P2061: Reductant Injection Air Pump Control Circuit High

P2061 is the high-side counterpart: the pump or valve output that feeds atomizing air carries voltage when the controller expects it to be off, or the diagnostic sees a level that only a connection to battery positive can explain. Deutz documents it on the EMR L1 controller as P2061-00, short circuit to battery on the high side (SPN 5796). The consequence can be the reverse of P2060: the valve may stay energised and keep blowing air through the dosing unit even when no DEF is wanted, which wastes compressed air, while the controller still blocks dosing because it has lost control of the output. Typical are a wire pinched against a powered cable in the same loom or a damaged connector. Open circuits belong to P2059.

Medium severity. Can I keep driving?Deal with it soon. If the instrument cluster shows a countdown, the car may not restart once it reaches zero.

Symptoms

Emission warning lamp on
Air valve may run continuously, air system loses pressure
DEF dosing blocked

Most likely causes

Control wire shorted to a powered cable in the loom
Damaged connector with bridged pins
Output stage in the controller failed

What to check, in order

Start with the simplest. You can tick off each step.

Check the AdBlue/DEF level and quality, and do not add additives or water
Check the sensor's ground and make sure the signal wire is not receiving voltage from another circuit.
Look for white crystals around the injector and the tank
Check connectors and heaters with the scanner
Run the dosing test available on your diagnostic tool
Replace parts only when the test points to that component

Good to know

Repair difficulty: medium
It can trigger limp mode.
It affects emissions.

What each character of P2061 means

P: Powertrain: engine and transmission
2: Generic code: same on every make
0: Subsystem depends on the code range
61: Specific fault in that system

Frequently asked questions

Can I keep driving with code P2061?

Deal with it soon. If the instrument cluster shows a countdown, the car may not restart once it reaches zero.

What causes code P2061?

The most common causes are: control wire shorted to a powered cable in the loom; damaged connector with bridged pins; output stage in the controller failed.

Related codes

Sources

Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.