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Engine-Codes – Lexus – C1251 Lexus

C1251 Lexus Code - Open in Pump Motor Circuit

Quick Answer

The C1251 diagnostic trouble code on a Lexus indicates an open circuit in the pump motor circuit. Common causes include Damaged wiring or connectors in the pump motor circuit, Corrosion or moisture intrusion in the electrical connections, Faulty ABS pump motor. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
C1251 Lexus indicates Open in Pump Motor Circuit.
Common causes
Common causes include Damaged wiring or connectors in the pump motor circuit, Corrosion or moisture intrusion in the electrical connections, Faulty ABS pump motor.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 08, 2024
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Code C1251 Lexus Description

The C1251 diagnostic trouble code on a Lexus indicates an open circuit in the pump motor circuit. This means that there is a break or disconnection in the electrical circuit that controls the pump motor, which is a crucial component of the vehicle's brake system.

OBDII Code C1251 Lexus - Open in Pump Motor Circuit
C1251 Lexus Code - Open in Pump Motor Circuit

Common Causes of C1251 Lexus

  1. Damaged wiring or connectors in the pump motor circuit
  2. Corrosion or moisture intrusion in the electrical connections
  3. Faulty ABS pump motor
  4. Issues with the ABS control module
  5. Electrical system malfunctions

Symptoms of C1251 Lexus

  1. Illumination of the ABS warning light on the dashboard
  2. Decreased braking performance, especially in slippery conditions
  3. Unusual noises coming from the ABS pump motor
  4. ABS system failure messages on the vehicle's display
  5. Difficulty stopping the vehicle smoothly or evenly

How to Fix C1251 Lexus

  1. Begin by inspecting the wiring and connectors in the pump motor circuit for any signs of damage or corrosion. Repair or replace any damaged components as needed.
  2. Check the ABS pump motor and control module for proper functionality. Replace any faulty components.
  3. Clear the diagnostic trouble code from the vehicle's computer system using a diagnostic scan tool.
  4. Test drive the vehicle to ensure that the ABS system is functioning properly and that the warning light has been extinguished.
  5. If the issue persists, further diagnostic testing may be required to pinpoint the exact cause of the open circuit in the pump motor circuit.

Cost to Fix C1251 Lexus

The cost of repairing an open circuit in the pump motor circuit (C1251 code) on a Lexus can vary depending on the extent of the damage and the specific components that need to be replaced. In general, the repair costs for this issue can range from $200 to $800, including parts and labor. However, it's important to keep in mind that labor rates at auto repair shops can vary significantly, so it's advisable to obtain multiple quotes from different shops to ensure a fair price. Additionally, the cost of any necessary diagnostic testing or additional repairs may also impact the overall cost of addressing this issue.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about C1251 Lexus Code

1. What are the common symptoms of OBDII code C1251 in a Lexus related to an open in the pump motor circuit?

The common symptoms include the ABS warning light illuminating on the dashboard, loss of ABS functionality, and potential issues with the vehicle's stability and traction control systems.

2. What are the possible causes of the C1251 code indicating an open in the pump motor circuit in a Lexus?

Potential causes include damaged wiring or connectors in the pump motor circuit, a faulty ABS pump motor, a malfunctioning ABS control unit, or issues with the vehicle's power supply to the ABS system.

3. How can I diagnose the source of the open in the pump motor circuit causing the C1251 code in my Lexus?

You can use a multimeter to test the wiring and connectors for continuity, inspect for any visible damage, check the ABS pump motor for proper function, and perform a thorough inspection of the ABS system components.

4. Is it safe to drive my Lexus with the OBDII code C1251 indicating an open in the pump motor circuit?

It is not recommended to drive the vehicle with this issue, as it can affect the operation of the ABS system, potentially compromising braking performance and overall safety. It is advised to address the problem promptly.

5. Can I repair the open in the pump motor circuit triggering the C1251 code in my Lexus on my own?

Depending on your level of automotive expertise, you may be able to address the issue by inspecting the wiring, connectors, and ABS components for damage or faults. However, complex repairs involving the ABS system may require professional assistance.

6. How much does it typically cost to repair the open in the pump motor circuit causing the C1251 code in a Lexus?

The cost of repairs can vary depending on the specific cause of the issue and the extent of the damage. It is advisable to consult a mechanic or dealership for an accurate diagnosis and cost estimate.

7. Can a DIY enthusiast reset the OBDII code C1251 related to an open in the pump motor circuit in a Lexus?

While clearing the error code is possible with an OBDII scanner, it is essential to address the underlying issue causing the fault code to prevent potential safety risks and ensure the proper functioning of the ABS system.

8. How urgent is it to address the C1251 code indicating an open in the pump motor circuit in a Lexus?

It is important to address the issue promptly to prevent potential safety hazards associated with compromised ABS functionality. Ignoring the problem can lead to reduced braking performance and stability control.

9. Will the C1251 code in a Lexus reset on its own after the issue with the open in the pump motor circuit is fixed?

In some cases, the code may reset on its own after the problem is resolved and the vehicle undergoes a certain number of successful drive cycles. However, manually clearing the code with an OBDII scanner may be necessary.

10. Are there any preventive measures to avoid encountering the C1251 code related to an open in the pump motor circuit in a Lexus?

Regular maintenance of the ABS system, including inspecting wiring and connectors for damage, can help prevent issues leading to the C1251 fault code. Additionally, driving cautiously to avoid sudden stops or impacts can help preserve the system's components.

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