P1247 (Volkswagen, Audi, Skoda, Seat) Fuel injector needle stroke sensor - open circuit/short circuit to positive
Content
P1247 – OBD-II Trouble Code Technical Description
Trouble code P1247 indicates an open circuit/short to positive in the electrical circuit of the fuel injector needle stroke sensor in Volkswagen, Audi, Skoda, Seat vehicles.
What does the fault code mean P1247?
Trouble code P1247 indicates a problem in the fuel injector needle stroke sensor circuit. The needle stroke sensor monitors the fuel supply to the engine, ensuring optimal mixing of fuel with air for proper combustion in the cylinders. In this case, an open circuit or short to positive means that the electrical circuit connecting the sensor to the engine control unit is experiencing problems. An open circuit means that the electrical connection between the sensor and the engine control module is interrupted, resulting in loss of communication with the sensor. A short circuit to positive means that the electrical circuit is shorted to positive, which can lead to incorrect operation of the sensor and the transmission of incorrect data.
Possible reasons
Several possible reasons for the P1247 trouble code:
- Open circuit: The wiring connecting the fuel injector needle travel sensor to the engine control module may be broken, resulting in loss of communication and no data from the sensor.
- Short circuit to positive: If the electrical circuit is exposed to positive (+) voltage, it may cause the sensor to malfunction and transmit incorrect data.
- Wiring damage: The wires connecting the sensor to the engine control unit may become damaged mechanically or due to external factors such as corrosion or moisture.
- Sensor malfunction: The fuel injector needle stroke sensor itself may be damaged or malfunctioning, causing incorrect data transmission.
- Problems with the engine control unit (ECU): Malfunctions in the engine control unit can cause the signal from the sensor to be misinterpreted and unreliable data transmitted.
- Mechanical damage: Mechanical damage to the circuit, such as damaged wire insulation, can cause the sensor to malfunction.
- Electrical Interference: External electrical noise or unstable power supply may cause incorrect data transmission from the sensor.
To accurately determine the cause of the P1247 error, it is necessary to carry out diagnostics, including checking the wiring, connectors, sensor and engine control unit.
What are the symptoms of a fault code? P1247?
Symptoms for error code P1247 may include the following:
- Unstable engine operation: It is possible that if there is a problem with the fuel injector needle stroke sensor, the engine will run unstably. This may manifest itself as a rattling noise, rough idling, or unpredictable RPM fluctuations.
- Power Loss: Incorrect data from the sensor can result in improper fuel delivery to the engine, which can result in loss of power when accelerating or at speed.
- Unstable idle: The vehicle may experience instability at idle due to improper fuel delivery.
- Increased fuel consumption: Incorrect operation of the fuel injection system due to problems with the sensor can lead to increased fuel consumption.
- Engine prohibition: In some cases, if the error indicates a serious fuel delivery problem, the engine may shut down or enter a safe mode.
- Other error codes appear: In addition to P1247, other error codes related to the fuel injection system or engine electrical components may also appear.
How to diagnose a fault code P1247?
The following steps can be taken to diagnose DTC P1247:
- Reading the error code: Using a diagnostic scan tool, read the P1247 error code and make sure it is actually present in the system.
- Visual inspection: Inspect the wiring and connectors connecting the fuel injector needle travel sensor to the engine control module for damage, breaks, oxidation, or corrosion. Also check the condition of the sensor itself.
- Resistance test: Using a multimeter, check the resistance of the fuel injector needle stroke sensor circuit. The resistance must be within the acceptable values specified in the technical documentation for your specific vehicle.
- Checking the fuel injector needle stroke sensor: Check the sensor itself for correct operation. This may include checking its signal for changes as the needle moves.
- Checking the power and ground circuit: Verify that the sensor's power and ground circuits are functioning correctly. Check the power supply voltage and make sure the ground is well connected.
- Checking the engine control unit (ECU): If all of the above steps do not identify the cause of the error, you may need to check the engine control unit for faults.
