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Engine-Codes - Ford - P0155 2008 FORD FUSION

P0155 2008 FORD FUSION - O2 Heater Circuit Bank 2 Sensor 1

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

P0155 2008 FORD FUSION Possible Causes

What does this mean?
  • Faulty Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1
  • Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1 circuit fuse
  • Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1 harness is open shorted to ground
  • Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1 circuit poor electrical connection
  • Faulty Engine Control Module (ECM)

How is the P0155 2008 FORD FUSION 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

What does this mean?
The code means that there is a problem with the heater element circuit of the heated oxygen sensor. The Engine Control Module (ECM) monitors how long it take the sensor to warm up and start sending an adequate signal. The code means the the sensor is taking too long to warm up. Replacing the Front Heated Oxygen Sensor (H2OS) Bank 2 usually takes care of the problem.

What is the cost to diagnose the P0155 2008 FORD FUSION code

Labor: 1.0

The cost to diagnose the P0155 2008 FORD FUSION code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.
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When is the code detected?

The current amperage in the front heated oxygen sensor heater circuit is out of the normal range. (An improper voltage drop signal is sent to ECM through the front heated oxygen sensor heater)

Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)
  • Possible higher fuel consumption
  • Possible more smoke from exhaust than usual

P0155 2008 FORD FUSION Meaning

During testing the heated oxygen sensor (HO2S) heaters are checked for open and short circuits and excessive current draw. The test fails when the current draw exceeds a calibrated limit or an open or short circuit is detected.

More Information

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