Engine-Codes - Ford - P1121 1997 Ford F150

P1121 1997 Ford F150 Code - Throttle Position Sensor Inconsistent with Mass Air Flow Sensor

- Code Popularity: 4,226 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 2/3
Table of contents
ChatAC AutoCodes.com AI Chat

What are the Possible Causes of the DTC P1121 1997 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.
  • Air leak between Mass Air Flow sensor and throttle body
  • Faulty Throttle Position Sensor
  • Throttle Position Sensor harness is open or shorted
  • Throttle Position Sensor circuit poor electrical connection
  • Damaged Mass Air Flow sensor
⚠ Does your Ford have Safety Recalls? → Check here

How to Fix the DTC P1121 1997 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.

Search for P1121 1997 Ford F150 Questions and Answers: Search here →

What is the Cost to Diagnose the Code?

Labor: 1.0

The cost to diagnose the P1121 1997 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.

When is the Code Detected?

Sensor signal output not consistent with engine load measurement

What are Code Possible Symptoms?

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

What Does the P1121 1997 Ford F150 Code Mean?

The Powertrain Control Module (PCM) monitors a vehicle operation rationality check by comparing sensed throttle position to mass air flow readings. If during key ON engine running self-test the comparison of the TP sensor and MAF sensor readings are not consistent with calibrated load values, the test fails and a diagnostic trouble code is stored in continuous memory.

P1121 1997 Ford F150 Code - Throttle Position Sensor Inconsistent with Mass Air Flow Sensor

Need more Information on the Code?

Need more information on how to fix the P1121 1997 Ford F150 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1121 1997 Ford F150 code diagnosed by a professional: Find a repair shop in your area