Engine-Codes - Ford - P015A Ford

P015A Ford Code - Oxygen Sensor Delayed Response Rich to Lean Bank 1 Sensor 1

- Code Popularity: 1,464 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents
ChatAC AutoCodes.com AI Chat

What are the Possible Causes of the DTC P015A Ford?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Heated Oxygen Bank 1 Sensor 1
  • Heated Oxygen Bank 1 Sensor 1 harness is open or shorted
  • Heated Oxygen Bank 1 Sensor 1 circuit poor electrical connection
  • Inappropriate fuel pressure
  • Faulty fuel injectors
  • Intake air leaks may be faulty
  • Exhaust gas leaks
⚠ Does your Ford have Safety Recalls? → Check here

How to Fix the DTC P015A Ford?

Check 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 pins.

Search for P015A Ford Questions and Answers: Search here →

What is the Cost to Diagnose the Code?

Labor: 1.0

The cost to diagnose the P015A Ford code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.

When is the Code Detected?

The response of the voltage signal from the sensor takes more than the specified time.

What are Code Possible Symptoms?

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

What Does the P015A Ford Code Mean?

During a Deceleration Fuel Shut-Off (DFSO) event, the Powertrain Control Module (PCM) monitors the rear heated oxygen sensor (HO2S) signal to determine if the signal is stuck in range. The PCM expects the signal to exceed a calibrated rich or lean value within a calibrated amount of time. If the signal voltage remains less than the rich value after a number of occurrences, the PCM intrusively controls the fuel system rich over increasing time periods in an attempt to force the signal to greater than the calibrated rich value. The test fails when, after three consecutive intrusive attempts, the signal cannot be forced greater than the calibrated rich value. Also, if the signal voltage remains greater than the lean value after a calibrated amount of time with the fuel injectors off, a counter is incremented. The test fails when after three consecutive occurrences the signal is not less than the calibrated lean value.

P015A Ford Code - Oxygen Sensor Delayed Response Rich to Lean Bank 1 Sensor 1

Need more Information on the Code?

Need more information on how to fix the P015A Ford code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P015A Ford code diagnosed by a professional: Find a repair shop in your area