Engine-Codes - Volkswagen - P1136 Volkswagen

P1136 Volkswagen Code - Long Term Fuel Trim Add. Fuel B1 System Too Lean

- Code Popularity: 38,952 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents
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What are the Possible Causes of the DTC P1136 Volkswagen?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Intake air leak
  • Faulty O2 Sensor
  • Faulty Mass Air Flow (MAF) Sensor
  • O2 Sensor harness is open or shorted
  • O2 Sensor circuit poor electrical connection

Code Tech Notes

2002 Volkswagen Passat





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How to Fix the DTC P1136 Volkswagen?

Check the 'Possible Causes' listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

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What is the Cost to Diagnose the Code?

Labor: 1.0

The cost to diagnose the P1136 Volkswagen code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

What Does the P1136 Volkswagen Code Mean?

This fault code is stored in the Engine Control Module (ECM) when the ECM is no longer capable of controlling the air-fuel ratio. For the correct operation of the catalytic converter, the ECM is required to keep the Air-Fuel Ratio (AFR) at approximately lambda 1; this equates to an AFR of 14.7:1 by mass. This is achieved by trimming the fuel mixture to the required amount to cater for slight anomalies during normal operating conditions. However, when a fault causes the fuel trim to exceed a predetermined level the malfunction indicator light is illuminated and a limited operating strategy is employed. The pre-catalyst exhaust gas oxygen sensor is the primary component used for calculating the fuel trim once the system enters closed-loop control. The fuel trim data can be displayed as a percentage, either positive or negative.
This Diagnostic Trouble Code (DTC) can be caused by a faulty mass airflow sensor, fuel pressure regulator, fuel pump, exhaust or intake leaks, secondary air injection leaks, or vacuum leaks. Additionally, any mechanical faults can cause this DTC as well. Common failure points associated with this code are a damaged EVAP purge regulator valve, brake booster, and hoses, electric vacuum pump (if equipped), PVC or ventilation system.

P1136 Volkswagen Code - Long Term Fuel Trim Add. Fuel B1 System Too Lean

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