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Home / DTC / C1265 — Left Rear Inlet Valve Solenoid Malfunction

C1265 — Left Rear Inlet Valve Solenoid Malfunction

Detailed page for trouble code C1265.

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C1265

HUMMER C — Chassis

Left Rear Inlet Valve Solenoid Malfunction

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

Causes

  • Open or shorted solenoid coil
  • Damaged wiring or connector (corrosion, broken wire, bent pin)
  • Faulty ABS/TC module output driver
  • Hydraulic valve stuck, seized, or mechanically blocked
  • Contaminated or low brake fluid or internal valve contamination
  • Intermittent connection or poor ground

Symptoms

  • ABS/TCS warning lamp illuminated
  • Traction control or ABS may be disabled for left‑rear corner
  • Reduced braking performance under ABS events
  • Warning messages on dash (ABS/Traction Disabled)
  • Possible unusual ABS activation or wheel lock behavior during hard braking

What to check

  • Read and record all stored codes and freeze frame data with a capable scan tool
  • Visual inspection of left rear wheel, harness, and connector for damage or corrosion
  • Check main and ABS fuses and vehicle battery/charging voltage
  • Backprobe connector and measure coil resistance at the solenoid
  • Wiggle test harness while monitoring live data to reproduce fault
  • Swap left rear solenoid with known good (if identical) to see if code follows

Signal parameters

  • Control type: Pulse-width modulated (PWM) output from ABS modulator/ECU (switches between ~0V and battery voltage)
  • Activation voltage: 0–12V (approx. vehicle battery voltage when ON)
  • Typical PWM frequency: vehicle-specific; commonly tens to a few hundred Hz (consult service manual)
  • Expected coil resistance: commonly low single‑digit to low double‑digit ohms (example 4–20 Ω) — check service spec
  • Open‑circuit: infinite resistance; short: near 0 Ω — either indicates fault
  • No activation: control line stuck at battery or ground may indicate module driver fault

Diagnostic algorithm

  1. Retrieve freeze frame and related ABS/CAN codes. Note conditions when fault occurred.
  2. Perform visual inspection of left rear solenoid connector and harness. Repair obvious damage, clean corrosion.
  3. With ignition off, disconnect solenoid connector and measure coil resistance between solenoid terminals. Compare to spec. Replace solenoid if out of range.
  4. Check for short to ground/short to battery: measure resistance from solenoid terminal to chassis ground and to battery positive; there should be no direct short.
  5. Reconnect and backprobe harness at connector. With ignition on, command ABS/TC actuations (if supported) while monitoring voltage waveform with scope or DVOM to verify PWM switching. Look for intermittent signals when wiggling harness.
  6. If control signal is present and correct but solenoid does not operate, replace solenoid/valve assembly and retest.
  7. If solenoid is open/shorted at connector, but replacement solenoid works bench tested, trace and repair wiring between module and solenoid (repair broken wires, restore grounds).
  8. If wiring and solenoid verify good, suspect ABS modulator/module driver fault. Verify module power/grounds and CAN communication; if confirmed, replace or repair ABS module per manufacturer procedure.
  9. After repairs, clear codes and perform road test with diagnostics to confirm no return of C1265 and proper ABS/TCS function.
  10. Safety note: Work on hydraulic components requires proper bleeding procedures and safe support of vehicle. Use manufacturer procedures when replacing ABS hydraulic parts.

