Powertrain, generic (extended)

P2B69 Coolant Pump D Supply Voltage Circuit

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P2B69 reports that coolant pump D does not receive a usable voltage on its power feed, as distinct from the control line covered by P2B66 to P2B68. No manufacturer documents this code publicly. Ford shows the same failure type for pump B as P2B62 (type 1C, supply outside its permitted band) and for pump A as P2B9D, each checked continuously above 11 V battery voltage. A blown fuse, a relay that no longer closes cleanly, high resistance at a ground point or a weak battery can cause it, and a voltage drop test under load is the way to find them. Such output components fall within CARB 13 CCR 1968.2 (e)(15). Without adequate power the pump slows or quits, so the circuit it serves overheats more easily.

Likely causes

Fuse blown or supply relay contacts worn
High resistance at the pump ground or ground point
Weak battery or charging fault

Symptoms

  • Warning lamp with stored code
  • Pump D slow or inactive
  • Code returns mainly at low battery voltage or high electrical load

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€30–600
Time0.5–3 h

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

Parts involved

coolant pump dwiring harnessecm

Related codes

P2B66P2B6AP2B62P26F7P2DFAP2B9D

References: law.cornell.edu, fordservicecontent.com.