Code Definition

P1253 — Instrument panel, fuel useage signal short to ground

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

About P1253

P1253 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 P1253 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.

P1253 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 usage signal, often called the fuel consumption signal, is an output from the Engine Control Module to the instrument panel that represents how much fuel the engine is currently injecting. On these Audi and Volkswagen applications the module produces a square wave whose frequency or pulse width is proportional to injected quantity, and the instrument cluster integrates that signal to drive the consumption display, the trip computer and the range calculation. Because the ECM monitors the state of its own output, it can detect when that line is being pulled low by something other than i...

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