The hybrid control module detects that the power electronics cooling system does not maintain target temperatures under load. Coolant flow, radiator fouling, or pump output reduced.
High severity. Can I keep driving?If the car still runs, drive as little as possible and go to a specialized repair shop. Do not touch the orange cables: they carry high voltage.
Most likely causes
- Radiator fins fouled - reduced heat rejection
- Coolant aged - reduced heat capacity
What to check, in order
Start with the simplest. You can tick off each step.
Good to know
- Repair difficulty: hard
- It can trigger limp mode.
What each character of P2C72 means
- P: Powertrain: engine and transmission
- 2: Generic code: same on every make
- C: Subsystem depends on the code range
- 72: Specific fault in that system
Frequently asked questions
Can I keep driving with code P2C72?
If the car still runs, drive as little as possible and go to a specialized repair shop. Do not touch the orange cables: they carry high voltage.
What causes code P2C72?
The most common causes are: radiator fins fouled - reduced heat rejection; coolant aged - reduced heat capacity.
Sources
Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.