-Possible causes are Faulty Idle Control System motor
- Idle Control System motor harness is open or shorted
- Idle Control System motor circuit poor electrical connection
- Faulty Powertrain or Engine Control Module
- Vaccum leaks or damaged hoses or improper routing check for vaccum leaks first if this was helpful please leave good feed back
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P0505 Chrysler Idle Control System Malfunction
The throttle body has an air control...
SOURCE: obdll code reads "P0351",ignition coil A
Regarding Ignition Coil Driver Fault P0351:
An ignition coil driver is the signal that comes OUT of your PCM at pin A7. The "A" plug is the Black plug nearest your engine that goes into the PCM. So, Pin A7 tells your coil what to do. So it can't be the coil... its the command "to" the coil originating inside the PCM.
What goes "in" at pin A8 is the input signal from your crankshaft sensor. And just above it is pin A18 the camshaft sensor input. These inputs are critical so its no surprise that everyone is running around replacing them even though they don't solve the problem.
The main symptom is that the vehicle misses and backfires, some times stalls, and gives you the DTC P0351. Another problem is very low idle; at a stop sign for instance. Trying to make it home by gunning the throttle while riding the brake. The signal that comes out of pin A10, A11, A19, A20? The Idle Air Control signal to the Idle Air Control Valve on the throttle body.
All of these pins reside together in an area about 1/4" square. The circuit board behind these pins is faulty, or the pins are not making good contact.
Find the PCM, follow the wiring harness from the above mentioned sensors to the PCM and push them in to make sure they are not loose.
Good Luck!! Keep me posted!!
SOURCE: I HAVE DTC PO351 IGNITION
a had a similar problem I changed wires, coil, even connector that plugs into the coil it still had the same problem. It turned out to be the computor. Might be the same thing for you
SOURCE: Actually I have 3 codes
1. Check up the intake system for air leaks. Just spray carburretor cleaner product around intake manifold area, engine idling. If the engine rpm will raise up, there are air leaks. Replace intake manifold gasket, and test again the engine for air leaks. Check up also the exhaust pipes for air leaks. Inspect the exhaust pipes for gases leaks. Repair & replace bad components if necessary. If everything is all right regarding air leaks, and the fault code 171 still occurs, replace the bank 1 upstream oxygen sensor.
2. If the CKP sensor has been changed with new one, just replace the Camshaft Position (CMP) sensor, and test again the engine. If the fault code 320 still occurs, check the harness wire by wire & connection plugs pins, and repair damages. This code must be erased definitely.
3. Replace ignition coil and test again the engine. The fault code 351 must be erased definitely.
Good Luck!
I would check Cam Position Sensor as is directly related with ignition. Power loss is due to the ECU going on "limp mode" to prevent further damage.
I hope this helps!
The
following are the general instructions on the start of diagnosing any
electronically controlled engine or transmission problem.
The engine and the automatic transmission (transmission control is only for automatics, engine is still computer controlled no matter the transmission type) in this vehicle are computer controlled and in most cases when a fault occurs a fault code is stored in the memory of the computer control module. There are exception to this, such as the Mass Airflow Meter and fuel pressure problems. What must be done is to have all the basic testing done such as a scan of the system for fault codes as well as a check with a live data scanner tool for engine functions that are not within range of normal, a trained technician is required to know what is correct and what isn't, then based on careful diagnostics done from a factory repair manual the correct part is replaced or the wiring repaired or the computer replaced (known as the PCM or ECM,ECU), which is very rarely the problem. Other basic checks must be done as well such as mechanical problems with the engine as well as engine state of tune and mileage on the engine. The transmission can have mechanical issues as well such as no gear engagement at all or a failed pump or other pressure related problems. Also engine mechanical problems can and do cause many drive-ability related problem such as rough idle and other symptoms.
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