P214E

Code

Generic P — Powertrain

Reductant Pump A Current Too High

Brand: Generic

Type: P — Powertrain

Views: UK: 22 EN: 42 RU: 18

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Page language: EN

Short to battery voltage in pump power circuit
Pump motor internal short or winding failure
Mechanical seizure or heavy load in pump (blockage, crystallized DEF, clogged filter/nozzle)
Corroded or damaged connector/pins causing high contact resistance or intermittent short
Stuck/failed relay or fused feed supplying constant power
Incorrect pump installed with wrong electrical specs

Malfunction Indicator Lamp (MIL) / DTC P214E stored
Reduced or no reductant dosing, SCR system warnings or restrict-power limp modes
Aftertreatment regen faults or failed emissions test
Audible change in pump sound (grinding, loud whine) or no sound when commanded
Possible pump or harness heat at connector area

Read and record all stored codes and freeze-frame data; check for other aftertreatment codes
Visual inspection of pump, harness, connectors, relay and fuse for damage or corrosion
Inspect DEF reservoir, filters, lines and dosing nozzle for crystallization or blockage
Backprobe pump connector and monitor commanded duty, voltage and ground integrity with a multimeter/oscilloscope
Measure pump current draw with an inline ammeter while commanded on
Verify supply voltage at pump during operation (battery/charging system voltage under load)

Supply voltage at pump during operation: typically ~11–14.5 V (vehicle battery/charging voltage)
Normal running current: varies by vehicle/pump design; commonly under ~4 A for many small dosing pumps (consult OEM spec)
Fault threshold: controller flags 'current too high' when measured current exceeds manufacturer threshold (often 5 A or greater for small pumps) — consult service data
PWM/duty cycle: controller may modulate pump with PWM; verify duty matches commanded value
Static coil resistance: pump motor coil resistance is pump-specific — compare to specification (open/shorts indicate failure)

Connect scanner, read and record codes/freeze frame and note pump command status when code set.
Visually inspect pump, harness, connector and grounds for damage, corrosion, melted insulation or fluid contamination.
Check DEF reservoir, lines, filters and dosing nozzle for clogging or crystallized DEF; clean or replace as needed.
With connector attached, backprobe pump power and ground while commanding pump ON; verify supply voltage and ground continuity.
Install inline DC ammeter in series with pump positive feed and command pump ON; compare measured current to OEM spec. If current is high proceed.
If high current present, disconnect pump and measure pump coil resistance. If coil shows short/low resistance or bench draw is high when connected to battery, replace pump.
If pump draws normal current on bench but high when installed, inspect hydraulic side for restriction (flow blockage, check valve stuck) and system pressure/load.
Inspect and test pump relay/fuse and wiring for short to battery (use wiggle test, resistance/short-to-B+ tests). Repair wiring or replace relay/fuse if faulty.
If wiring and pump test good, test or replace PCM output driver only if OEM service information supports PCM replacement—check for software updates or TSBs first.
After repairs, clear codes, run actuation tests and perform a road or system test to verify proper dosing and confirm no recurrence.