Likely causes

  • Corroded/loose connector at left rear inlet valve
  • Open or high‑resistance solenoid coil (internal fault)
  • Short to battery or ground in solenoid circuit
  • ABS modulator module driver failure
  • Hydraulic valve sticking from contamination or debris
  • Damaged harness from road debris or pinched under body/axle

Fault status

⚠️ Status
Left Rear Inlet Valve Solenoid Malfunction: ABS control module has detected an electrical or functional fault in the left‑rear inlet valve solenoid, which may impair ABS/traction control at that wheel.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.8-2.5 hours

Similar codes

C1264 C1266 C1250 C1271 C1280
Repair manuals

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Code

C1265

HYUNDAI C — Chassis

Water Temperature Sensor- Low Input

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

Causes

  • Open or shorted solenoid coil
  • Damaged wiring or connector (corrosion, broken wire, bent pin)
  • Faulty ABS/TC module output driver
  • Hydraulic valve stuck, seized, or mechanically blocked
  • Contaminated or low brake fluid or internal valve contamination
  • Intermittent connection or poor ground

Symptoms

  • ABS/TCS warning lamp illuminated
  • Traction control or ABS may be disabled for left‑rear corner
  • Reduced braking performance under ABS events
  • Warning messages on dash (ABS/Traction Disabled)
  • Possible unusual ABS activation or wheel lock behavior during hard braking

What to check

  • Read and record all stored codes and freeze frame data with a capable scan tool
  • Visual inspection of left rear wheel, harness, and connector for damage or corrosion
  • Check main and ABS fuses and vehicle battery/charging voltage
  • Backprobe connector and measure coil resistance at the solenoid
  • Wiggle test harness while monitoring live data to reproduce fault
  • Swap left rear solenoid with known good (if identical) to see if code follows

Signal parameters

  • Control type: Pulse-width modulated (PWM) output from ABS modulator/ECU (switches between ~0V and battery voltage)
  • Activation voltage: 0–12V (approx. vehicle battery voltage when ON)
  • Typical PWM frequency: vehicle-specific; commonly tens to a few hundred Hz (consult service manual)
  • Expected coil resistance: commonly low single‑digit to low double‑digit ohms (example 4–20 Ω) — check service spec
  • Open‑circuit: infinite resistance; short: near 0 Ω — either indicates fault
  • No activation: control line stuck at battery or ground may indicate module driver fault

Diagnostic algorithm

  1. Retrieve freeze frame and related ABS/CAN codes. Note conditions when fault occurred.
  2. Perform visual inspection of left rear solenoid connector and harness. Repair obvious damage, clean corrosion.
  3. With ignition off, disconnect solenoid connector and measure coil resistance between solenoid terminals. Compare to spec. Replace solenoid if out of range.
  4. Check for short to ground/short to battery: measure resistance from solenoid terminal to chassis ground and to battery positive; there should be no direct short.
  5. Reconnect and backprobe harness at connector. With ignition on, command ABS/TC actuations (if supported) while monitoring voltage waveform with scope or DVOM to verify PWM switching. Look for intermittent signals when wiggling harness.
  6. If control signal is present and correct but solenoid does not operate, replace solenoid/valve assembly and retest.
  7. If solenoid is open/shorted at connector, but replacement solenoid works bench tested, trace and repair wiring between module and solenoid (repair broken wires, restore grounds).
  8. If wiring and solenoid verify good, suspect ABS modulator/module driver fault. Verify module power/grounds and CAN communication; if confirmed, replace or repair ABS module per manufacturer procedure.
  9. After repairs, clear codes and perform road test with diagnostics to confirm no return of C1265 and proper ABS/TCS function.
  10. Safety note: Work on hydraulic components requires proper bleeding procedures and safe support of vehicle. Use manufacturer procedures when replacing ABS hydraulic parts.

Likely causes

  • Corroded/loose connector at left rear inlet valve
  • Open or high‑resistance solenoid coil (internal fault)
  • Short to battery or ground in solenoid circuit
  • ABS modulator module driver failure
  • Hydraulic valve sticking from contamination or debris
  • Damaged harness from road debris or pinched under body/axle

Fault status

⚠️ Status
Left Rear Inlet Valve Solenoid Malfunction: ABS control module has detected an electrical or functional fault in the left‑rear inlet valve solenoid, which may impair ABS/traction control at that wheel.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.8-2.5 hours

Similar codes

C1264 C1266 C1250 C1271 C1280
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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+100 karma for a short comment :)
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Code

C1265

Other C — Chassis

Lamp Warning Relay Circuit Short To Ground

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

Causes

  • Open or shorted solenoid coil
  • Damaged wiring or connector (corrosion, broken wire, bent pin)
  • Faulty ABS/TC module output driver
  • Hydraulic valve stuck, seized, or mechanically blocked
  • Contaminated or low brake fluid or internal valve contamination
  • Intermittent connection or poor ground

Symptoms

  • ABS/TCS warning lamp illuminated
  • Traction control or ABS may be disabled for left‑rear corner
  • Reduced braking performance under ABS events
  • Warning messages on dash (ABS/Traction Disabled)
  • Possible unusual ABS activation or wheel lock behavior during hard braking

What to check

  • Read and record all stored codes and freeze frame data with a capable scan tool
  • Visual inspection of left rear wheel, harness, and connector for damage or corrosion
  • Check main and ABS fuses and vehicle battery/charging voltage
  • Backprobe connector and measure coil resistance at the solenoid
  • Wiggle test harness while monitoring live data to reproduce fault
  • Swap left rear solenoid with known good (if identical) to see if code follows

Signal parameters

  • Control type: Pulse-width modulated (PWM) output from ABS modulator/ECU (switches between ~0V and battery voltage)
  • Activation voltage: 0–12V (approx. vehicle battery voltage when ON)
  • Typical PWM frequency: vehicle-specific; commonly tens to a few hundred Hz (consult service manual)
  • Expected coil resistance: commonly low single‑digit to low double‑digit ohms (example 4–20 Ω) — check service spec
  • Open‑circuit: infinite resistance; short: near 0 Ω — either indicates fault
  • No activation: control line stuck at battery or ground may indicate module driver fault

Diagnostic algorithm

  1. Retrieve freeze frame and related ABS/CAN codes. Note conditions when fault occurred.
  2. Perform visual inspection of left rear solenoid connector and harness. Repair obvious damage, clean corrosion.
  3. With ignition off, disconnect solenoid connector and measure coil resistance between solenoid terminals. Compare to spec. Replace solenoid if out of range.
  4. Check for short to ground/short to battery: measure resistance from solenoid terminal to chassis ground and to battery positive; there should be no direct short.
  5. Reconnect and backprobe harness at connector. With ignition on, command ABS/TC actuations (if supported) while monitoring voltage waveform with scope or DVOM to verify PWM switching. Look for intermittent signals when wiggling harness.
  6. If control signal is present and correct but solenoid does not operate, replace solenoid/valve assembly and retest.
  7. If solenoid is open/shorted at connector, but replacement solenoid works bench tested, trace and repair wiring between module and solenoid (repair broken wires, restore grounds).
  8. If wiring and solenoid verify good, suspect ABS modulator/module driver fault. Verify module power/grounds and CAN communication; if confirmed, replace or repair ABS module per manufacturer procedure.
  9. After repairs, clear codes and perform road test with diagnostics to confirm no return of C1265 and proper ABS/TCS function.
  10. Safety note: Work on hydraulic components requires proper bleeding procedures and safe support of vehicle. Use manufacturer procedures when replacing ABS hydraulic parts.

Likely causes

  • Corroded/loose connector at left rear inlet valve
  • Open or high‑resistance solenoid coil (internal fault)
  • Short to battery or ground in solenoid circuit
  • ABS modulator module driver failure
  • Hydraulic valve sticking from contamination or debris
  • Damaged harness from road debris or pinched under body/axle

Fault status

⚠️ Status
Left Rear Inlet Valve Solenoid Malfunction: ABS control module has detected an electrical or functional fault in the left‑rear inlet valve solenoid, which may impair ABS/traction control at that wheel.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.8-2.5 hours

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C1264 C1266 C1250 C1271 C1280
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