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

- Code Popularity: 30,602 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC P1136 Audi?

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
⚠ Does your Audi have Safety Recalls? → Check here

How to Fix the DTC P1136 Audi?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

Code Tech Notes

2002 Volkswagen Passat





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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1136 Audi code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

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

Code P1136 Audi Description

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.

OBDII Code P1136 Audi - Long Term Fuel Trim Add. Fuel B1 System Too Lean - AutoCodes.com
P1136 Audi Code - Long Term Fuel Trim Add. Fuel B1 System Too Lean

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Code P1136 Audi comments

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