P2060 indicates that the Powertrain Control Module (PCM) has detected a low voltage condition in the control circuit for the reductant injection air pump. This pump supplies pressurized air to the SCR system to aid in diesel exhaust fluid (DEF) injection, and a low circuit voltage can prevent proper pump operation.
The pump motor or internal electronics have failed, causing the control circuit to draw insufficient current and register low voltage.
Damaged, chafed, or corroded wires between the PCM and the pump can create a short to ground or an open, resulting in a low‑voltage reading.
The fuse or relay supplying power to the reductant injection air pump circuit may be open, preventing proper voltage from reaching the pump.
Poor contact at the pump connector or a weak ground connection can cause voltage drop that the PCM interprets as a low circuit condition.
Although uncommon, the PCM’s driver circuit for the pump control can fail, producing a low‑voltage signal; this is considered only after pump, wiring, fuse, and relay are verified good.
No. PCM failure is rare for this code; most cases are due to the pump, its wiring, fuse, relay, or connectors. Replacing the PCM without first checking those components is unnecessary and often ineffective.
Yes. If the fuse supplying power to the reductant injection air pump circuit is open, the PCM will see low voltage and set P2060.
Start with the fuse and relay for the pump circuit, then inspect the wiring harness and connectors for damage or corrosion before testing the pump itself.
Typically, a failed pump will cause low voltage in its control circuit, triggering P2060, but intermittent wiring issues can also produce the same symptom.