where is the bank 1/sensor 2 O2 sensor on a Dodge Caravan...to the rear of the catalitic converter or to the engine (front) side of the converter?
Crankshaft position sensor circuit malfunction.
Trouble code P1320 means: Distributor Signal Interrupt
The P1135 is set when the Engine Control Module detects a heated oxygen sensor heater circuit malfunction. This could be caused by a faulty air-fuel ratio sensor or a faulty engine control module.
Assuming you mean P0135, that would be O2 sensor heater circuit malfunction (bank 1 sensor 1). If the wiring to bank 1 sensor 1 is not damaged, it is probably a bad bank 1 sensor 1 O2 sensor. Replace it.
You did not specify what engine, however that is a common problem in alot of those cars, you need to remove upper and lower intake manifolds to get to sensor. Refer to repair manual if you do not have auto repair experience (and understand directions), it may be found at library or bought at parts store.
Trouble code P0202 means: Injector circuit malfunction - cylinder #2
Ignition/Distributor Engine Speed Input Circuit Malfunction
P0520 Code Engine Oil Pressure Sensor/Switch Circuit Malfunction
Trouble code P0320 means:Ignition/distibutor engine speed input circuit malfunction
Crankshaft position sensor circuit malfunction.
Engine speed sensor circuit malfunction.
P1621 - Engine control module engine immobilization input circuit malfunction
P0320 Ignition/Distributor Engine Speed Input Circuit Malfunction (cam sensor)
Trouble code P0320 means:Ignition/distibutor engine speed input circuit malfunction
Engine oil pressure sensor circuit malfunction.
Replace the coil.
Trouble code P0320 means:Ignition/distibutor engine speed input circuit malfunction