p0128 code dodge charger

The P0128 code on a Dodge Charger usually indicates a problem with the engine's coolant temperature. This code is triggered when the Powertrain Control Module (PCM) detects that the engine is not reaching the expected operating temperature within a specified time period. This can be caused by a malfunctioning thermostat, low coolant levels, or a faulty engine coolant temperature sensor.

Here are some steps you can take to diagnose and fix the issue:

1. Check the coolant level: Low coolant levels can cause the engine to run cooler than normal. Make sure the coolant level is topped off.

2. Check the thermostat: A malfunctioning thermostat can cause the engine to run cooler than normal. Check the thermostat to see if it's stuck open or not opening at all. If so, it may need to be replaced.

3. Check the engine coolant temperature sensor: A faulty engine coolant temperature sensor can give inaccurate readings to the PCM, causing it to think the engine is not reaching the expected operating temperature. Check the sensor and replace it if necessary.

4. Check for other issues: If none of the above steps solve the problem, there may be other issues with the engine that are causing it to run cooler than normal. You may need to have the engine inspected by a qualified mechanic to diagnose the issue.

Once the issue has been diagnosed and fixed, you can clear the P0128 code using an OBD-II scanner.