C1138 Infiniti Code - 4-Wheel Active Steer Circuit
Quick Answer
The C1138 code in an Infiniti vehicle refers to a fault in the 4-wheel active steer circuit. Common causes include Faulty sensors, Damaged wiring harnesses, Malfunctioning control modules. 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
- C1138 Infiniti indicates 4-Wheel Active Steer Circuit.
- Common causes
- Common causes include Faulty sensors, Damaged wiring harnesses, Malfunctioning control modules.
- 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 C1138 Infiniti Description
The C1138 code in an Infiniti vehicle refers to a fault in the 4-wheel active steer circuit. The active steer system is designed to enhance the vehicle's handling and stability by adjusting the steering angle of the rear wheels based on driving conditions. This code indicates that there is a malfunction in the system, which can adversely affect the vehicle's performance and safety.
Common Causes of C1138 Infiniti
- Faulty sensors
- Damaged wiring harnesses
- Malfunctioning control modules
- Mechanical issues within the active steer system
- Water intrusion in the system
Symptoms of C1138 Infiniti
- Erratic steering response
- Uneven tire wear
- Vibration or shaking while driving
- Decreased handling and stability
- Electronic stability control system malfunctions
How to Fix C1138 Infiniti
- Diagnose the specific cause of the C1138 code using a diagnostic scanner and specialized tools.
- Inspect the sensors, wiring harnesses, and control modules for any visible damage or corrosion.
- Test the active steer system components for proper functionality and resistance levels.
- Replace any faulty sensors, wiring harnesses, or control modules as needed.
- Clear the code from the vehicle's computer system and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix C1138 Infiniti
The cost of repairing the 4-wheel active steer circuit in an Infiniti vehicle can vary depending on the specific cause of the issue and the extent of the damage. On average, the repair costs for this type of problem can range from $300 to $800, including parts and labor. However, it's important to note that labor rates at auto repair shops can vary significantly, with hourly rates typically ranging between $80 and $150. Factors such as location, vehicle make and model, and engine type can also influence the final repair costs. It's recommended to obtain quotes from multiple reputable auto repair shops to get a more accurate estimate for this repair.
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Frequently Asked Questions about C1138 Infiniti Code
1. What does the OBDII code C1138 mean for an Infiniti?
C1138 indicates an issue with the 4-Wheel Active Steer (4WAS) circuit, which is responsible for controlling the rear-wheel steering system for improved handling and stability.
2. What are the common symptoms of a C1138 code?
Common symptoms include a 4WAS warning light on the dashboard, reduced steering responsiveness, and potential difficulty in handling the vehicle, especially during cornering.
3. What causes the C1138 code to appear?
This code can be triggered by issues such as a faulty 4WAS control module, damaged wiring or connectors, or a malfunctioning rear steering actuator.
4. Can a C1138 code affect drivability?
Yes, it may affect drivability by reducing the responsiveness of the vehicle's steering, especially during high-speed maneuvers or tight turns.
5. How can I diagnose a C1138 code?
Diagnosis involves scanning for stored codes, inspecting the 4WAS wiring and connectors for damage, and testing the rear steering actuator and control module for proper operation.
6. Is it safe to drive with a C1138 code?
While the vehicle may still be drivable, it is not recommended to ignore the code as it can impact vehicle handling and safety.
7. How do I fix a C1138 code on my Infiniti?
Repairs may involve replacing a faulty 4WAS control module, repairing or replacing damaged wiring, or servicing the rear steering actuator.
8. Can a software update resolve a C1138 code?
In some cases, a software update for the 4WAS system from the dealership may resolve the issue if it is caused by a programming error.
9. What tools are needed to troubleshoot a C1138 code?
A professional OBDII scan tool, a multimeter for electrical testing, and Infiniti service manuals for reference are typically needed.
10. How much does it cost to fix a C1138 code?
Repair costs vary depending on the root cause but can range from $200 for wiring repairs to over $1,000 if the 4WAS control module or actuator needs replacement.
Discuss the causes and fixes for C1138 Infiniti OBDII Code
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Done replace engine so I open steering wiring and put it back but now 4WAS circut fault appear in ABS module
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Let me check if I can find more information. What model and year is your vehicle? Why did you open the steering wiring?
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