C1477 Code - High Pressure Hydraulic Circuit Leakage Plausibility Failure
Quick Answer
The Hydraulic Control Unit (HCU) monitors the High Pressure Hydraulic Circuit. Common causes include Brake System Bleeding, Faulty Hydraulic Control Unit (HCU), Hydraulic Control Unit (HCU) harness is open or shorted. 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
- C1477 indicates High Pressure Hydraulic Circuit Leakage Plausibility Failure.
- Common causes
- Common causes include Brake System Bleeding, Faulty Hydraulic Control Unit (HCU), Hydraulic Control Unit (HCU) harness is open or shorted.
- 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.
Code C1477 Description
What are the Possible Causes of the DTC C1477?
- Brake System Bleeding
- Faulty Hydraulic Control Unit (HCU)
- Hydraulic Control Unit (HCU) harness is open or shorted
- Hydraulic Control Unit (HCU) circuit poor electrical connection
How to Fix the DTC C1477?
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 C1477 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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Get the C1477 code diagnosed by a professional: Find a repair shop in your area
Information for Specific Makes
- C1477 Chrysler — Transfer Case Clutch Over Temperature
- C1477 Dodge — Transfer Case Clutch Over Temperature
- C1477 Ford — High Pressure Hydraulic Circuit Leakage Plausibility Failure
- C1477 Jeep — Transfer Case Clutch Over Temperature
- C1477 Lincoln — High Pressure Hydraulic Circuit Leakage Plausibility Failure
- C1477 Mercury — High Pressure Hydraulic Circuit Leakage Plausibility Failure
Frequently Asked Questions about C1477 Code
1. What are the common symptoms of OBDII code C1477 (High Pressure Hydraulic Circuit Leakage Plausibility Failure)?
- Common symptoms include a soft or spongy brake pedal feel, brake fluid leaks, illuminated brake warning lights, and reduced braking performance.
2. What can cause OBDII code C1477 to trigger?
- Code C1477 is typically triggered by a high-pressure hydraulic circuit leakage in the brake system, often caused by damaged brake lines, deteriorated seals, or faulty hydraulic components.
3. How serious is OBDII code C1477 (High Pressure Hydraulic Circuit Leakage Plausibility Failure)?
- Code C1477 indicates a potential safety hazard as it relates to the brake system, which is a critical component for vehicle control. It should be addressed promptly to ensure safe operation of the vehicle.
4. Can driving with OBDII code C1477 active cause further damage?
- Continuing to drive with code C1477 active can lead to deteriorating brake performance, potential loss of braking power, and increased risk of brake system failure, posing a serious safety concern.
5. How is OBDII code C1477 diagnosed?
- Diagnosis of code C1477 typically involves a visual inspection of the brake system for leaks, testing of hydraulic components for proper function, and using a scan tool to monitor sensor data related to the high-pressure hydraulic circuit.
6. What are the recommended repair steps for OBDII code C1477?
- Repair for code C1477 often involves repairing or replacing damaged brake lines, seals, or hydraulic components causing the high-pressure leakage. It may also require bleeding the brake system to remove air and ensure proper operation.
7. Can OBDII code C1477 be reset without fixing the underlying issue?
- Resetting code C1477 without addressing the root cause, such as fixing the high-pressure hydraulic circuit leakage, may temporarily clear the code but will not resolve the safety concern or prevent it from reoccurring.
8. Are there any DIY repair tips for addressing OBDII code C1477?
- DIY repair for code C1477 may be challenging due to the critical nature of the brake system. It is recommended to consult a qualified mechanic or brake specialist for proper diagnosis and repair to ensure safety and proper function.
9. How much does it typically cost to repair OBDII code C1477?
- The cost of repairing code C1477 can vary depending on the extent of damage and parts needing replacement. Costs may include labor for diagnosis and repair, parts such as brake lines or hydraulic components, and brake fluid.
10. Can regular maintenance help prevent OBDII code C1477 from occurring?
- Regular maintenance, including brake system inspections, fluid checks, and component replacements as recommended by the manufacturer, can help prevent issues like code C1477 by identifying and addressing potential problems before they escalate.
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