QuestionQUESTION: Hello Roland,
I have a 2004 Chrysler Sebring Convertible base model with the 2.4 X engine. The car is idling rough. New Plugs, New Wires, Fixed on Vacuum Leak and new MAP Sensor ( engine code P0106).
By reading your earlier posts, the symptoms sound like a stuck EGR Valve.
After checking everywhere in the engine compartment, I am asking your help on FINDING the EGR valve for my model.
Thank you for your time.
ANSWER: Hi Matthew,
I am a bit uncertain so take a look at the vacuum hose diagram that is on a label stuck to the underside of the hood. If you see the egr shown on that diagram, then you will have it on the engine. On the '02 manual the 2.4L drawings show it to be seen from the rear of the engine, just below a couple of hoses that go to the firewall and thence to the heater in the cabin. The cam position sensor is also just above and to the left of the egr. On the other hand, the '04 manual 2.4L shows it also to be near the throttle body, under the air intake hose that goes into the throttle body.
Another way to find it is to look for a long tube that runs across the intake manifold and joins that manifold with a clamp with a "hot" warning flange. The other end of that pipe is where you will find the egr.
Another way to find it is to start at the exhaust manifold and look for a small pipe that branches off therefrom and is routed to the throttle body area, and along that pipe is where the egr valve body will also be found inserted into that pipe. It should have the round vacuum actuator on its top, and the flange with the stem in between the body of the valve and the top. Strangely, on the '03 manual there is no mention of the egr at all! So if you don't see it shown on the underhood label then you don't have one. Please let me know what you learn/find.
Roland
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QUESTION: Hello Roland,
Thank you for your detailed instructions.
One Problem solved, I couldn't find the EGR since there isn't one.
It is still idling rough %26 sometimes stalling. Any ideas on where i should look.
Roland, thank you for making your years of expertise available online.
Matthew
ANSWER: Hi Matthew,
There are so many possibilites. Have you erased the prior fault codes by briefly disconnecting the battery and then checking for any fresh fault codes? That is the most direct way to find a possible cause. Otherwise it is throwing parts at the problem which can get very costly and frustrating. Let me know if you find any new codes and we'll go from there. The reason I pointed to the egr in similar situations is that the pcm can often not detect when although it works, it is not closing tightly. I am glad to learn that there isn't one on the 2.4L '04 engine. It appears that the engine emission controls have evolved such as to eliminate the egr system entirely. And, you are welcome!
Roland
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QUESTION: Hello Roland,
I followed your directions and reset the PCM. Checked it after reset and got "DONE".
Drove the car for 30 minutes to warm it up. Still idling rough. I got the P0106 code again.
Already replaced the MAP sensor and checked the wiring. I'm baffled, any suggestions?
Thanks for your help,
Matt
AnswerHi Matthew,
That code has a number of causes, besides the sensor itself being faulty. The sensor signal wire could be shorted to ground or the 5v supply for the sensor function, or the 5v supply may be shorted. The code is set if the sensor signal voltage is either below 2.2V or above .04V.
The sensor signal wire is dark green/red on pin 1, the ground wire is black/light blue on pin 2 and the 5V supply is violet/white on pin 3. Those wires connect to pins 36, 43 and 61, respectively at the PCM.
To measure while the sensor is connected you would need to use some fine pins to penetrate through the insulation to reach the conductor. You might want to start by inspecting the harness from the plug to where it enters a main harness to make sure that the insulation has not been damaged or the wires fatigued.
Turn the ignition to run but don't start the engine and check the sensor voltage. If it not below 2.2v then shake the harness wires to see if it will drop below that voltage; if not then we have an intermittent problem. If it is below 2.2v then, then remove the plug from the sensor and measure the voltage on pin 3 of the plug with the ignition turned 'on'. Is the voltage somewher between 4.5 and 5.2v? Let me know and we can go from there.
Basically we have to sort out the various possible wiring problems by checking continuity of the wires from plug to plug and verifying the wires are not shorted to some other wire inappropriately.
Roland
