What is the code C1391 on a 2013 Lexus rx450h?
The Lexus RX450h is a popular hybrid SUV that has been on the market since 2013. Like many modern vehicles, it utilizes an onboard diagnostic system to monitor various components and alert the driver of any issues. One such diagnostic code that may appear is C1391, which can indicate a problem with the vehicle's hybrid system. Let's dive into what this code means and how it can be addressed.
What is Code C1391?
Code C1391 is a diagnostic trouble code that is specific to the Lexus RX450h and its hybrid powertrain. This code is triggered when the vehicle's computer detects an issue with the hybrid system's high-voltage battery. The code indicates a problem with the battery's state of charge (SOC) sensor or the associated wiring and connections.
Potential Causes of Code C1391
- Faulty state of charge (SOC) sensor
- Damaged or corroded wiring or connections in the hybrid battery system
- Malfunctioning hybrid battery control module
- Degraded or failing hybrid battery pack
When the vehicle's computer detects an issue with the hybrid battery's state of charge, it sets the C1391 code to alert the driver that attention is needed.
Diagnosing and Resolving Code C1391
To diagnose and resolve the C1391 code, a technician will typically follow these steps:
- Retrieve the diagnostic trouble code using an OBD-II scanner or the vehicle's onboard diagnostic system.
- Inspect the hybrid battery's state of charge sensor and associated wiring for any signs of damage or corrosion.
- Test the hybrid battery control module to ensure it is functioning properly.
- If the sensor or wiring is faulty, replace the necessary components.
- If the hybrid battery pack is degraded, it may need to be replaced.
Resolving the C1391 code is crucial to maintaining the proper operation of the Lexus RX450h's hybrid system and ensuring the vehicle's overall reliability and performance.
What is the code C1391 on a 2011 Prius?
This Prius arrived with a C1391 trouble code, which stored due to brake system supply pressure bleeding down. This pressure loss is due to internal fluid leakage within the "Brake Booster Assembly with Master Cylinder."
How much does it cost to fix accumulator?
The average cost for an ABS Accumulator Replacement is between $488 and $517. Labor costs are estimated between $114 and $143 while parts are typically priced around $374. This range does not include taxes and fees, and does not factor in your unique location. Related repairs may also be needed.
How much does a new accumulator cost?
Bladder Accumulator
| Product Code | Description | TotalEx. VATIncl. VAT |
|---|---|---|
| Product CodeQB035-A00-A00-341D | 35L Bladder Accumulator 2" BSP Female | £1,753.69Ex. VAT £2,104.43Incl. VAT |
| Product CodeQB050-A00-A00-341D | 50L Bladder Accumulator 2" BSP Female | £2,089.02Ex. VAT £2,506.82Incl. VAT |
How to fix code C1391 lexus?
Unfortunately when you have this code you have only have one option and that is to replace the ABS actuator/accumulator assembly. There's an internal leak. There have been issues with those. The vehicle skid control and ABS light will come on whenever this problem occurs.
What happens if your accumulator goes bad?
Driving with a faulty A/C accumulator can be stressful because of the leaks and cooling issues that come with it. This makes for an uncomfortable ride, especially during the summer when the heat is at its peak.
What is a C1391 abnormal leak accumulator?
The C1391 code on your 2010 Prius indicates an abnormal leak in the brake accumulator pressure, often related to the brake booster and master cylinder assembly. The buzzing sound you hear is likely the brake actuator pump maintaining hydraulic pressure.
What happens when brake accumulator fails?
When it fails, the seal breaks and the ABS accumulator can no longer store and build this pressure. Sometimes, a faulty diaphragm may even cause fluid to leak into the component, preventing it from filling with air at all. This can be extremely dangerous, as it cannot aid in hard braking when you need it most.
How do I know if my accumulator is bad?
Accumulators don't typically leak, but if they do, you'll see refrigerant oil on or below the accumulator, but no refrigerant, because the refrigerant's boiling point is about -22 degrees Fahrenheit.
What is the life expectancy of an accumulator?
The typical design life for a hydraulic accumulator is 12 years. In many jurisdictions, periodic inspection and recertification is required. This particularly applies to hydraulic accumulators which have relatively large volumes and operate at high working pressures.
What is the recall on the Toyota C1391?
Toyota is providing coverage for repairs related to the certain internal malfunctions of the brake booster assemblies. One or more of the following specific Diagnostic Trouble Codes (DTCs) C1391, C1252, C1256 or C1253 will be stored in the vehicles memory to be used as verification.
