Code Definition

P1281 — Fuel metering solenoid shorted to ground

System: Powertrain  |  Type: Manufacturer-Specific  |  Make: Audi

About P1281

P1281 is a manufacturer-specific powertrain diagnostic trouble code recorded for Audi vehicles. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P1281 is stored, the module has detected a short-circuit (voltage pulled to ground or to supply) in the monitored circuit.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

P1281 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

The fuel metering solenoid on the Audi and Volkswagen diesel injection pump, often called the quantity adjuster, sets the amount of fuel delivered on each pump stroke. The Engine Control Module supplies it with battery voltage and switches the ground side with a variable duty cycle to move the metering element against a return spring, monitoring the state of its own output as it does so. Between switching events the module expects the control line to rise back toward battery voltage through the solenoid winding, so a line that stays low tells it something other than its own driver is pulling t...

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