- Additional tests: If necessary, additional tests may be required, including checking other fuel injection system components or engine electrical components.
After diagnosing and identifying the cause of error P1247, it is necessary to carry out the necessary repairs or replacement of components to eliminate the problem. If you do not have experience in carrying out such work, it is recommended that you contact a professional auto mechanic for assistance.
Diagnostic errors
When diagnosing DTC P1247, the following errors may occur:
- Incorrect error code reading: A mechanic may misinterpret the P1247 code, which could lead to an incorrect diagnosis and therefore a failed repair.
- Skip visual inspection: Insufficient inspection of wiring and connectors may result in missing visible damage such as breaks or corrosion, which may be the root cause of the error.
- Faulty diagnostic equipment: Using faulty or inappropriate diagnostic equipment may result in incorrect data analysis or reading of error codes.
- Skipping resistance tests: Not performing resistance tests on the fuel injector needle travel sensor circuit may result in missing problems with the wiring or the sensor itself.
- Skipping power and ground circuit tests: Not checking the power and ground circuits may result in missing power or ground problems, which could be the root cause of the error.
- Incorrect component replacement: If a complete diagnosis is not performed, the mechanic may replace undamaged components, which will not solve the problem and will result in unnecessary costs.
- Ignoring additional tests: Ignoring additional tests or not performing a complete diagnosis may result in missing additional problems or malfunctions related to other vehicle components.
To avoid these errors, it is important to carry out the diagnosis systematically, following the process carefully and using the correct equipment.
How serious is the fault code? P1247?
Trouble code P1247 indicates a problem with the fuel injector needle stroke sensor. Here are some of the possible reasons for this error:
- Needle stroke sensor malfunction: The needle stroke sensor itself may be damaged or fail due to wear, corrosion, or other reasons. This may cause the injector needle position to be incorrectly read.
- Problems with wiring and connectors: The wiring connecting the needle stroke sensor to the central engine control unit may be broken, damaged, or have poor connections. Connectors may also be improperly connected or damaged.
- Malfunctions in the central control unit: Problems with the central engine control unit, such as a short circuit or damaged electronic components, can cause the P1247 code.
- Problems with the injector needle: If the injector needle is stuck or not working properly due to wear or other reasons, this can also cause a P1247 code.
- Fuel system problems: Insufficient fuel pressure, clogged fuel filters, or other problems in the fuel injection system can affect the needle stroke sensor.
- Electrical Interference: Noise or interference in the electrical circuit associated with the needle stroke sensor can also cause P1247.
These are just some of the possible causes, and to accurately determine the problem, a detailed diagnosis of the car by specialists is required.
What repair will help eliminate the code? P1247?
Troubleshooting trouble code P1247 may involve several steps depending on the specific cause of the problem. Here are some possible repair options:
- Replacing the needle stroke sensor: If the problem is due to a malfunction of the needle stroke sensor itself, then replacing it may help resolve the P1247 error. The new sensor must be installed according to the manufacturer's instructions.
- Repair or replacement of wiring and connectors: If the problem is caused by damaged or broken wiring or faulty connectors, repairing or replacing them may solve the problem.
- Diagnostics and repair of the central control unit: If a fault is detected in the central engine control unit, such as a short circuit or damaged electronic components, it may require diagnosis and repair. This may include replacing damaged components or updating the control unit software.
- Checking and replacing the injector needle: If the injector needle is stuck or not working properly, this can also cause a P1247 code. Check the condition of the injector needle and, if necessary, replace it.
- Cleaning or replacing fuel filters: Clogged fuel filters can cause the needle stroke sensor to malfunction. In this case, they may need to be cleaned or replaced.
- Additional measures: Check other fuel injection system components, such as fuel pressure regulators, for problems and repair or replace them as necessary.
Remember, to successfully resolve the P1247 code, it is important to diagnose the vehicle to determine the specific cause of the problem, and then make the appropriate repairs or replacement parts. If you are unsure of your skills or experience, it is recommended that you contact a qualified auto mechanic or auto repair shop.
