Code Definition

P1356 — Ignition coil cylinder 1 circuit shorted to positive

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

About P1356

P1356 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 P1356 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.

P1356 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

On coil on plug ignition systems the Engine Control Module controls each cylinder's coil individually, feeding the coil with battery voltage and switching an output stage on the low side to charge the primary winding for the dwell period. The module monitors the state of that control line, so it can identify when the line is being held at battery voltage rather than following the commanded switching. DTC P1356 is stored when the ECM detects the ignition coil 1 circuit shorted to positive, meaning the control line for cylinder 1 cannot be pulled down, no dwell can be established and no spark is...

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