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P1121 2003 Ford F150 Code - Throttle Position Sensor Inconsistent with Mass Air Flow Sensor

- Code Popularity: 3,888 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 2/3
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What are the Possible Causes of the DTC P1121 2003 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
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How to Fix the DTC P1121 2003 Ford F150?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1121 2003 Ford F150 code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to 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)

Code P1121 2003 Ford F150 Description

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.

OBDII Code P1121 2003 Ford F150 - Throttle Position Sensor Inconsistent with Mass Air Flow Sensor - AutoCodes.com
P1121 2003 Ford F150 Code - Throttle Position Sensor Inconsistent with Mass Air Flow Sensor

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Code P1121 2003 Ford F150 comments

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