Dodge Nitro: Replacing fuel injector - Dodge Nitro Forum
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post #1 of 12 (permalink) Old 03-24-2018, 11:38 AM Thread Starter
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Dodge Nitro: Replacing fuel injector

Hey!
I've just gotten a p0205 code, injector problem on cylinder 5. I've spent some time trying to find instructions how to replace but found none. Anyone here done it?
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post #2 of 12 (permalink) Old 03-24-2018, 03:03 PM
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Quote:
Originally Posted by Hudene View Post
Hey!
I've just gotten a p0205 code, injector problem on cylinder 5. I've spent some time trying to find instructions how to replace but found none. Anyone here done it?
Welcome Hudene


What engine do you have in your Nitro? Is it a 2.8l CRD?

Rick

Nitro Year: 2007 (1 of 91,815 sold in 07)
Nitro Model: R/T 4X4 Stone White
CAT-BACK Exhaust, CAI, Projector Head Lamps
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post #3 of 12 (permalink) Old 03-24-2018, 05:44 PM Thread Starter
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Thx 🙂
It's a 4.0 R/T.
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post #4 of 12 (permalink) Old 03-24-2018, 09:47 PM
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Quote:
Originally Posted by Hudene View Post
Thx 🙂
It's a 4.0 R/T.
Is the engine Gas ( 3.7 or 4.0) or Diesel ?

Rick

Nitro Year: 2007 (1 of 91,815 sold in 07)
Nitro Model: R/T 4X4 Stone White
CAT-BACK Exhaust, CAI, Projector Head Lamps
Fully-Equipped w/all factory options
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post #5 of 12 (permalink) Old 03-25-2018, 05:18 AM Thread Starter
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Gas 🙂


Quote:
Hey!
Thx for reply in my thread concerning code p0205. I dunno what happened tho, since it seems my replies cant be read. I can see them myself when i browse the thread. I have a 4.0 R/T.
Best regards.
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post #6 of 12 (permalink) Old 03-25-2018, 10:40 AM
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Hudene

Can you see what you are posting? Don't know what 🙂 is but I guess you have a gas 3.7 engine?

P0205 code definition

Injector Circuit Malfunction - Cylinder 5
What the P0205 code means

P0205 is a generic diagnostic trouble code which indicates that the injector circuit for cylinder 5 has out of range voltage or resistance. This is detected by the Engine Control Module (ECM) as it tries to control the circuit.

P0205 can be seen with misfire, and lean/rich condition codes.

P0205 is similar to P0200 - P0202, P0204, and P0206-P0212.

What causes the P0205 code?


Shorted or open wiring harness
Fuel injector cylinder 5 is faulty
ECM has failed
Faulty electrical connection

What are the symptoms of the P0205 code?

Check Engine Light is triggered by the ECM and observed on the dashboard
Failsafe mode (precaution to prevent damage to the vehicle) is enacted by the ECM
Failsafe mode remains in effect until normal operation is detected or the fault is fixed
Gas mileage is poor
Fuel system has lean or rich condition
Engine has a lack of power
Engine runs roughly, poorly, or dies while running
Vehicle is hard to start or does not restart once it has died

How does a mechanic diagnose the P0205 code?

Hooks up a scan tool into the OBD-II port to find any codes that may be stored in the ECM

Observes freeze frame data associated with each code (codes will either be Pending or Active)

Clears codes and performs a test drive using information obtained from the freeze frame data to duplicate the conditions that were present when the code was set

If the P0205 code returns, performs a visual inspection of the injector circuit

Uses scan tool to monitor voltage and resistance found at cylinder 5 fuel injector; checks for proper voltage at the fuel injector itself

Uses a noid light to monitor the on/off pulse of the fuel injector

Performs a test of the ECM

Common mistakes when diagnosing the P0205 code

Mistakes can easily be made by anyone if they skip steps or do not complete all steps required. These steps should always be followed to avoid unnecessary repairs, and save time and money.
How serious is the P0205 code?

P0205 can have some symptoms that are cause for concern such as the engine dying while driving. A vehicle with these issues should not be driven and should be diagnosed as soon as possible for safe driving.

2009 Dodge Nitro 3.7 firing order

Engine is misfiring, check engine code said cylinder 5, prob ignition coil and would like to change the coil but I cannot locate the cylinder numbers do you have a diagram so I can locate the correct coil?


Rick

Nitro Year: 2007 (1 of 91,815 sold in 07)
Nitro Model: R/T 4X4 Stone White
CAT-BACK Exhaust, CAI, Projector Head Lamps
Fully-Equipped w/all factory options
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post #7 of 12 (permalink) Old 03-25-2018, 11:41 AM
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Disconnect electrical connector at fuel injector. Push red colored slider away from injector (1). While pushing slider, depress tab (2) and remove connector (3) from injector.

