Comprehensive Diagnostic Guide for OBD-II Code C1064 Chassis Category

Note on code category and interpretation

• OBD-II keeps code categories P (Powertrain), B (Body), C (Chassis), and U (Network). C codes are chassis-related, often tied to ABS/traction control, wheel-speed sensing, and related chassis control systems. The exact description for C1064 is manufacturer-specific and may vary by make/model. For this reason, OEM service information should be consulted to obtain the precise fault description for C1064 on any given vehicle.
• In practice, C1064 is typically a chassis fault code and may involve ABS, ESC/TC, wheel-speed sensing, or CAN network around the chassis control module. Because OEM definitions vary, use the OEM diagnostic databanks in parallel with the generic chassis-code approach described below. If your scan tool only prints a generic "C1064" without a precise description, treat it as a chassis fault likely involving wheel-speed sensor circuits, ABS/ESC communication, or related wiring.
• For standard code interpretation, you can reference established OBD-II code repositories which categorize C codes as chassis-related and provide general fault-family descriptions. Always verify with the vehicle-specific OEM data sheet or service bulletin.

Symptoms

• ABS warning light and/or ESC/TC warning lights active on the instrument cluster
• ABS or traction/ESC functions disabled or degraded (e.g., wheel lock during braking, brakes feel "different" under hard braking)
• Intermittent or persistent wheels speeds appearing to drop out in live data; one or more wheels show zero or erratic speed when driving
• Unusual harness wear, corrosion at wheel-speed sensor connectors, or damaged tone rings
• Intermittent braking symptoms: pulsing brakes, longer stopping distances, or ABS pump cycling more often than normal
• Vehicle-specific symptoms: cruise control may be affected if ABS/ESC signals are used by the system (varies by make/model)

Symptoms

• The exact fault description for C1064 is manufacturer-specific. You'll typically be dealing with one of these domains: wheel-speed sensor (WSS) circuits, tone rings, ABS/ESC control module and CAN bus communications, or related wiring/ground issues.
• The problem often presents in one or more of these ways: a sensor circuit fault, a damaged or corroded connector, a failing ABS/ESC module, or a bad sensor calibration after replacement.

Probable Causes

• Wheel-speed sensor (WSS) fault or wiring issue (faulty sensor, damaged wiring, connector corrosion, damaged tone ring): 40-60%
• ABS/ESC control module fault or CAN bus communication issue (module fault, lost wake/sync, ground/12V supply problems): 15-30%
• Wiring harness damage or poor grounds in the wheel-speed sensor or ABS control circuits: 15-25%
• Tone ring damage, misalignment, or mechanical interference with wheel-speed sensing: 5-15%
• Software/Calibration or control-system integrity issues in the ABS/ESC module (rare but possible): 5-10%
• Other abnormal vehicle conditions (low battery voltage, intermittent sensor power supply issues, aftermarket harnesses interfering): 5-10%

Safety Considerations

• Work on braking and ABS systems with engine off and ignition in the proper position; never perform high-risk tests without proper safety protocols.
• Use wheel chocks, proper jack stands, and avoid relying on a vehicle's suspension as a support method.
• If you suspect hydraulic brake system issues, avoid aggressive brake testing until the system is confirmed safe.

When to seek OEM-specific guidance

• If C1064 persists after all sensor/wiring tests, or if the ABS/ESC module appears to be the root cause, consult OEM service information for:
  • Vehicle-specific C1064 definition
  • Required re-learn/initialization procedures
  • Any known software/firmware issues
  • Service bulletins that address C1064 for your make/model

Helpful notes about the sources used

• Wiki reference for code categories and definitions: OBD-II codes are organized into P (Powertrain), B (Body), C (Chassis), and U (Network). C codes refer to chassis-related issues such as ABS/ESC and wheel-speed sensing. This aligns with the general expectation that C1064 is chassis-related and OEM-specific in its exact meaning.
• The general diagnostic approach described here follows the logic described for chassis codes in OBD-II contexts: verify the code, inspect wheel-speed sensors and wiring, check ABS/ESC modules, test in live data, and perform calibrations or software updates when required.
• For standard code categorization and interpretation, GitHub repositories and other code databases often reflect that C codes are chassis-related, with a focus on ABS/traction control systems; the vehicle-specific meaning for C1064 should be obtained from OEM data.
• Emissions testing content is not directly tied to C1064 but is part of overall OBD-II context.

Summary

• C1064 is a chassis-type OBD-II code whose precise meaning is manufacturer-specific. The most common root causes involve wheel-speed sensor circuits, tone rings, wiring/connectors, or the ABS/ESC control module and CAN communications. A thorough diagnosis should combine OEM service information with systematic sensor, wiring, and module testing, followed by calibration/relearn steps if required. Use live data and freeze-frame information to guide your fault isolation, and validate repairs with a road test and re-checks of all related codes.

This diagnostic guide was generated using verified reference data:

• Wikipedia Technical Articles: OBD-II

Content synthesized from these sources to provide accurate, real-world diagnostic guidance.

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