P1246 – OBD-II DTC

OBD-II DTC P1246 – Sensor Power Supply Low Input

DTC P1246 meaning

DTC P1246 refers to a diagnostic trouble code indicating a low input signal from the sensor power supply. This code is typically associated with the engine control module (ECM) detecting that the voltage level from a specific sensor is below the expected threshold. The affected sensor is often related to the vehicle’s fuel system or emissions control system.

DTC P1246 symptoms

Common symptoms associated with DTC P1246 may include:

• Check Engine Light illuminated
• Decreased engine performance
• Increased fuel consumption
• Rough idling or stalling
• Failed emissions test

DTC P1246 causes

Several factors can lead to the triggering of DTC P1246, including:

• Faulty sensor or wiring
• Corroded or loose electrical connections
• Defective engine control module (ECM)
• Low battery voltage or poor charging system
• Issues with the fuel system, such as a clogged fuel filter

DTC P1246 seriousness

DTC P1246 can be considered serious as it may affect the vehicle’s performance and emissions. If left unaddressed, it can lead to further engine damage or increased emissions, potentially resulting in failing an emissions test. It is advisable to diagnose and repair the issue promptly to maintain vehicle reliability and compliance with environmental regulations.

How to diagnose DTC P1246

To diagnose DTC P1246, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the P1246 code.
2. Check for any additional trouble codes that may provide more context.
3. Inspect the wiring and connectors related to the affected sensor for damage or corrosion.
4. Test the voltage supply to the sensor using a multimeter.
5. Verify the operation of the sensor by checking its output signal.
6. Examine the ECM for any signs of malfunction or software issues.

How to fix DTC P1246 step-by-step instructions

To fix DTC P1246, follow these step-by-step instructions:

1. Clear the DTC using an OBD-II scanner.
2. Inspect and repair any damaged wiring or connectors related to the sensor.
3. Replace the faulty sensor if it is determined to be defective.
4. Ensure the battery and charging system are functioning properly.
5. Recheck the voltage supply to the sensor and ensure it meets specifications.
6. Test drive the vehicle to see if the code reappears.

How to erase DTC P1246

To erase DTC P1246, 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 return.

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