The automobile fault code P129F indicates a problem with the Fuel Pump and Level Sensor Assembly. When this fault code appears, the Engine Light or Service Engine Soon Warning Light will turn on.

The most common cause of this issue is a faulty Fuel Pump and Level Sensor Assembly, but it can also be due to an open or shorted harness, poor electrical connection, or a faulty Fuel Pump Driver Control Module.

To fix this problem, you should visually inspect the wiring harness and connectors for any damage.

Look for broken, bent, pushed out, or corroded pins on the connectors.

This repair is of moderate difficulty and should take approximately 1.0 hour to complete.

Repair Importance Level10.0 (Out of 10)
Estimated Repair TimeApproximately 1.0 hour
Repair Difficulty Level10.0 (Out of 10)

When the engine light is on or the service engine soon warning light is illuminated, it could be a sign of the p129f fault code.

  • The symptoms of the automobile fault code P129F include the Engine Light being ON or the Service Engine Soon Warning Light being illuminated.

The automobile fault code P129F can be caused by a faulty fuel pump and level sensor assembly, an open or shorted harness, a poor electrical connection in the circuit, or a faulty fuel pump driver control module.

  • The fault code P129F can be caused by: a faulty fuel pump and level sensor assembly, an open or shorted harness for the fuel pump and level sensor assembly, a poor electrical connection in the fuel pump and level sensor assembly circuit, and a faulty fuel pump driver control module.

To fix the automobile fault code p129f, start by checking the possible causes and visually inspecting the wiring harness and connectors for any damage or corrosion.

  • To fix the automobile fault code p129f, you need to: 1.
  • Check the possible causes mentioned above.
  • 2.
  • Visually inspect the wiring harness and connectors related to the fault code.
  • 3.
  • Look for any damaged components.
  • 4.
  • Check for broken, bent, pushed out, or corroded pins in the connectors.
  • The estimated repair time for this fix is 1.0 hour.

The automobile fault code P129F diagnosis and fixing cost is influenced by the estimated repair time of 1.0 hour.

Most auto repair shops typically charge between $75 and $150 per hour for their services.

The P129F fault code refers to a problem with the Fuel Pump Driver Control Module’s fuel pump speed signal.

This module sends reports of the actual fuel pump speed to the Engine Control Module (ECM) as serial data every 10 ms. The ECM then calculates the error between the commanded fuel pump speed and the reported speed from the Fuel Pump Driver Control Module.

If the fuel pump speed is outside a calibrated threshold, a Diagnostic Trouble Code (DTC) will be set. The DTC will be triggered if the difference between the commanded and actual fuel pump speed is outside the calibrated range for more than 7 seconds. This code indicates a potential issue with the fuel pump speed signal, which may require further diagnosis and repair.

What are the possible causes of the automobile fault code p129f and how can I visually inspect them?

If you’re seeing the engine light on or the service engine soon warning light, the fault code P129F could be the culprit. This code is often caused by a faulty fuel pump and level sensor assembly, an open or shorted harness, a poor electrical connection in the assembly circuit, or a faulty fuel pump driver control module. To visually inspect these potential causes, check the wiring harness and connectors for any damage. Look out for broken, bent, pushed out, or corroded pins on the connectors. Don’t forget to consider the possible causes listed above.

How can a faulty fuel pump and level sensor assembly lead to the engine light being on, and what steps can I take to fix it?

If you notice that your engine light is on or you see a service engine soon warning light, it could be due to a faulty fuel pump and level sensor assembly. This can happen if the assembly harness is open or shorted, if there is a poor electrical connection in the circuit, or if the fuel pump driver control module is faulty. To fix this issue, you should check the possible causes mentioned above. Take a close look at the wiring harness and connectors, visually inspect for any damage, and check for broken, bent, pushed out, or corroded pins in the connectors.

What should I do if I suspect that the fuel pump and level sensor assembly harness is open or shorted, and how can I check for poor electrical connections in the circuit?

If you suspect that the fuel pump and level sensor assembly harness is open or shorted, and you’re experiencing the symptom of the engine light being on, there are a few steps you can take to diagnose and fix the issue. First, visually inspect the wiring harness and connectors related to the fuel pump and level sensor assembly. Look for any signs of damage or corrosion. Additionally, check for broken, bent, pushed out, or corroded pins in the connectors. By checking these possible causes and inspecting the components, you can identify and resolve any poor electrical connections in the circuit.

p129f error fault code explained

If you’re seeing the Engine Light ON or the Service Engine Soon Warning Light, the issue could be a faulty Fuel Pump and Level Sensor Assembly or a problem with the wiring harness or connectors. To fix it, visually inspect the wiring and connectors for any damage, and check for broken, bent, pushed out, or corroded pins on the connectors.

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