Code Definition

P1174 — Fuel measurement system bank 1 injection timing incorrect

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

About P1174

P1174 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 P1174 is stored, the module has detected a bank-specific fault, meaning it applies only to one cylinder bank of a multi-bank engine.

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.

P1174 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 Engine Control Module (ECM) does not simply fuel every cylinder identically. It monitors crankshaft acceleration through each cylinder's power stroke and calculates how much each cylinder is actually contributing, then adjusts the injection time and timing for individual cylinders to even out the contributions. DTC P1174 is stored when the ECM finds that the injection times or injection timing it is having to command on bank 1 fall outside the permitted window, meaning one or more cylinders on that bank need substantially more or less fuel than their neighbours to produce the same output. ...

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