[SOLVED] P1200 Code: Fuel Pump Relay/Ecu Circuit Malfunction – Quick Fix Guide!

The automobile fault code P1200 indicates a problem with the fuel pump ECU. This can be identified by the engine light being on or the service engine soon warning light. The possible causes include a faulty fuel pump ECU, an open or shorted fuel pump ECU harness, poor electrical connection in the fuel pump ECU circuit, a faulty fuel pump, or a faulty engine control module (ECM).

To fix this issue, you should visually inspect the wiring harness and connectors, checking for any damage or broken, bent, pushed out, or corroded pins.

The repair time for this problem is estimated to be 1.0.

It is important to address this issue promptly to ensure proper functioning of the fuel system.

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 p1200 fault code.

  • The symptoms of the automobile fault code p1200 include the Engine Light being ON or the Service Engine Soon Warning Light being illuminated.

The automobile fault code p1200 can be caused by a faulty Fuel Pump ECU, open or shorted Fuel Pump ECU harness, poor electrical connection in the Fuel Pump ECU circuit, a faulty Fuel Pump, or a faulty Engine Control Module (ECM).

  • The fault code P1200 can be caused by the following: a faulty fuel pump ECU, an open or shorted fuel pump ECU harness, a poor electrical connection in the fuel pump ECU circuit, a faulty fuel pump, and a faulty engine control module (ECM).

To fix the p1200 fault code, start by visually inspecting the wiring harness, connectors, and components for any damage or corrosion.

  • To fix the automobile fault code p1200, follow these steps: 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 factors influencing the cost of diagnosing and fixing the automobile fault code p1200 are the estimated repair time of 1.0 hour and the typical hourly rate charged by auto repair shops, which ranges between $75 and $150.

The P1200 fault code indicates a malfunction in the fuel pump relay or ECU circuit. The fuel pump speed is controlled at three different steps based on the engine’s condition. When the engine starts or under heavy loads with high engine speed, the ECM sends a high signal to the fuel pump ECU, causing the fuel pump to operate at high speed.

Under heavy loads with low engine speed, the ECM sends a mid signal, resulting in the fuel pump operating at medium speed. During idling or light loads, the ECM sends a low signal, causing the fuel pump to operate at low speed. If there is an issue with the fuel pump relay or ECU circuit, this fault code will be triggered.

What are the possible causes for the automobile fault code p1200 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 P1200 could be the culprit. This code can be caused by a faulty fuel pump ECU, an open or shorted fuel pump ECU harness, a poor electrical connection in the fuel pump ECU circuit, a faulty fuel pump, or a faulty engine control module (ECM). To visually inspect these possible causes, check the related wiring harness and connectors for any damage. Look out for broken, bent, pushed out, or corroded connector pins.

How can a faulty Fuel Pump ECU or a poor electrical connection in the Fuel Pump ECU circuit lead to the engine light being ON?

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 ECU or a poor electrical connection in the Fuel Pump ECU circuit. This can happen if the Fuel Pump ECU is faulty, if the harness is open or shorted, if there is a poor electrical connection in the circuit, or if the Fuel Pump or Engine Control Module (ECM) is faulty. To fix this issue, you should check the possible causes mentioned above. Take a close look at the wiring harness and connectors, checking for any damage or broken, bent, pushed out, or corroded pins in the connectors.

What steps should I take to fix the p1200 fault code and ensure that the related wiring harness and connectors are in good condition?

To fix the p1200 fault code and ensure the wiring harness and connectors are in good condition, start by visually inspecting the related wiring harness and connectors. Look for any damaged components and check for broken, bent, pushed out, or corroded connector pins. Additionally, check the “Possible Causes” listed above and address any issues with the fuel pump ECU, fuel pump, or engine control module (ECM).

p1200 error fault code explained

If your engine light is on, it could be due to a faulty fuel pump ECU, open or shorted harness, poor electrical connection, faulty fuel pump, or faulty engine control module (ECM).

To fix the issue, visually inspect the wiring harness and connectors for any damage, and check for broken, bent, pushed out, or corroded connector pins.

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