Question about Dodge Grand Caravan
P0353 Ignition Coil C Primary/Secondary Circuit Malfunction
Chrysler had a problem with the Cam sensor seizing up, before it seizes up completely and as the shaft the drives the sensor dries up and begines to seize it will "hangup" causing the PCM mis-trigger the coils - you might hear a "chipping" sound may or may not feel the misfire - and set a coil primary code (it thinks the problem is in the primary circuit and sets codes for the coil primarys. If this is what is happening on your vehicle you should have codes P0351, P0352, and P0353; if so, replace the cam sensor, and if not then either replace it or test for other issues.
P1398 PCM Is Unable To Learn The Crankshaft Position Sensor's Signal
PCM is unable to learn the Crank Sensors Signal in preparation for Mis Fire diagnostics. Probable defective Crank Sensor.
The code does not mean specifically that the sensor is defective. It is that the system in the pcm that checks for misfires is not able to take into account machining differences between the cylinders(which causes variations in the rpm [that it calculates]so that it can't truly measure misfires by variations in rpm,which is what it needs to do to detect and to reduce emissions).
The possible causes are:
- Position Sensor improperly installed (you will want to get a new spacer paper for the tip of the sensor, then reinstall it with the tip placed against the flex plate... the paper self destructs but establishes the interface spacing that is necessary for proper operation. Maybe a dealer will have such a spacer),
- variation between the sensor target and the flexplate that it looks at (due to damage to slots in plate or foreign material),
- severly worn crankshaft bearings,
- wiring connector to sensor,
- low compression in one or more cylinders,
- faulty sensor,
- faulty pcm.
So you might want to run thru those items in order to see if you can find something before replacing the sensor. If none can be found, then replacing the crank sensor may be the thing to try. You can erase the old code by disconnecting the battery for a few minutes. Do that after you try a correction so as to be sure that you aren't looking at the old code.
Hope help with this.
Posted on May 05, 2010
Yes quite easy but the coil for this model is on the back side of the engine so it is best to come from under the vehicle to the back side of the engine to get the coil off. C coil is the furthest one on the passager side of the engine. take note of what plug wire goes where. if you mix them up you will have a bad missfire. I would also preforma tune up on your engine, change out the sparkplugs and wires.
the P1398 should be reset after you fix the coil and should not come back
Posted on May 05, 2010
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Posted on Jan 02, 2017
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