Engine-Codes - Ford - P1128 1999 FORD F150

P1128 1999 FORD F150 - Front O2 Sensor Connectors Swapped

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

P1128 1999 FORD F150 Possible Causes

  • Crossed HO2S Harness Connectors
  • Powertrain Control Module (PCM) Harness Connector

How is the P1128 1999 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.

What is the cost to diagnose the P1128 1999 FORD F150 code

Labor: 1.0

The cost to diagnose the P1128 1999 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.
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Possible Symptoms

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

P1128 1999 FORD F150 Meaning

The Diagnostic Trouble Code (DTC) will set anytime the Powertrain Control Module (PCM) Detects Upstream Oxygen Sensors swapped from Bank to Bank. Heated Exhaust Gas Oxygen (HEGO) Sensor Monitor checks & determines if the HO2S signal response for fuel shift corresponds to the correct engine bank. The code sets when HO2S being tested is not indicated.

More Information

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