P2B24 code meaning
Hybrid/EV Electronics Coolant Temperature Sensor C Circuit
Powertrain system Generic code P2Bxx codes Check engine light
What P2B24 means
Some electrified drivetrains measure the power electronics coolant at three points, for example ahead of the inverter, behind it and at the charger or DC/DC converter. P2B24 covers the third of these sensors, C, and reports a circuit fault the controller does not classify further. Which component sensor C watches is not standardised and varies by make. No manufacturer documents P2B24 publicly. NTN-SNR lists the code as an electrical fault in the sensor C circuit. CARB treats every input that serves the inverter's thermal management as a monitored component, so an open or shorted line has to be caught. More specific results for the same sensor are P2B26 (low) and P2B27 (high). With one of several readings missing, controllers usually carry on with the remaining sensors but may lower power limits.
P2B24 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.5 to 2 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2B24
- Stored fault code, possibly with a hybrid system message
- Lower charging or drive power in hot conditions
Common causes of P2B24
- Most likelyConnector or wiring fault in the sensor C circuit
- PossibleFailed sensor C element
- Less likelyInput stage of the evaluating module faulty
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Hybrid electronics coolant temp sensor cWiring harnessHybrid control module
What each part of P2B24 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| B | Area: hybrid propulsion. |
| 24 | The exact fault in that area. |
What to do next
- Note P2B24 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2B24
What does P2B24 mean?
P2B24 means "Hybrid/EV Electronics Coolant Temperature Sensor C Circuit". Some electrified drivetrains measure the power electronics coolant at three points, for example ahead of the inverter, behind it and at the charger or DC/DC converter. It is a generic code, so it means the same on every make.
Is it safe to drive with P2B24?
Drive gently and only to a workshop. With P2B24 the car can go into limp mode (reduced power) to protect itself.
Will P2B24 fail an emissions test?
Yes, it can. P2B24 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P2B24 to fix?
Difficulty: medium. A typical repair takes 0.5 to 2 hours of work. This is a job for a workshop.
Will P2B24 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.