Code
C1264
HUMMER
C — Chassis
Right Front Outlet Valve Solenoid Malfunction
Views:
UK: 11
EN: 11
RU: 9
AI status
Completed
Completed
100%
Causes
- Open or shorted solenoid coil
- Damaged wiring harness or poor connector contact at the solenoid
- Faulty ABS/Brake control module driver circuit
- Blown fuse or loss of power/ground to the solenoid
- Hydraulic blockage or internal valve mechanical failure
- Contamination or internal corrosion in the valve/solenoid assembly
Symptoms
- ABS warning lamp illuminated
- Traction control or stability control warning lamps may also be on
- Possible reduced ABS functionality or altered brake modulation
- ABS may engage unexpectedly or not engage when expected
- Diagnostic trouble code(s) stored for ABS/BCM
What to check
- Read and record all ABS/traction codes and freeze-frame data with a capable scan tool
- Perform a visual inspection of the right front wheel area: wiring, connector, and hydraulic lines for damage or leaks
- Check fuses and relays related to ABS/BRK power and module
- Back-probe solenoid connector and check for battery voltage with ignition ON and for proper ground
- Measure solenoid coil resistance and compare to service specification
- Use a scan tool to command and monitor the solenoid while observing voltage/current response
Signal parameters
- Solenoid coil resistance: typically in the low ohms range (consult vehicle service manual; example ranges 6–20 Ω)
- Supply voltage at connector with ignition ON: approx. battery voltage (~12 V) to the feed circuit
- Ground continuity to chassis/ABS module: near 0 Ω
- Actuation signal: PWM duty cycle or voltage pulses when commanded by ABS module (frequency and duty vary by vehicle — check service data)
- Current draw when energized: measured in amps, compare to service spec to detect internal shorts or opens
Diagnostic algorithm
- Connect a diagnostic scan tool, read all ABS/traction codes, and note freeze-frame or status data. Attempt to clear codes and see if C1264 returns.
- Visually inspect the right front outlet valve solenoid connector, wiring harness, and mounting for damage, corrosion, or fluid contamination.
- With ignition OFF, disconnect the solenoid connector and inspect terminals for corrosion or bent pins. Reconnect firmly.
- With ignition ON (or as specified), back-probe the connector: verify reference voltage/power and ground presence. Report any missing power or erratic voltage.
- Measure solenoid coil resistance at the connector with ignition OFF and compare to factory specification. An open or very high reading indicates a failed coil; a near-zero reading indicates a short.
- Use a scan tool to command the right front outlet solenoid ON/OFF while monitoring voltage and current. If commanded but no response, suspect solenoid or driver circuit.
- Perform a wiggle test on wiring while commanding the solenoid to reproduce intermittent faults. Repair any damaged wiring or connectors.
- If wiring and connector check good and solenoid coil resistance is within spec but solenoid still fails to actuate, test the ABS module driver outputs per factory procedure or consult module replacement/bench testing guidance.
- If the solenoid or valve assembly is proven faulty, replace the right front outlet valve solenoid (or the entire hydraulic modulator assembly as required). Bleed the brake system per manufacturer procedure if hydraulic lines were opened.
- Clear codes, perform ABS system self-tests with a scan tool, and road test to verify repair. Re-scan for codes and confirm no return of C1264.
Likely causes
- Damaged wiring or poor connector at the right front outlet solenoid
- Failed solenoid coil (open or short)
- Faulty ABS control module valve driver
- Blown fuse or missing power/ground to solenoid
Fault status
Status
Right Front Outlet Valve Solenoid Malfunction — ABS/traction control performance may be reduced. Fault stored; requires inspection and repair.
Repair difficulty: Medium
Diagnostic time: 1.0 - 3.0 hours
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Code
C1264
HYUNDAI
C — Chassis
Water Temperature Sensor- Abnormal
Views:
UK: 16
EN: 19
RU: 13
AI status
Completed
Completed
100%
Causes
- Open or shorted solenoid coil
- Damaged wiring harness or poor connector contact at the solenoid
- Faulty ABS/Brake control module driver circuit
- Blown fuse or loss of power/ground to the solenoid
- Hydraulic blockage or internal valve mechanical failure
- Contamination or internal corrosion in the valve/solenoid assembly
Symptoms
- ABS warning lamp illuminated
- Traction control or stability control warning lamps may also be on
- Possible reduced ABS functionality or altered brake modulation
- ABS may engage unexpectedly or not engage when expected
- Diagnostic trouble code(s) stored for ABS/BCM
What to check
- Read and record all ABS/traction codes and freeze-frame data with a capable scan tool
- Perform a visual inspection of the right front wheel area: wiring, connector, and hydraulic lines for damage or leaks
- Check fuses and relays related to ABS/BRK power and module
- Back-probe solenoid connector and check for battery voltage with ignition ON and for proper ground
- Measure solenoid coil resistance and compare to service specification
- Use a scan tool to command and monitor the solenoid while observing voltage/current response
Signal parameters
- Solenoid coil resistance: typically in the low ohms range (consult vehicle service manual; example ranges 6–20 Ω)
- Supply voltage at connector with ignition ON: approx. battery voltage (~12 V) to the feed circuit
- Ground continuity to chassis/ABS module: near 0 Ω
- Actuation signal: PWM duty cycle or voltage pulses when commanded by ABS module (frequency and duty vary by vehicle — check service data)
- Current draw when energized: measured in amps, compare to service spec to detect internal shorts or opens
Diagnostic algorithm
- Connect a diagnostic scan tool, read all ABS/traction codes, and note freeze-frame or status data. Attempt to clear codes and see if C1264 returns.
