Dodge DTC P1594 – Charging System Voltage Too High
DTC P1594 meaning on Dodge
DTC P1594 on a Dodge indicates that the charging system voltage is too high. This diagnostic trouble code is triggered when the powertrain control module (PCM) detects that the voltage output from the alternator is exceeding the specified limits.
Dodge DTC P1594 symptoms
Symptoms of DTC P1594 on a Dodge may include:
- Dashboard warning light illuminated
- High voltage readings on the vehicle’s voltmeter
- Electrical system malfunctions
Dodge DTC P1594 causes
Common causes of DTC P1594 on a Dodge include:
- Failed voltage regulator
- Faulty alternator
- Short circuit in the charging system
- Issues with the PCM
Dodge DTC P1594 seriousness
DTC P1594 should be addressed promptly as it can lead to overcharging of the vehicle’s electrical system, potentially causing damage to various components such as the battery, sensors, and other electrical devices.
How to diagnose DTC P1594 on Dodge
To diagnose DTC P1594 on a Dodge, a mechanic may perform the following steps:
- Check the voltage output of the alternator
- Inspect the wiring and connections in the charging system
- Test the voltage regulator for proper functioning
- Scan the PCM for any related fault codes
How to fix DTC P1594 on Dodge
To fix DTC P1594 on a Dodge, the following steps may be taken:
- Replace the voltage regulator if faulty
- Test and replace the alternator if necessary
- Repair any short circuits in the charging system
- Clear the DTC and reset the PCM after repairs
How to erase DTC P1594 on Dodge
To erase DTC P1594 on a Dodge, a mechanic can use a diagnostic scan tool to clear the fault code from the PCM’s memory. After the repair has been completed, the code can be erased to reset the system and ensure the issue has been resolved.
Recommended tools for Dodge diagnostics
Explore our expert picks: The Best OBD2 Scanners for 2025
Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter
Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.