P1136Fuel & Air Metering

Long Term Fuel Trim Adaptation Lean, Bank 1 (VW/Audi)

P1136 is a VW/Audi code meaning the long-term fuel trim adaptation on Bank 1 shifted too far lean at part throttle. It points to a lean condition from air leaks, MAF issues, or fuel delivery.

🚗 Yes, short-term, but expect worse fuel economy.

MEDIUM

severity

🎯 Top Causes, Ranked by Likelihood

#1Vacuum or intake leak$50-$400

45%

Unmetered air leans the mixture at part throttle.

#2Dirty or failing MAF sensor$50-$350

30%

An underreading MAF causes a lean condition.

#3Fuel delivery weakness$50-$600

25%

Low fuel pressure or weak injectors lean the mixture.

🩺 Common Symptoms

Check engine light
Rough idle
Reduced fuel economy
Hesitation

💰 Repair Cost: DIY vs Shop

DIY Cost

$50-$400

Shop Cost

$150-$600

📋 Free OBD2 Code Cheat Sheet

The 50 most common codes with likely cause and DIY fix cost. Sent once, no spam.

🔧 How to Diagnose P1136

1Smoke-test for vacuum leaks

2Clean or test the MAF sensor

3Check fuel pressure and injectors

4Recheck fuel trims after repairs

❓ Frequently Asked Questions

Can I drive with P1136?

Short-term yes, but the lean condition hurts economy. Diagnose within a week or two.

Is P1136 a VW/Audi code?

Yes, P1136 is a VW/Audi long-term fuel trim lean adaptation code for Bank 1.

What causes P1136?

A vacuum leak, a dirty or failing MAF, or fuel delivery weakness are the common causes.

🔗 Related Codes

P1128P0171P0101