- Visually inspect the right front outlet valve solenoid connector, wiring harness, and mounting for damage, corrosion, or fluid contamination.
- With ignition OFF, disconnect the solenoid connector and inspect terminals for corrosion or bent pins. Reconnect firmly.
- With ignition ON (or as specified), back-probe the connector: verify reference voltage/power and ground presence. Report any missing power or erratic voltage.
- Measure solenoid coil resistance at the connector with ignition OFF and compare to factory specification. An open or very high reading indicates a failed coil; a near-zero reading indicates a short.
- Use a scan tool to command the right front outlet solenoid ON/OFF while monitoring voltage and current. If commanded but no response, suspect solenoid or driver circuit.
- Perform a wiggle test on wiring while commanding the solenoid to reproduce intermittent faults. Repair any damaged wiring or connectors.
- If wiring and connector check good and solenoid coil resistance is within spec but solenoid still fails to actuate, test the ABS module driver outputs per factory procedure or consult module replacement/bench testing guidance.
- If the solenoid or valve assembly is proven faulty, replace the right front outlet valve solenoid (or the entire hydraulic modulator assembly as required). Bleed the brake system per manufacturer procedure if hydraulic lines were opened.
- Clear codes, perform ABS system self-tests with a scan tool, and road test to verify repair. Re-scan for codes and confirm no return of C1264.
Likely causes
- Damaged wiring or poor connector at the right front outlet solenoid
- Failed solenoid coil (open or short)
- Faulty ABS control module valve driver
- Blown fuse or missing power/ground to solenoid
Fault status
Status
Right Front Outlet Valve Solenoid Malfunction — ABS/traction control performance may be reduced. Fault stored; requires inspection and repair.
Repair difficulty: Medium
Diagnostic time: 1.0 - 3.0 hours
Similar codes
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Code
C1264
Other
C — Chassis
Lamp Warning Relay Circuit Short To Battery
Views:
UK: 17
EN: 23
RU: 13
AI status
Completed
Completed
100%
Causes
- Open or shorted solenoid coil
- Damaged wiring harness or poor connector contact at the solenoid
- Faulty ABS/Brake control module driver circuit
- Blown fuse or loss of power/ground to the solenoid
- Hydraulic blockage or internal valve mechanical failure
- Contamination or internal corrosion in the valve/solenoid assembly
Symptoms
- ABS warning lamp illuminated
- Traction control or stability control warning lamps may also be on
- Possible reduced ABS functionality or altered brake modulation
- ABS may engage unexpectedly or not engage when expected
- Diagnostic trouble code(s) stored for ABS/BCM
What to check
- Read and record all ABS/traction codes and freeze-frame data with a capable scan tool
- Perform a visual inspection of the right front wheel area: wiring, connector, and hydraulic lines for damage or leaks
- Check fuses and relays related to ABS/BRK power and module
- Back-probe solenoid connector and check for battery voltage with ignition ON and for proper ground
- Measure solenoid coil resistance and compare to service specification
- Use a scan tool to command and monitor the solenoid while observing voltage/current response
Signal parameters
- Solenoid coil resistance: typically in the low ohms range (consult vehicle service manual; example ranges 6–20 Ω)
- Supply voltage at connector with ignition ON: approx. battery voltage (~12 V) to the feed circuit
- Ground continuity to chassis/ABS module: near 0 Ω
- Actuation signal: PWM duty cycle or voltage pulses when commanded by ABS module (frequency and duty vary by vehicle — check service data)
- Current draw when energized: measured in amps, compare to service spec to detect internal shorts or opens
Diagnostic algorithm
- Connect a diagnostic scan tool, read all ABS/traction codes, and note freeze-frame or status data. Attempt to clear codes and see if C1264 returns.
- Visually inspect the right front outlet valve solenoid connector, wiring harness, and mounting for damage, corrosion, or fluid contamination.
- With ignition OFF, disconnect the solenoid connector and inspect terminals for corrosion or bent pins. Reconnect firmly.
- With ignition ON (or as specified), back-probe the connector: verify reference voltage/power and ground presence. Report any missing power or erratic voltage.
- Measure solenoid coil resistance at the connector with ignition OFF and compare to factory specification. An open or very high reading indicates a failed coil; a near-zero reading indicates a short.
- Use a scan tool to command the right front outlet solenoid ON/OFF while monitoring voltage and current. If commanded but no response, suspect solenoid or driver circuit.
- Perform a wiggle test on wiring while commanding the solenoid to reproduce intermittent faults. Repair any damaged wiring or connectors.
- If wiring and connector check good and solenoid coil resistance is within spec but solenoid still fails to actuate, test the ABS module driver outputs per factory procedure or consult module replacement/bench testing guidance.
- If the solenoid or valve assembly is proven faulty, replace the right front outlet valve solenoid (or the entire hydraulic modulator assembly as required). Bleed the brake system per manufacturer procedure if hydraulic lines were opened.
- Clear codes, perform ABS system self-tests with a scan tool, and road test to verify repair. Re-scan for codes and confirm no return of C1264.
Likely causes
- Damaged wiring or poor connector at the right front outlet solenoid
- Failed solenoid coil (open or short)
- Faulty ABS control module valve driver
- Blown fuse or missing power/ground to solenoid
Fault status
Status
Right Front Outlet Valve Solenoid Malfunction — ABS/traction control performance may be reduced. Fault stored; requires inspection and repair.
Repair difficulty: Medium
Diagnostic time: 1.0 - 3.0 hours
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