Code Definition

P1136 — Long Term Fuel Trim Add. Fuel B1 System Too Lean

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

About P1136

P1136 is a manufacturer-specific powertrain diagnostic trouble code recorded for Volkswagen vehicles. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

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.

P1136 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 Volkswagen and Audi engine management, fuel trim adaptation is split into a multiplicative correction that scales with engine load and an additive correction that mainly affects idle and low load operation. DTC P1136 relates to the Bank 1 additive fuel adaptation and is stored when this correction reaches its lean limit because the ECM has had to add a fixed quantity of fuel to overcome a lean condition that is most pronounced at idle. Because the additive value corrects idle region errors, an unmetered air leak downstream of the air flow sensor is the most likely cause. The ECM compares th...

Join TaT to view the complete code information and diagnostic details.

Quick Facts