P1121 – Infiniti DTC

Infiniti DTC P1121 – TP Sensor Circuit Intermittent Voltage High

DTC P1121 meaning on Infiniti

DTC P1121 on an Infiniti refers to the Throttle Position (TP) Sensor Circuit Intermittent Voltage High. This diagnostic trouble code indicates that there is an intermittent high voltage condition detected in the TP sensor circuit.

Infiniti DTC P1121 symptoms

• Check Engine Light (CEL) illuminated on the dashboard
• Reduced engine performance
• Unstable idle or stalling
• Difficulty accelerating smoothly

Infiniti DTC P1121 causes

• TP sensor malfunction
• Wiring or connector issues in the TP sensor circuit
• Intermittent electrical faults

Infiniti DTC P1121 seriousness

The DTC P1121 should be addressed promptly as it can lead to drivability issues and potentially affect the overall performance of the vehicle. Ignoring this code may result in further damage to engine components.

How to diagnose DTC P1121 on Infiniti

1. Use a diagnostic scanner to retrieve the trouble codes and freeze frame data
2. Inspect the TP sensor and its wiring for any visible damage or corrosion
3. Perform a voltage test on the TP sensor circuit to check for intermittent high voltage readings
4. Check for loose connections or poor grounds in the circuit

How to fix DTC P1121 on Infiniti

1. Replace the TP sensor if it is found to be faulty
2. Repair or replace any damaged wiring or connectors in the TP sensor circuit
3. Clear the trouble codes and perform a test drive to ensure the issue is resolved

How to erase DTC P1121 on Infiniti

1. Use a diagnostic scanner to clear the trouble codes from the vehicle’s computer
2. Disconnect the battery for a few minutes to reset the system
3. After clearing the codes, perform a drive cycle to ensure the DTC P1121 does not return

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