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Chrysler Repair/Code P1391 2.5L V-6


HOla Amigo he esta siguiendote y me gusta el apoyo que das a usuarios.
Tengo un Chrysler sebring 1998 LXI motor 2.5 6 cilindros.
El carro desde hace varios meses se apaga. Al estar rodando cierto tiempo se apaga y comienza a fallar, se queda sin fuerzas (como ahogado y hace explosiones) al enfriar vuelve bien. Lo escanearos y aparec el codigo 1391. Como me podrias ayudar. Gracias

Hi Oscar,
I answered a similar question about the code 1391 a few year ago. That code says there is a intermittent problem with either the crankshaft position sensor or the camshaft position sensor. Without going into the detail of their locations, here is what I suggested that be done to find out which sensor is bad. It involves using a voltmeter to measure the pulsation of voltage on pins of the engine controller plug while you rotate the engine by hand using a socket and handle and with the ignition switch turned "on". It should be done when the engine is not working well because it is temporary and has to be caught "in the act":
Probably the way you will catch it in the act so be ready to measure the pulses from the cam and crank sensors when the problem begins. The sensor common ground wire (black/light blue) is on pin 43 of the pcm. You would put a voltmeter between that wire and either pin 33 (tan/yellow, cam sensor located in the distributor) or pin 32 (gray/black, crank sensor) to watch the signal pulses. If you carry a socket and handle to turn the crank by hand at the pulley bolt, and you put the ignition in the 'run' position, then having pins through the insulation to contact the wires, you can attach the voltmeter leads to the pins. As you turn the engine by hand, the reading should pulse between 5 and 0.3V (many times per revolution for the crank, just a few for the cam sensor). So ideally you catch one of those sensors not pulsing as described when the engine is not running well. You could also pre-check the wiring on those three lines, and there is a common 8v wire coming from pin 44 on an orange wire to the sensors (pin 2 of the 6 pin plug at the distributor, at the crank sensor plug) which you might also want to check when you are doing the sensor signal pulse check as it is possible that if that supply voltage were flaky then both sensors would have bad pulses.
Please let me know what you learn.

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Roland Finston


Free fast answer to your repair question about a Chrysler/Dodge/Plymouth car, minivan, SUV, or truck. Problems with electronically controlled engines and transmissions as well as body wiring problems are my specialty. This free troubleshoot advice forum helps you diagnose faults, minimize repair costs or do-it-yourself.

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