Powertrain, generic (extended)

P2E49 Hybrid/EV Electronics Coolant Pump B Stuck/Stalled

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P2E49 reports that electronics coolant pump B is powered and commanded, but its rotor does not turn or comes to a standstill. Mitsubishi's 2022 Outlander PHEV shows such a test for its electric water pump: with more than 9 V supply the PHEV-ECU sets P10D9 once the reported speed stays under 100 rpm for 0.5 s, against about 500 rpm when healthy. A GM patent (US9599011) checks electric coolant pumps by comparing the measured current with the current expected for the operating point; a blocked rotor shows up as a mismatch. Ford's 2024 summary names the matching failure type actuator stuck (71). No manufacturer publicly documents P2E49. Seized bearings, debris after repairs, frozen coolant and burnt windings are usual causes. Underspeed is P2E47, pump A's stall code P2C68.

Likely causes

Seized bearing or failed pump B motor
Debris or sealant residue jamming the impeller
Frozen coolant due to insufficient antifreeze
Supply or ground lost under load

Symptoms

  • MIL and hybrid or drive system warning
  • Rapid temperature rise in inverter or charger
  • Strong power reduction or charging stops

Repair estimate

DifficultyHardWorkshop job
Parts and labour€150–1,000
Time1–4 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

hybrid electronics coolant pump bpower electronics coolant loop

Related codes

P2E47P2E48P2E42P2C68P2D05

References: mitsubishitechinfo.com, image-ppubs.uspto.gov, fordservicecontent.com, law.cornell.edu.