C1464 — Pressure Transducer Redundant / Secondary Signal Faulted #

Note: The wording of this DTC (Diagnostic Trouble Code) may differ depending on the vehicle manufacturer.

• Pressure Transducer Redundant / Secondary Signal Faulted (Generic/Standard Label)
• Pressure Sensor 2 Circuit Malfunction (Ford)
• Redundant Brake Pressure Sensor Signal Fault (Toyota)
• Hydraulic Pressure Sensor B Circuit Failure (GM/Chevrolet)
• Brake Pressure Transducer 2 Signal Error (Nissan)

Summary of DTC C1464 #

The C1464 code indicates that the redundant or secondary signal from a pressure transducer (a sensor that converts pressure into an electrical signal) is not behaving as expected. This sensor is typically found in systems like the ABS (Anti-lock Braking System) or brake pressure monitoring. The code is set when the ECU (Engine Control Unit) or ABS module detects a mismatch or fault in the backup signal, which is designed to provide system reliability through redundancy. This issue may affect the vehicle’s ability to monitor or control brake pressure accurately, which can compromise safety functions. Prompt attention is recommended to avoid unexpected braking performance issues.

Frequent Symptoms for DTC C1464 #

When C1464 is present, the vehicle may exhibit a range of symptoms, primarily related to brake system operation and warning indicators. Because the redundant or secondary signal is integral to system safety, even minor faults can trigger visible alerts or changes in vehicle behavior. Typical symptoms include:

• ABS warning light illuminated on the dashboard
• Traction control (TCS/ESC) light on
• Possible brake warning message or alert
• Loss or reduction of ABS function
• Unusual pedal feel (hard or inconsistent)
• Intermittent activation of ABS or traction control during driving
• In rare cases, longer stopping distances or unpredictable braking response

Probable Causes for DTC C1464 #

The causes of C1464 are most often related to the pressure transducer itself, its electrical circuit, or the related control module. Some causes are more prevalent than others. Here’s the most likely order:

1. Faulty pressure transducer (sensor failure, internal short, or open)
2. Wiring or connector issues (corrosion, damage, loose or bent pins)
3. Signal circuit failure (broken wire, short to power/ground)
4. Faulty or failing ABS module/ECU
5. Moisture intrusion causing intermittent sensor signal errors
6. Incorrectly fitted or non-OEM replacement sensor

Step-by-Step Diagnostic for DTC C1464 #

Accurate diagnosis is essential before replacing any parts. The following steps help ensure a thorough, methodical approach, minimizing guesswork and unnecessary expenses:

• 1. Check for additional codes: Use a scan tool to look for other related ABS, brake, or sensor codes.
• 2. Inspect the pressure transducer and wiring: Visually examine the sensor, harness, and connector for signs of corrosion, moisture, or damage.
• 3. Test sensor output: Using a multimeter or scan tool, verify the output signals from both primary and redundant circuits as specified by OEM data.
• 4. Wiggle test: Manipulate the harness and connector while monitoring the signal for dropouts or fluctuations.
• 5. Check power and ground: Confirm proper voltage and ground at the sensor connector using a wiring diagram.
• 6. Inspect ABS module: If wiring and sensor are good, test the module’s inputs and outputs (OEM procedures may require advanced tools).
• 7. Verify sensor installation: Ensure the sensor is OEM, properly installed, and matches the vehicle’s specifications.

Possible Repairs for DTC C1464 #

Repairs should address the root cause identified during diagnostics. In many cases, resolving the issue restores full system function, clears warning lights, and returns the vehicle to normal operation. Depending on the findings, the following repairs may apply:

• Replace the faulty pressure transducer with a genuine OEM part
• Repair or replace damaged wiring or connectors at the sensor location
• Clean and protect connectors against future moisture intrusion
• Replace or reprogram the ABS module if internal faults are confirmed
• Correct installation errors if a new or aftermarket sensor was fitted improperly

Is It Safe to Drive with DTC C1464? #

Driving with code C1464 active is typically not recommended. While some vehicles may default to a safe “failsafe” mode, loss of accurate brake pressure monitoring can reduce ABS or stability system performance. This could result in longer stopping distances or unpredictable handling, especially in slippery conditions. For your safety and that of others, have the system inspected and repaired as soon as possible.

Vehicles Most Commonly Affected by DTC C1464 #

This code is most frequently reported on vehicles equipped with advanced ABS and stability control systems, particularly models from manufacturers emphasizing redundant safety features. Based on service data and OEM bulletins, commonly affected vehicles include:

• Ford (especially Fusion, Explorer, F-series trucks)
• Toyota (Camry, Highlander, Prius)
• Chevrolet/GMC (Silverado, Tahoe, Suburban)
• Nissan (Altima, Rogue, Pathfinder)
• Honda (Accord, CR-V)

However, the code can appear on any modern vehicle with redundant pressure sensors in brake or stability systems.

Common Mistakes & Best Practices with DTC C1464 #

Misdiagnosis and unnecessary part replacements are frequent with C1464, often due to skipping basic checks or assuming the sensor is always at fault. To avoid wasted time and expense, consider these best practices:

• Don’t replace the sensor without confirming the fault—test wiring and check for corrosion first
• Avoid aftermarket sensors unless certified compatible—OEM sensors are often required for redundancy circuits
• Always clear codes after repair and verify that the fault does not return during a road test
• Consult OEM diagnostic procedures if unsure—these can provide critical model-specific steps
• Protect connectors from future moisture with dielectric grease and proper sealing

Express FAQ for DTC C1464 #

Here are quick answers to common questions about C1464:

• Q: Can I reset the code myself?
  A: You can clear the code with a scan tool, but if the underlying problem isn’t fixed, the code will return. Permanent repairs are needed for safety.
• Q: Will my brakes fail if I keep driving?
  A: Total brake failure is unlikely, but ABS and stability functions may be impaired, especially during emergency or slippery driving. This increases risk—prompt service is highly recommended.
• Q: Is this a dealer-only repair?
  A: Not always, but some diagnostics and module programming may require dealer-level tools or expertise, especially for newer vehicles or if module replacement is needed.