AutoCodes – Generic – C1126

C1126 Code - Rear Right Input 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
C1126 indicates Rear Right Input 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 16,541
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Aug 16, 2020
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Code C1126 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 C1126 - Rear Right Input ABS Solenoid - AutoCodes.com
C1126 Code - Rear Right Input ABS Solenoid

What are the Possible Causes of the DTC C1126?

  • 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 C1126?

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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C1126 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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Information for Specific Makes

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 C1126 Code

1. What are the common symptoms of OBDII code C1126 (Rear Right Input ABS Solenoid)?

- Common symptoms include the ABS warning light illuminating on the dashboard, decreased braking performance, and potential wheel lock-up during braking.

2. What are the possible causes of OBDII code C1126?

- Possible causes include a faulty ABS solenoid in the rear right wheel, damaged wiring or connectors in the ABS system, or a malfunctioning ABS control module.

3. How can I diagnose OBDII code C1126?

- Diagnosis involves using an OBDII scanner to retrieve the trouble code, inspecting the ABS solenoid and its wiring for damage, and testing the ABS system components for proper functioning.

4. Can I still drive my vehicle with OBDII code C1126?

- It is not recommended to drive your vehicle with OBDII code C1126, as it may compromise the effectiveness of your ABS system and lead to unsafe driving conditions.

5. How can I repair OBDII code C1126?

- Repair may involve replacing the faulty ABS solenoid in the rear right wheel, repairing damaged wiring or connectors, or resetting the ABS system after addressing any underlying issues.

6. Will OBDII code C1126 cause my vehicle to fail an emissions test?

- OBDII code C1126 is related to the ABS system and should not directly impact emissions. However, it is still important to address the issue promptly for overall vehicle safety.

7. Are there any DIY repair tips for OBDII code C1126?

- DIY repair for this code may be challenging due to the complexity of the ABS system. It is recommended to consult a professional mechanic for accurate diagnosis and repair.

8. How much does it typically cost to repair OBDII code C1126?

- Repair costs for OBDII code C1126 can vary depending on the underlying issue and the labor rates in your area. It is advisable to obtain quotes from different mechanics for comparison.

9. Can OBDII code C1126 be intermittent or sporadic?

- Yes, OBDII code C1126 can be intermittent, especially if the issue is related to loose wiring or a temporary fault in the ABS system. It is important to address intermittent issues promptly.

10. Is it safe to reset the OBDII code C1126 without repairing the underlying issue?

- It is not recommended to simply reset the code without addressing the underlying problem, as it may lead to recurring issues with the ABS system and compromise your vehicle's safety.

1. What are common symptoms of OBDII code C1126 (Rear Right Input ABS Solenoid)?

- Common symptoms include the ABS warning light being illuminated on the dashboard, erratic braking behavior, and potential loss of traction control.

2. What can cause OBDII code C1126 to trigger?

- The code C1126 is triggered when there is a fault detected with the rear right input ABS solenoid, which could be due to a malfunction in the solenoid itself, wiring issues, or a problem with the ABS control module.

3. How can I diagnose the issue related to OBDII code C1126?

- Diagnosing the problem requires using an OBDII scanner to retrieve the specific code, followed by a thorough inspection of the rear right ABS solenoid, its wiring, connectors, and the ABS control module.

4. What are some possible repair options for resolving OBDII code C1126?

- Repair options may include replacing the rear right ABS solenoid, repairing any damaged wiring or connectors, or reprogramming the ABS control module if necessary.

5. Can I drive my vehicle with OBDII code C1126 present?

- It is not recommended to drive the vehicle with an active ABS fault code like C1126, as it can affect the proper functioning of the anti-lock braking system and traction control, potentially compromising safety.

6. How much does it typically cost to repair OBDII code C1126?

- The cost of repairing OBDII code C1126 can vary depending on the exact cause of the issue, but it may involve parts and labor costs ranging from $200 to $500 or more.

7. Are there any DIY tips for addressing OBDII code C1126?

- DIY tips may include visually inspecting the rear right ABS solenoid and its connections for any obvious damage, checking and cleaning the wiring harness, and ensuring proper electrical connections.

8. What are the long-term effects of ignoring OBDII code C1126?

- Ignoring OBDII code C1126 can lead to potential safety risks due to compromised ABS and traction control systems, as well as increased wear on other brake components over time.

9. Is it necessary to reset the OBDII system after repairing OBDII code C1126?

- Yes, it is recommended to reset the OBDII system after repairing OBDII code C1126 to clear the fault code and ensure proper functionality of the ABS system.

10. Can extreme weather conditions affect the triggering of OBDII code C1126?

- Extreme weather conditions such as excessive heat or cold can potentially exacerbate existing issues with the rear right input ABS solenoid, leading to the triggering of code C1126.

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