Code Definition

P1113 — O2S Sensor Heater Resistance Too High Bank 1 Sensor 1

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

About P1113

P1113 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 P1113 is stored, the module has detected a signal or supply voltage higher than the expected operating range; a bank-specific fault, meaning it applies only to one cylinder bank of a multi-bank engine; and a sensor-related fault — the reported value from the named sensor is out of spec.

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.

P1113 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

This fault code indicates the Engine Control Module (ECM) has measured higher than expected resistance in the heater circuit of the upstream oxygen sensor on Bank 1 Sensor 1, the sensor mounted before the catalytic converter. The integrated heater brings the sensor element up to operating temperature quickly so the ECM can enter closed loop and read the exhaust oxygen content accurately. When the measured heater resistance rises above the expected window, often from a deteriorating heater element or added circuit resistance, the ECM flags the heater as unable to maintain temperature. Symptoms ...

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