Engine-Codes - Ford - P1128 1999 Ford F150

P1128 1999 Ford F150 Code - Front O2 Sensor Connectors Swapped

- Code Popularity: 1,673 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 2/3
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What are the Possible Causes of the DTC P1128 1999 Ford F150?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Crossed HO2S Harness Connectors
  • Powertrain Control Module (PCM) Harness Connector
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How to Fix the DTC P1128 1999 Ford F150?

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.

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What is the Cost to Diagnose the Code?

Labor: 1.0

The cost to diagnose the P1128 1999 Ford F150 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.

What are Code Possible Symptoms?

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

What Does the P1128 1999 Ford F150 Code Mean?

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.

P1128 1999 Ford F150 Code - Front O2 Sensor Connectors Swapped

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