OPERATION
FUEL INJECTORS


The top (fuel entry) end of the injector is attached into an opening on the fuel rail. See Fig. 94.
The fuel injectors are electrical solenoids. The injector contains a pintle that closes off an orifice at the nozzle end. When electric current is supplied to the injector, the armature and needle move a short distance against a spring, allowing fuel to flow out the orifice. Because the fuel is under high pressure, a fine spray is developed in the shape of a pencil stream. The spraying action atomizes the fuel, adding it to the air entering the combustion chamber.
The nozzle (outlet) ends of the injectors are positioned into openings in the intake manifold just above the intake valve ports of the cylinder head. The engine wiring harness connector for each fuel injector is equipped with an attached numerical tag (INJ 1, INJ 2 etc.). This is used to identify each fuel injector.

The injectors are energized individually in a sequential order by the Powertrain Control Module (PCM). The PCM will adjust injector pulse width by switching the ground path to each individual injector on and off. Injector pulse width is the period of time that the injector is energized. The PCM will adjust injector pulse width based on various inputs it receives.
Battery voltage is supplied to the injectors through the ASD relay.
The PCM determines injector pulse width based on various inputs.

FUEL INJECTORS - PCM OUTPUT

The nozzle ends of the injectors are positioned into openings in the intake manifold just above the intake valve ports of the cylinder head. The engine wiring harness connector for each fuel injector is equipped with an attached numerical tag (INJ 1, INJ 2 etc.). This is used to identify each fuel injector with its respective cylinder number.

The injectors are energized individually in a sequential order by the Powertrain Control Module (PCM). The PCM will adjust injector pulse width by switching the ground path to each individual injector on and off. Injector pulse width is the period of time that the injector is energized. The PCM will adjust injector pulse width based on various inputs it receives.
Battery voltage (12 volts +) is supplied to the injectors through the ASD relay. The ASD relay will shut-down the 12 volt power source to the fuel injectors if the PCM senses the ignition is on, but the engine is not running. This occurs after the engine has not been running for approximately 1.8 seconds.
The PCM determines injector on-time (pulse width) based on various inputs.

REMOVAL
FUEL INJECTORS


Disconnect clip(s) that retain fuel injector(s) to fuel rail

Install fuel injector(s) (3) into fuel rail assembly (4) and install retaining clip(s) (2). 2. If same injector(s) is being reinstalled, install new O-ring(s). Two different O-rings are being used. These can be easily identified by color. Install black O-ring at intake manifold end of injector. Install red/rust colored O-ring at fuel rail end of injector. 3. Apply a small amount of clean engine oil to each injector O-ring. This will aid in installation. 4Install fuel rail. See INSTALLATION. 5. Start engine and check for fuel leaks

Rick

Nitro Year: 2007 (1 of 91,815 sold in 07)
Nitro Model: R/T 4X4 Stone White
CAT-BACK Exhaust, CAI, Projector Head Lamps
Fully-Equipped w/all factory options
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post #8 of 12 (permalink) Old 03-25-2018, 11:44 AM
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Jun 11, 2017

This video shows you how to change your own fuel injectors and save tons of money. This is done on a 2006 Jeep Liberty, but for the most part it is generally the same procedure on other vehicles. Just be sure to always check for fuel leaks before you put everything back together by pressurizing the fuel rail if this is possible on your car.

Rick

Nitro Year: 2007 (1 of 91,815 sold in 07)
Nitro Model: R/T 4X4 Stone White
CAT-BACK Exhaust, CAI, Projector Head Lamps
Fully-Equipped w/all factory options
rickaren is online now  
post #9 of 12 (permalink) Old 03-25-2018, 03:50 PM
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Mopar 4591986AA New Multi Port Injector



This fits your:
2007 Dodge Nitro
R/T
4.0L V6 Gas


The 4.0L Liter (244 Cubic Inches) 60° V-6 engine is a single overhead camshaft design with hydraulic lifters and four valves per cylinder. The engine
does not have provisions for a free wheeling valve train.



Rick

Nitro Year: 2007 (1 of 91,815 sold in 07)
Nitro Model: R/T 4X4 Stone White
CAT-BACK Exhaust, CAI, Projector Head Lamps
Fully-Equipped w/all factory options
rickaren is online now  
post #10 of 12 (permalink) Old 04-02-2018, 01:33 PM
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Complete Fuel System (Injector) Section from 2007 Dodge Nitro Service Manual LINK Below! Enjoy & Good Luck on your repairs.

https://www.keepandshare.com/doc16/2...f-1-7-meg?da=y

Rick

Nitro Year: 2007 (1 of 91,815 sold in 07)
Nitro Model: R/T 4X4 Stone White
CAT-BACK Exhaust, CAI, Projector Head Lamps
Fully-Equipped w/all factory options
rickaren is online now  
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