Engine-Codes - Ford - P0134 2011 FORD FOCUS

P0134 2011 FORD FOCUS - O2 Sensor Circuit No Activity Detected Sensor 1 Bank 1

Repair Importance Level: 2/3
Repair Difficulty Level: 2/3  What is this?
Table of contents

P0134 2011 FORD FOCUS Possible Causes

  • Faulty Front Heated Oxygen Sensor Bank 1
  • Front Heated Oxygen Sensor Bank 1 harness is open or shorted
  • Front Heated Oxygen Sensor Bank 1 circuit poor electrical connection
  • Inappropriate fuel pressure
  • Faulty fuel injectors
  • Intake air leaks may be faulty
  • Exhaust gas leaks

How is the P0134 2011 FORD FOCUS code repair?

Start by checking 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's pins.

Tech Notes

Replacing the Front Heated Oxygen Sensor Bank 1 usually takes care of the problem.

What is the cost to diagnose the P0134 2011 FORD FOCUS code

Labor: 1.0

The cost to diagnose the P0134 2011 FORD FOCUS code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.

When is the code detected?

The voltage from the sensor is constantly approx. 0.3V.

Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)
  • High Fuel Consumption
  • Excessive Smoke from Exhaust

P0134 2011 FORD FOCUS Meaning

The powertrain control module (PCM) monitors the heated oxygen sensor (HO2S) for a lack of movement concern. If the sensor signal value is not changing from the default value, the PCM commands an oscillating air/fuel ratio attempting to detect some movement in the signal value. The test fails when the PCM is unable to detect movement in the sensor signal while the air/fuel ratio is oscillating.

More Information

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