Code
C0090
Generic
C — Chassis
4WD/AWD Power Transfer Unit Actuator
Views:
UK: 28
EN: 87
RU: 39
AI status
Completed
Completed
100%
Causes
- Failed or seized PTU actuator (motor or internal gear failure)
- Open/short in actuator wiring or damaged connector
- Corroded or loose electrical connector at actuator
- Blown fuse or faulty relay supplying the actuator
- Faulty transfer case control module or BCM (controller)
- Low battery voltage or poor battery/charging system
Symptoms
- 4WD/AWD warning lamp or message on dash
- Vehicle stuck in 2WD or fails to engage 4WD/AWD
- Intermittent or no response when selecting drive mode
- Abnormal noises (grinding, whining) from transfer case area
- Reduced traction or drivability complaints
- Occasional tripping of related fuses or relays
What to check
- Scan for stored codes and freeze frame data; record all related C and U codes
- Visual inspection of actuator connector and wiring for corrosion, breaks, or pin damage
- Check battery voltage (should be ~12.4–12.8 V at rest, >13.5 V running)
- Inspect fuses and relays for the actuator circuit
- Use a scan tool to command the actuator and watch for movement and live data
- Measure supply voltage and ground at the actuator connector with key on/engine running
Signal parameters
- Actuator supply voltage: ~11–14.5 V with ignition ON/engine running
- Actuator ground: near 0 V
- Control signal: may be a switched supply or PWM from 0–100% duty (0–5 V logic or variable duty on supply depending on design)
- Position sensor output (if equipped): typical 0–5 V proportional to position
- Motor coil resistance: typically low (single-digit ohms) — check service manual for exact value
- Communication bus (CAN) voltage: ~2.5 V idle on CAN high/low differential expected
Diagnostic algorithm
- Retrieve and record all DTCs and freeze frame data. Note any related chassis or network codes.
- Perform a visual inspection of actuator, connector, and harness; repair obvious damage and ensure connector is fully seated.
- Verify battery and charging system health; recharge/replace battery if low.
- Check relevant fuses and relays; replace if faulty.
- With a scan tool, command the PTU actuator while observing live data. Note if module attempts to command and whether actuator moves.
- Probe the actuator connector: verify presence of 12 V supply and good ground when commanded. Measure control signal (voltage or PWM) from the module.
- If supply and control signals are present but actuator does not move, remove actuator and bench-test with controlled 12 V supply to verify motor operation and measure resistance. Replace actuator if it fails bench test.
- If no supply or control signal, trace wiring back to module, repair open/shorts, and verify connectors and grounds. Check module outputs and related relays.
- If wiring and actuator test good, evaluate control module for faults or communication errors; check CAN bus integrity and related modules.
- After repairs, clear codes, perform actuator relearn or calibration if required, and road-test to confirm normal operation.
Likely causes
- Corroded/damaged connector or wiring to the actuator
- Actuator motor electrical failure (no movement when commanded)
- Supply voltage or ground missing at actuator
- Control module not sending correct command or communication lost
- Actuator mechanically seized or stripped gears
Fault status
Status
A malfunction was detected in the 4WD/AWD power transfer unit actuator or its control circuit. The system may be unable to engage or disengage the transfer of torque between axles until the cause is corrected.
Repair difficulty: Medium
Diagnostic time: 0.5-2.5 hours
Similar codes
Repair manuals
Brands with available manuals
3,330
The library contains 3,330 repair and diagnostic manuals. Choose a brand to open the full manual tree by year, model and trim.
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email
Code
C0090
HUMMER
C — Chassis
Right Rear ABS Solenoid #1 Circuit Malfunction
Views:
UK: 28
EN: 47
RU: 29
AI status
Completed
Completed
100%
Causes
- Failed or seized PTU actuator (motor or internal gear failure)
- Open/short in actuator wiring or damaged connector
- Corroded or loose electrical connector at actuator
- Blown fuse or faulty relay supplying the actuator
- Faulty transfer case control module or BCM (controller)
- Low battery voltage or poor battery/charging system
Symptoms
- 4WD/AWD warning lamp or message on dash
- Vehicle stuck in 2WD or fails to engage 4WD/AWD
- Intermittent or no response when selecting drive mode
- Abnormal noises (grinding, whining) from transfer case area
- Reduced traction or drivability complaints
- Occasional tripping of related fuses or relays
What to check
- Scan for stored codes and freeze frame data; record all related C and U codes
- Visual inspection of actuator connector and wiring for corrosion, breaks, or pin damage
- Check battery voltage (should be ~12.4–12.8 V at rest, >13.5 V running)
- Inspect fuses and relays for the actuator circuit
- Use a scan tool to command the actuator and watch for movement and live data
- Measure supply voltage and ground at the actuator connector with key on/engine running
Signal parameters
- Actuator supply voltage: ~11–14.5 V with ignition ON/engine running
- Actuator ground: near 0 V
- Control signal: may be a switched supply or PWM from 0–100% duty (0–5 V logic or variable duty on supply depending on design)
- Position sensor output (if equipped): typical 0–5 V proportional to position
- Motor coil resistance: typically low (single-digit ohms) — check service manual for exact value
- Communication bus (CAN) voltage: ~2.5 V idle on CAN high/low differential expected
Diagnostic algorithm
- Retrieve and record all DTCs and freeze frame data. Note any related chassis or network codes.
- Perform a visual inspection of actuator, connector, and harness; repair obvious damage and ensure connector is fully seated.
- Verify battery and charging system health; recharge/replace battery if low.
- Check relevant fuses and relays; replace if faulty.
- With a scan tool, command the PTU actuator while observing live data. Note if module attempts to command and whether actuator moves.
- Probe the actuator connector: verify presence of 12 V supply and good ground when commanded. Measure control signal (voltage or PWM) from the module.
- If supply and control signals are present but actuator does not move, remove actuator and bench-test with controlled 12 V supply to verify motor operation and measure resistance. Replace actuator if it fails bench test.
- If no supply or control signal, trace wiring back to module, repair open/shorts, and verify connectors and grounds. Check module outputs and related relays.
- If wiring and actuator test good, evaluate control module for faults or communication errors; check CAN bus integrity and related modules.
- After repairs, clear codes, perform actuator relearn or calibration if required, and road-test to confirm normal operation.
Likely causes
- Corroded/damaged connector or wiring to the actuator
- Actuator motor electrical failure (no movement when commanded)
- Supply voltage or ground missing at actuator
- Control module not sending correct command or communication lost
- Actuator mechanically seized or stripped gears
Fault status
Status
A malfunction was detected in the 4WD/AWD power transfer unit actuator or its control circuit. The system may be unable to engage or disengage the transfer of torque between axles until the cause is corrected.
Repair difficulty: Medium
Diagnostic time: 0.5-2.5 hours
Similar codes
Repair manuals
Manual library for HUMMER
69
Browse 69 HUMMER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.
