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Home / DTC / C1702 — Variant Coding Error

C1702 — Variant Coding Error

Detailed page for trouble code C1702.

34,405codes
59brands
11,914generic
22,491specific
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Code

C1702

HYUNDAI C — Chassis

Variant Coding Error

Brand: HYUNDAI
Type: C — Chassis
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Incorrect coding/programming after module replacement or update
  • Replacement module with wrong part number or calibration
  • Incomplete or failed software update
  • Corrupted coding data in the module
  • Mismatch between vehicle VIN/options and module configuration
  • CAN bus communication errors during coding

Symptoms

  • Related system warning lamp(s) illuminated
  • Certain vehicle features disabled or behaving incorrectly
  • Multiple modules reporting configuration or communication faults
  • Stored variant-coding or programming-related DTCs
  • Possible limp or restricted modes for affected systems

What to check

  • Read all stored and pending DTCs and freeze-frame data with OEM-level scanner
  • Check module part number, hardware and software/calibration IDs
  • Verify vehicle VIN and option list against module coding
  • Inspect connectors and CAN bus wiring for damage or corrosion
  • Check battery voltage and supply stability during programming
  • Review recent repair history for module replacements or software updates

Signal parameters

  • Module part number (HW) and software/calibration ID (SW/Cal ID)
  • Variant coding bytes / option byte values
  • Stored VIN in the module
  • Module address and UDS session status
  • CAN bus status and message counters
  • Supply voltage and ground integrity

Diagnostic algorithm

  1. Connect OEM-level diagnostic tool and read all DTCs and freeze-frame information.
  2. Record module HW/SW part numbers, calibration IDs and stored VIN/variant bytes.
  3. Verify vehicle option content (equipment list) and compare to module coding.
  4. Inspect connectors and CAN wiring for continuity, corrosion or damage; verify battery voltage.
  5. If coding mismatch confirmed, re-code the module using manufacturer diagnostic software to match vehicle VIN/options.
  6. If a software update is available or required, perform firmware/calibration update following OEM procedure.
  7. Clear DTCs and perform a guided test or vehicle function check for the affected system(s).
  8. Perform a test drive and monitor for recurrence; if fault returns, re-check communication integrity and consider replacement with correctly coded module.
  9. If programming repeatedly fails, investigate network interference, ground issues, or intermittent power loss during programming.

Likely causes

  • Module was replaced but not coded to vehicle options
  • Module retains previous vehicle's variant coding
  • Software update failed or used incorrect calibration file
  • Connector/can network faults interrupted programming
  • VIN or option byte incorrect in module memory

Fault status

⚠️ Status
Module variant/option coding does not match vehicle configuration or contains invalid data. Re-coding or software update required; features may be disabled until corrected.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

C1700 C1701 U0100 U0401 P0602 P0606
371

Browse 371 HYUNDAI manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

HYUNDAI

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Code

C1702

LAND ROVER C — Chassis

Right rear corner sensor - short circuit to battery

Brand: LAND ROVER
Type: C — Chassis
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Incorrect coding/programming after module replacement or update
  • Replacement module with wrong part number or calibration
  • Incomplete or failed software update
  • Corrupted coding data in the module
  • Mismatch between vehicle VIN/options and module configuration
  • CAN bus communication errors during coding

Symptoms

  • Related system warning lamp(s) illuminated
  • Certain vehicle features disabled or behaving incorrectly
  • Multiple modules reporting configuration or communication faults
  • Stored variant-coding or programming-related DTCs
  • Possible limp or restricted modes for affected systems

What to check

  • Read all stored and pending DTCs and freeze-frame data with OEM-level scanner
  • Check module part number, hardware and software/calibration IDs
  • Verify vehicle VIN and option list against module coding
  • Inspect connectors and CAN bus wiring for damage or corrosion
  • Check battery voltage and supply stability during programming
  • Review recent repair history for module replacements or software updates

Signal parameters

  • Module part number (HW) and software/calibration ID (SW/Cal ID)
  • Variant coding bytes / option byte values
  • Stored VIN in the module
  • Module address and UDS session status
  • CAN bus status and message counters
  • Supply voltage and ground integrity

