OBD Guide
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P1149

Air/Fuel Ratio Sensor 1 Circuit Range/Performance

P1149 is an OBD-II diagnostic trouble code meaning: Air/Fuel Ratio Sensor 1 Circuit Range/Performance. Common causes: faulty air/fuel ratio sensor, open or short circuit in the sensor circuit. Estimated repair cost: $33–89.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$33–89 (est.)

Symptoms

  • Unstable engine operation
  • Increased fuel consumption
  • Check Engine light comes on
  • Reduced engine power
  • Dips during acceleration

Causes

  • Faulty air/fuel ratio sensor
  • Open or short circuit in the sensor circuit
  • Poor contact in the sensor connector
  • Air leaks in the intake tract
  • Problems with the fuel system (injectors, pressure regulator)

How to Fix

  1. Check the integrity of the sensor circuit
  2. Inspect the sensor connector for corrosion or damage.
  3. Check sensor parameters using a scanner
  4. Replace air/fuel ratio sensor if necessary
  5. Check the tightness of the intake tract

Related codes

P1130P1131P1132P1133

Error P1149 by Vehicle Brand

Volkswagen

FAQ

What does the P1149 code mean?

P1149 is an OBD-II diagnostic trouble code that indicates: Air/Fuel Ratio Sensor 1 Circuit Range/Performance

What causes a P1149 error code?

The most common causes of P1149 include: Faulty air/fuel ratio sensor; Open or short circuit in the sensor circuit; Poor contact in the sensor connector; Air leaks in the intake tract.

How do I fix a P1149 diagnostic trouble code?

To fix P1149: Check the integrity of the sensor circuit. Inspect the sensor connector for corrosion or damage.. Check sensor parameters using a scanner. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1149?

Yes, but get it checked soon

How much does it cost to fix P1149?

The estimated repair cost for P1149 is $33–89. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat