P2E48 code meaning
Hybrid/EV Electronics Coolant Pump B Overspeed
Powertrain system Generic code P2Exx codes Check engine light
What P2E48 means
With P2E48 the controller sees electronics coolant pump B turning faster than commanded, without the separate dry-run test (P2E46) having fired. The usual reason is lost load, since a centrifugal pump accelerates when its impeller gets less liquid, whether from a low level, a collapsed suction hose, partial air or an impeller slipping on its shaft. A Continental patent for electric fuel pumps (US20120245819) compares pump current with voltage or speed to spot leakage or dry running without a pressure sensor. Mercedes' bulletin on pump A's P2B2A7A in the 167 series links excessive speed to leakage or a failed seal. Ford's 2024 summary combines overspeed and dry run in one fault type (B1). No manufacturer publicly documents P2E48. A false speed signal is rarer.
P2E48 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.5 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2E48
- MIL, sometimes with a coolant level warning
- Louder pump noise than usual
- Rising electronics temperatures and power limits
Common causes of P2E48
- Most likelyLow level or residual air in the electronics loop
- PossibleCollapsed or kinked hose on the pump inlet side
- Less likelyImpeller slipping on the pump shaft
- Less likelyImplausible speed feedback from the pump electronics
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Hybrid electronics coolant pump bPower electronics coolant loop
What each part of P2E48 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 48 | The exact fault in that area. |
What to do next
- Note P2E48 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 P2E48
What does P2E48 mean?
P2E48 means "Hybrid/EV Electronics Coolant Pump B Overspeed". With P2E48 the controller sees electronics coolant pump B turning faster than commanded, without the separate dry-run test (P2E46) having fired. It is a generic code, so it means the same on every make.
Is it safe to drive with P2E48?
Drive gently and only to a workshop. With P2E48 the car can go into limp mode (reduced power) to protect itself.
Will P2E48 fail an emissions test?
Yes, it can. P2E48 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 P2E48 to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will P2E48 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.