Open or high-resistance wiring in the reductant pump power or ground circuit; Failed reductant pump motor or internal pump driver; Corroded or loose electrical connector at the pump or control module; Blown fuse or relay supplying power to the reductant pump; Faulty reductant pump control module (if equipped separately); Restricted or kinked reductant line causing the pump to draw low current due to cavitation or dry running; Low diesel exhaust fluid level or frozen fluid in cold conditions causing the pump to run dry and draw low current

DTC codes / P2Cxx · Hybrid propulsion / P2C11

P2C11Reductant Pump A Current Too Low

Q: What does code P2C11 mean?

Reductant Pump A Current Too Low. P2C11 means the engine control module has detected that the current flowing through the reductant pump circuit is lower than expected for the commanded duty cycle, indicating an open circuit, high resistance, or a failing pump. The pump is part of the selective catalytic reduction system that injects diesel exhaust fluid into the exhaust to reduce nitrogen oxides.

P2C11 means the engine control module has detected that the current flowing through the reductant pump circuit is lower than expected for the commanded duty cycle, indicating an open circuit, high resistance, or a failing pump. The pump is part of the selective catalytic reduction system that injects diesel exhaust fluid into the exhaust to reduce nitrogen oxides.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaHybrid propulsion

Symptoms you may notice

Illumination of the check engine light, often with no other noticeable symptoms
A message on the dashboard indicating low diesel exhaust fluid or a reductant system fault
Reduced engine power or limp mode after a certain number of drive cycles
Rough running or hesitation if the system enters a protective strategy
In some cases, a no-start condition if the pump is completely inoperative and the vehicle is programmed to prevent operation

Common causes, most likely first

Open or high-resistance wiring in the reductant pump power or ground circuit
Failed reductant pump motor or internal pump driver
Corroded or loose electrical connector at the pump or control module
Blown fuse or relay supplying power to the reductant pump
Faulty reductant pump control module (if equipped separately)
Restricted or kinked reductant line causing the pump to draw low current due to cavitation or dry running
Low diesel exhaust fluid level or frozen fluid in cold conditions causing the pump to run dry and draw low current

How to diagnose and fix it

Verify diesel exhaust fluid level and condition, and top off or thaw if necessary
Check the fuse and relay for the reductant pump circuit and replace if faulty
Inspect the pump connector and wiring for corrosion, damage, or loose pins; repair as needed
Measure resistance and voltage drop across the pump circuit to identify high resistance or open circuits
Command the pump on with a scan tool and observe current draw; compare to specification
If current remains low with good wiring, replace the reductant pump
Clear codes and perform a reductant system test drive to confirm the repair

Reductant pump current diagnostics

A low current code often results from a poor ground connection rather than a failed pump, so always check ground points before condemning the pump.
Frozen diesel exhaust fluid can cause a low current condition in cold weather, and the code may clear after the vehicle warms up without any parts replacement.
Some vehicles set this code when the reductant pump runs dry due to a low fluid level, so always verify fluid level and quality first.
A scan tool that can command the pump and read live current data is essential; guessing leads to unnecessary pump replacement.
After repairs, a specific drive cycle is often required to clear the code and verify the fix, so follow the manufacturer's procedure.

Can I keep driving with P2C11?

You can usually drive with this code, but the vehicle may enter limp mode or limit speed after repeated faults. Avoid long trips and refill the diesel exhaust fluid promptly; if the engine derates, seek service immediately.

Tools that help

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Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.