AutoCodes – Nissan – C1125 Nissan

C1125 Nissan Code - Rear Left Output ABS Solenoid

Quick Answer

The control unit computes the wheel rotating speed by the signal sent from the sensor. Common causes include Faulty ABS Actuator/Electric Unit, ABS Actuator/Electric Unit harness is open or shorted, ABS Actuator/Electric Unit poor electrical connection. 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: C1125 Nissan indicates Rear Left Output ABS Solenoid.
Common causes: Common causes include Faulty ABS Actuator/Electric Unit, ABS Actuator/Electric Unit harness is open or shorted, ABS Actuator/Electric Unit poor electrical connection.
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.

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Code Popularity 14,586

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 16, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code C1125 Nissan Description

The control unit computes the wheel rotating speed by the signal sent from the sensor. Then it supplies a DC current to the actuator solenoid valve. It also controls ON-OFF operation of the solenoid valve relay and motor relay. If any electrical malfunction should be detected in the system, the control unit causes the warning lamp to turn on. In this condition, the ABS will be deactivated by the control unit, and the vehicle's brake system reverts to normal operation.
The ABS actuator and electric unit (control unit) contains: An electric motor and pump, Two relays, Eight solenoid valves ( each inlet and outlet for LH front, RH front, LH rear, RH rear), and ABS control unit.
These components control the hydraulic circuit that increases, holds or decreases hydraulic pressure to all or individual wheels. The ABS actuator and electric unit (control unit) cannot be disassembled and must be replaced as an assembly.

OBDII Code C1125 Nissan - Rear Left Output ABS Solenoid - AutoCodes.com — C1125 Nissan Code - Rear Left Output ABS Solenoid

What does this mean?

What are the Possible Causes of the DTC C1125 Nissan?

Faulty ABS Actuator/Electric Unit
ABS Actuator/Electric Unit harness is open or shorted
ABS Actuator/Electric Unit poor electrical connection

How to Fix the DTC C1125 Nissan?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

The ABS has an electronic control unit to control major functions. The control unit accepts input signals from sensors and controls operation of the actuator. It is also important to check for conventional problems such as air leaks in the booster or lines, lack of brake fluid, or other problems with the brake system.
It is much more difficult to diagnose a problem that occurs intermittently rather than continuously. Most intermittent problems are caused by poor electrical connections or faulty wiring. In this case, careful checking of suspicious circuits may help prevent the replacement of good parts.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C1125 Nissan code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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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 C1125 Nissan Code

1. What does the OBDII code C1125 mean for a Nissan?

C1125 indicates an issue with the Rear Left Output ABS Solenoid, which is part of the anti-lock braking system (ABS) responsible for controlling brake fluid pressure to the rear left wheel.

2. What are the common symptoms of code C1125 in a Nissan?

Symptoms may include the ABS warning light illuminated, reduced braking performance, or the ABS system failing to function properly.

3. What causes the C1125 code to appear on a Nissan?

Common causes include a faulty rear left ABS solenoid, damaged wiring or connectors, a malfunctioning ABS control module, or hydraulic pressure issues in the ABS system.

4. Can I still drive my Nissan with the C1125 code?

While the vehicle may still be drivable, the ABS system may not function as intended, increasing the risk of losing control during hard braking or slippery conditions.

5. How do I diagnose the C1125 code on a Nissan?

Start by inspecting the rear left ABS solenoid, its wiring, and connectors for damage or corrosion. Use a scan tool to check for additional ABS-related codes and perform tests on the ABS solenoid and control module.

6. How do you fix the Nissan C1125 code?

Repairs may involve replacing the faulty rear left ABS solenoid, repairing or replacing damaged wiring or connectors, or reprogramming or replacing the ABS control module if necessary.

7. How much does it cost to repair the C1125 code on a Nissan?

Repair costs vary depending on the root cause but may range from $150 to $500, including parts and labor.

8. Can a low brake fluid level cause the C1125 code to trigger?

Low brake fluid is unlikely to directly cause the C1125 code, but it can lead to ABS performance issues, so checking and maintaining proper fluid levels is important.

9. Will resetting the ABS system clear the C1125 code?

Resetting the ABS system may temporarily clear the code, but if the underlying issue is not resolved, the code will likely return.

10. What tools are needed to troubleshoot and repair the C1125 code?

You will need an OBDII scan tool capable of reading ABS codes, a multimeter for testing wiring and solenoids, and possibly a service manual for your specific Nissan model for guidance.