P1579 – OBD-II DTC

OBD-II DTC P1579 – Throttle Position Sensor Disagreement btwn Sensors

DTC P1579 meaning

DTC P1579 refers to a diagnostic trouble code indicating a disagreement between throttle position sensors. This code is triggered when the Engine Control Module (ECM) detects that the readings from the primary throttle position sensor do not match those from the secondary throttle position sensor. This discrepancy can lead to improper engine performance and may affect the vehicle’s acceleration and overall drivability.

DTC P1579 symptoms

Common symptoms associated with DTC P1579 may include:

• Illuminated check engine light
• Reduced engine power
• Unresponsive throttle
• Erratic engine behavior
• Difficulty in accelerating

DTC P1579 causes

Several factors can lead to the triggering of DTC P1579, including:

• Faulty throttle position sensors
• Wiring issues or poor connections in the throttle position sensor circuit
• Malfunctioning Engine Control Module (ECM)
• Mechanical issues with the throttle body
• Contaminated or damaged throttle position sensor connectors

DTC P1579 seriousness

DTC P1579 is considered a moderate to serious issue. While it may not cause immediate engine failure, it can lead to reduced engine performance and drivability issues. Ignoring this code can result in further damage to the engine or related components, and it may pose safety risks due to reduced acceleration and control.

How to diagnose DTC P1579

To diagnose DTC P1579, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the P1579 code.
2. Inspect the throttle position sensors and their wiring for any visible damage or disconnections.
3. Check the voltage and ground signals at the throttle position sensors using a multimeter.
4. Compare the readings from both throttle position sensors to identify discrepancies.
5. Test the throttle body for mechanical issues that may affect sensor readings.
6. Clear the code and perform a road test to see if the code returns.

How to fix DTC P1579 step-by-step instructions

To fix DTC P1579, follow these steps:

1. Inspect and repair any damaged wiring or connectors related to the throttle position sensors.
2. Replace faulty throttle position sensors if they are found to be malfunctioning.
3. Clean or replace the throttle body if there are mechanical issues affecting its operation.
4. Recheck the voltage and ground signals to ensure they are within specifications.
5. Clear the DTC using an OBD-II scanner.
6. Perform a road test to confirm that the issue has been resolved and the code does not return.

How to erase DTC P1579

To erase DTC P1579, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn on the ignition without starting the engine.
3. Navigate to the “Erase Codes” or “Clear DTCs” option on the scanner.
4. Confirm the action to clear the trouble codes.
5. Disconnect the scanner and start the engine to ensure the code does not reappear.

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