What causes P1684?

What causes P1684?

P1684 means that power to your powertrain control module (PCM) was interrupted. The most common cause of this is because of a weak battery. Anytime you start a car with a battery that has low cranking amps, a voltage can drop quickly, which triggers this code.

How do you reset the check engine light on a 2003 Dodge Caravan?

How Do I Reset the Check Engine Light on a Dodge Grand Caravan?

1. Turn off your ignition.
2. Put on a pair of safety gloves and glasses.
3. Find your battery’s negative terminal.
4. Loosen the nut on the negative terminal with a wrench.
5. Pull the negative connector from the battery and set it aside for 30-60 seconds.

How do I fix code P1684?

Common repairs include:

1. Properly connecting the battery.
2. Replacement of the TCM.
3. Repair or replacement of the TCM harness.
4. Repair or replacement of faulty connection in the TCM circuit.
5. Cleaning the battery terminals.

What is engine code P1684?

The fault code P1684 means that power to your powertrain control module (PCM) was interrupted. The most common cause of this is because of a weak battery. It can also be caused by a wiring issue to the PCM, or a bad connection in the battery cable.

What is code P1684 mean?

What does battery power to module disconnected mean?

Error Code P1684 is detected when the TCM (Transmission Control Module) is disconnected from the battery power B+ or ground. The code simply means the battery is disconnected within the last 50 cycles, but when the motor is started, the voltage on the battery considerably drops.

How do I fix code p1684?

Does disconnecting battery clear codes?

Leaving the battery disconnected for about 15 minutes will ensure the vehicle systems will completely reset when you reconnect the battery. Disconnecting the battery will clear the error codes and reset the check engine light.