P1EFA
Battery Charger High-Voltage Converter 1 Input Current Too High
P1EFA is an OBD-II diagnostic trouble code meaning: Battery Charger High-Voltage Converter 1 Input Current Too High. Common causes: high voltage converter malfunction, problems with high voltage battery. Estimated repair cost: $167–556.
Symptoms
- Check Engine light comes on
- Reduced battery charging efficiency
- The car may go into emergency mode
- Possible problems starting the engine
- Extended charging time
Causes
- High voltage converter malfunction
- Problems with high voltage battery
- Short circuit in charging circuit
- Charger control unit malfunction
- Damage to the charging system wiring harness
How to Fix
- Diagnostics of the charging system using a scanner
- Checking the condition of the high-voltage battery
- Testing the operation of the voltage converter
- Checking the integrity of the wiring harness
- Replacing faulty charging system components
Related codes
FAQ
What does the P1EFA code mean?
P1EFA is an OBD-II diagnostic trouble code that indicates: Battery Charger High-Voltage Converter 1 Input Current Too High
What causes a P1EFA error code?
The most common causes of P1EFA include: High voltage converter malfunction; Problems with high voltage battery; Short circuit in charging circuit; Charger control unit malfunction.
How do I fix a P1EFA diagnostic trouble code?
To fix P1EFA: Diagnostics of the charging system using a scanner. Checking the condition of the high-voltage battery. Testing the operation of the voltage converter. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1EFA?
Do not drive — repair immediately
How much does it cost to fix P1EFA?
The estimated repair cost for P1EFA is $167–556. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat