P1B18
Hybrid/Electric Vehicle Battery 27 Circuit High Voltage
P1B18 is an OBD-II diagnostic trouble code meaning: Hybrid/Electric Vehicle Battery 27 Circuit High Voltage. Common causes: high voltage battery fault, problems with the charging system. Estimated repair cost: $167–2222.
Symptoms
- Warning message on dashboard
- Reduced power or transition to emergency mode
- Regenerative braking system failure
- Problems with charging a high-voltage battery
- The car may not switch to electric mode
Causes
- High voltage battery fault
- Problems with the charging system
- Battery control unit malfunction
- Damage to high voltage cables or connectors
- Software error in the control system
How to Fix
- Diagnostics of a high-voltage system using special equipment
- Checking the condition of the high-voltage battery
- Inspect high-voltage cables and connectors for damage
- Checking the charging system and related components
- Control system software update
- Repair only from an authorized dealer
Related codes
FAQ
What does the P1B18 code mean?
P1B18 is an OBD-II diagnostic trouble code that indicates: Hybrid/Electric Vehicle Battery 27 Circuit High Voltage
What causes a P1B18 error code?
The most common causes of P1B18 include: High voltage battery fault; Problems with the charging system; Battery control unit malfunction; Damage to high voltage cables or connectors.
How do I fix a P1B18 diagnostic trouble code?
To fix P1B18: Diagnostics of a high-voltage system using special equipment. Checking the condition of the high-voltage battery. Inspect high-voltage cables and connectors for damage. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1B18?
Do not drive — repair immediately
How much does it cost to fix P1B18?
The estimated repair cost for P1B18 is $167–2222. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat