Engine-Codes - Ford - P1138 2003 FORD F150

P1138 2003 FORD F150 - Lack Of HO2S Switches Bank 1 Sensor 2 Rich

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

P1138 2003 FORD F150 Possible Causes

  • Exhaust leaks
  • Faulty HO2S Bank 1 Sensor 2
  • HO2S Bank 1 Sensor 2 harness is open or shorted
  • HO2S Bank 1 Sensor 2 circuit poor electrical connection

How is the P1138 2003 FORD F150 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

The downstream HO2S sensors are forced rich and lean and monitored by the PCM. The test fails if the PCM does not detect the output of the HO2S in a calibrated amount of time.

What is the cost to diagnose the P1138 2003 FORD F150 code

Labor: 1.0

The cost to diagnose the P1138 2003 FORD F150 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 test fails if the Powertrain Control Module (PCM) does not detect the output of the HO2S in a calibrated amount of time.

Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P1138 2003 FORD F150 Meaning

Sensor Indicates Lean The downstream HO2S sensors are forced rich and lean and monitored by the Powertrain Control Module (PCM)

More Information

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