Diagnostic algorithm

  1. Connect OEM-level diagnostic tool and read all DTCs and freeze-frame information.
  2. Record module HW/SW part numbers, calibration IDs and stored VIN/variant bytes.
  3. Verify vehicle option content (equipment list) and compare to module coding.
  4. Inspect connectors and CAN wiring for continuity, corrosion or damage; verify battery voltage.
  5. If coding mismatch confirmed, re-code the module using manufacturer diagnostic software to match vehicle VIN/options.
  6. If a software update is available or required, perform firmware/calibration update following OEM procedure.
  7. Clear DTCs and perform a guided test or vehicle function check for the affected system(s).
  8. Perform a test drive and monitor for recurrence; if fault returns, re-check communication integrity and consider replacement with correctly coded module.
  9. If programming repeatedly fails, investigate network interference, ground issues, or intermittent power loss during programming.

Likely causes

  • Module was replaced but not coded to vehicle options
  • Module retains previous vehicle's variant coding
  • Software update failed or used incorrect calibration file
  • Connector/can network faults interrupted programming
  • VIN or option byte incorrect in module memory

Fault status

⚠️ Status
Module variant/option coding does not match vehicle configuration or contains invalid data. Re-coding or software update required; features may be disabled until corrected.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

C1700 C1701 U0100 U0401 P0602 P0606
320

Browse 320 LAND ROVER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

LAND ROVER

Your experience will help others
+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email
Code

C1702

Other C — Chassis

RightRear Sensor Circuit Short to Vbat

Brand: Other
Type: C — Chassis
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Incorrect coding/programming after module replacement or update
  • Replacement module with wrong part number or calibration
  • Incomplete or failed software update
  • Corrupted coding data in the module
  • Mismatch between vehicle VIN/options and module configuration
  • CAN bus communication errors during coding

Symptoms

  • Related system warning lamp(s) illuminated
  • Certain vehicle features disabled or behaving incorrectly
  • Multiple modules reporting configuration or communication faults
  • Stored variant-coding or programming-related DTCs
  • Possible limp or restricted modes for affected systems

What to check

  • Read all stored and pending DTCs and freeze-frame data with OEM-level scanner
  • Check module part number, hardware and software/calibration IDs
  • Verify vehicle VIN and option list against module coding
  • Inspect connectors and CAN bus wiring for damage or corrosion
  • Check battery voltage and supply stability during programming
  • Review recent repair history for module replacements or software updates

Signal parameters

  • Module part number (HW) and software/calibration ID (SW/Cal ID)
  • Variant coding bytes / option byte values
  • Stored VIN in the module
  • Module address and UDS session status
  • CAN bus status and message counters
  • Supply voltage and ground integrity

Diagnostic algorithm

  1. Connect OEM-level diagnostic tool and read all DTCs and freeze-frame information.
  2. Record module HW/SW part numbers, calibration IDs and stored VIN/variant bytes.
  3. Verify vehicle option content (equipment list) and compare to module coding.
  4. Inspect connectors and CAN wiring for continuity, corrosion or damage; verify battery voltage.
  5. If coding mismatch confirmed, re-code the module using manufacturer diagnostic software to match vehicle VIN/options.
  6. If a software update is available or required, perform firmware/calibration update following OEM procedure.
  7. Clear DTCs and perform a guided test or vehicle function check for the affected system(s).
  8. Perform a test drive and monitor for recurrence; if fault returns, re-check communication integrity and consider replacement with correctly coded module.
  9. If programming repeatedly fails, investigate network interference, ground issues, or intermittent power loss during programming.

Likely causes

  • Module was replaced but not coded to vehicle options
  • Module retains previous vehicle's variant coding
  • Software update failed or used incorrect calibration file
  • Connector/can network faults interrupted programming
  • VIN or option byte incorrect in module memory

Fault status

⚠️ Status
Module variant/option coding does not match vehicle configuration or contains invalid data. Re-coding or software update required; features may be disabled until corrected.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

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C1700 C1701 U0100 U0401 P0602 P0606
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