OBD Guide
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P1134

HO2S Transition Time Ratio Bank 1 Sensor 1

P1134 is an OBD-II diagnostic trouble code meaning: HO2S Transition Time Ratio Bank 1 Sensor 1. Common causes: faulty oxygen sensor, sensor circuit damage. Estimated repair cost: $17–56.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$17–56 (est.)

Symptoms

  • Unstable engine operation
  • Increased fuel consumption
  • Dips during acceleration
  • Check Engine Light Is On
  • Reduced engine power

Causes

  • Faulty oxygen sensor
  • Sensor circuit damage
  • Air leaks in the intake manifold
  • Faulty fuel injectors
  • Problems with the fuel pressure regulator

How to Fix

  1. Check the condition of the oxygen sensor
  2. Check the integrity of the sensor circuit
  3. Eliminate possible air leaks
  4. Check the operation of the fuel injectors
  5. Check fuel pressure regulator

Related codes

P1135P1133P1130

Error P1134 by Vehicle Brand

BMWBuickCadillacChevroletChryslerFordGMGMCLincolnMazdaMercuryOldsmobileSaturnSubaruVolkswagen

FAQ

What does the P1134 code mean?

P1134 is an OBD-II diagnostic trouble code that indicates: HO2S Transition Time Ratio Bank 1 Sensor 1

What causes a P1134 error code?

The most common causes of P1134 include: Faulty oxygen sensor; Sensor circuit damage; Air leaks in the intake manifold; Faulty fuel injectors.

How do I fix a P1134 diagnostic trouble code?

To fix P1134: Check the condition of the oxygen sensor. Check the integrity of the sensor circuit. Eliminate possible air leaks. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1134?

Yes, but get it checked soon

How much does it cost to fix P1134?

The estimated repair cost for P1134 is $17–56. Actual cost depends on your vehicle, location, and labor rates.

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