P0A27 Possible Causes
- Faulty hybrid battery cutoff switch
- Hybrid battery cutoff switch circuit is open or shorted
- Poor electrical connection in hybrid battery cutoff switch circuit
What Does It Mean?
How to Fix Code P0A27
Check the “possible causes” listed above. Visually inspect the wiring harness and related connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
P0A27 Possible Symptoms
Check engine light illuminated (or service engine soon warning light)
P0A27 Meaning
The Energy Storage Control Module (ESCM) monitors the battery cutoff switch for overvoltage or open circuit. The ESCM sets the OBDII code when the hybrid battery cutoff switch does not meet factory specifications.