Powertrain, generic (extended)

P215D Reductant Pump B Stuck On

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P215D says the second DEF pump, called pump B or pump 2, keeps running or stays powered although the controller has commanded it off. No manufacturer documents this code publicly. Pump B itself is documented: Ford's 6.7L Super Duty trucks of 2023 can store pump B circuit codes P20FA, P20FC and P20FD (SSM 51891), and FCA names the same channel Reductant Pump 2 on 3.0L EcoDiesel models. California's OBD rule asks for functional checks of output components, and a stuck-on state is the logical opposite of P20FB, Performance/Stuck Off. A driver stage that no longer switches off, a control line shorted on the switched side or a welded relay could cause it. Effects can include pressure that cannot be released, lines not purged at shutdown and a drained battery. P201F is the same fault on pump A.

Likely causes

Output stage in the control module no longer switching off
Pump control line shorted so the pump receives power permanently
Welded contacts in the pump supply relay

Symptoms

  • Check engine light on
  • Pump audible after switching off the engine
  • DEF system warning, possibly a flat battery after standing

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€100–1,500
Time0.5–3 h

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

Parts involved

reductant pumpreductant pump relayreductant control module

Related codes

P201FP20FAP20FBP20FCP20FD

References: law.cornell.edu, static.nhtsa.gov, static.nhtsa.gov.