for, like loss of engine power, hard starting, and stalling.
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