The first code is nothing major to worry about. It's just a general warning that some electronics may flag up as a fault as they had no power supply.
The second code needs looking at as the vehicle's ECU, (it's brain), is getting confused signals from the engine sensors. As a result it's staying in a Safe Mode. A good auto electrician should be able to sort out both problems.
The codes translate too...
P1684 = The battery has been disconnected within the last 50 starts.
P0320 = Crankshaft position (CKP) sensor/engine speed (RPM) sensor - circuit malfunction
SOURCE: I have a 2000 dodge durango, I have a code P0320.
I put in a new crank positioning sensor and it fixed my problem. 42.00 dollars from NAPA. took about 2 hours to change it.
SOURCE: I have a 2000 dodge durango, I have a code P0320.
above me is right it's a faulty crankshaft position sensor. Hard to get this out so it may be cheap enough to have them change it at the shop. Only a $32 part
SOURCE: Camshaft Position Sensor
P0340 Camshaft Position Sensor "A" Circuit Bank 1 or Single Sensor
P0700 Transmission Control System (MIL Request)
The code P1684 is real easy. The computer is stating that the battery has been disconnected within the last 50 starts.
SOURCE: My 2000 F150 Has a code of P0320
check plugs and wires,start engine and jiggle wires to see if anything happens distributor, coils sensor wires for corrosion also check crank sensor
SOURCE: What is p1388 engine code and diagnostic flow
Take a look at aboutautomobile.com and click on the DTC section on the right hand side.. You can type your codes in and it will give you a description of each of them. Help this helps
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