HUMMER
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email
Code
C0090
HYUNDAI
C — Chassis
Right Rear ABS Solenoid or Motor #1 Circuit Malfunction(Outlet Valve)
Views:
UK: 22
EN: 46
RU: 30
AI status
Completed
Completed
100%
Causes
- Failed or seized PTU actuator (motor or internal gear failure)
- Open/short in actuator wiring or damaged connector
- Corroded or loose electrical connector at actuator
- Blown fuse or faulty relay supplying the actuator
- Faulty transfer case control module or BCM (controller)
- Low battery voltage or poor battery/charging system
Symptoms
- 4WD/AWD warning lamp or message on dash
- Vehicle stuck in 2WD or fails to engage 4WD/AWD
- Intermittent or no response when selecting drive mode
- Abnormal noises (grinding, whining) from transfer case area
- Reduced traction or drivability complaints
- Occasional tripping of related fuses or relays
What to check
- Scan for stored codes and freeze frame data; record all related C and U codes
- Visual inspection of actuator connector and wiring for corrosion, breaks, or pin damage
- Check battery voltage (should be ~12.4–12.8 V at rest, >13.5 V running)
- Inspect fuses and relays for the actuator circuit
- Use a scan tool to command the actuator and watch for movement and live data
- Measure supply voltage and ground at the actuator connector with key on/engine running
Signal parameters
- Actuator supply voltage: ~11–14.5 V with ignition ON/engine running
- Actuator ground: near 0 V
- Control signal: may be a switched supply or PWM from 0–100% duty (0–5 V logic or variable duty on supply depending on design)
- Position sensor output (if equipped): typical 0–5 V proportional to position
- Motor coil resistance: typically low (single-digit ohms) — check service manual for exact value
- Communication bus (CAN) voltage: ~2.5 V idle on CAN high/low differential expected
Diagnostic algorithm
- Retrieve and record all DTCs and freeze frame data. Note any related chassis or network codes.
- Perform a visual inspection of actuator, connector, and harness; repair obvious damage and ensure connector is fully seated.
- Verify battery and charging system health; recharge/replace battery if low.
- Check relevant fuses and relays; replace if faulty.
- With a scan tool, command the PTU actuator while observing live data. Note if module attempts to command and whether actuator moves.
- Probe the actuator connector: verify presence of 12 V supply and good ground when commanded. Measure control signal (voltage or PWM) from the module.
- If supply and control signals are present but actuator does not move, remove actuator and bench-test with controlled 12 V supply to verify motor operation and measure resistance. Replace actuator if it fails bench test.
- If no supply or control signal, trace wiring back to module, repair open/shorts, and verify connectors and grounds. Check module outputs and related relays.
- If wiring and actuator test good, evaluate control module for faults or communication errors; check CAN bus integrity and related modules.
- After repairs, clear codes, perform actuator relearn or calibration if required, and road-test to confirm normal operation.
Likely causes
- Corroded/damaged connector or wiring to the actuator
- Actuator motor electrical failure (no movement when commanded)
- Supply voltage or ground missing at actuator
- Control module not sending correct command or communication lost
- Actuator mechanically seized or stripped gears
Fault status
Status
A malfunction was detected in the 4WD/AWD power transfer unit actuator or its control circuit. The system may be unable to engage or disengage the transfer of torque between axles until the cause is corrected.
Repair difficulty: Medium
Diagnostic time: 0.5-2.5 hours
Similar codes
Repair manuals
Manual library for HYUNDAI
370
Browse 370 HYUNDAI manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.
HYUNDAI
-
HYUNDAI: 2023
-
Elantra
-
Elantra N
-
Kona N
-
Tucson
- Hybrid Blue
- Hybrid Limited
- Hybrid SEL Convenience
- Limited, Eng CD G4EN, 4WD
- Limited, Eng CD G4EN, FWD
- Limited, Eng CD G4KN, 4WD
- Limited, Eng CD G4KN, FWD
- N Line, Eng CD G4EN, 4WD
- N Line, Eng CD G4EN, FWD
- N Line, Eng CD G4KN, 4WD
- N Line, Eng CD G4KN, FWD
- Plug-In Hybrid Limited
- Plug-In Hybrid SEL
- SE, Eng CD G4EN, 4WD
- SE, Eng CD G4EN, FWD
- SE, Eng CD G4KN, 4WD
- SE, Eng CD G4KN, FWD
- SEL, Eng CD G4EN, 4WD
- SEL, Eng CD G4EN, FWD
- SEL, Eng CD G4KN, 4WD
- SEL, Eng CD G4KN, FWD
- XRT, Eng CD G4EN, 4WD
- XRT, Eng CD G4EN, FWD
- XRT, Eng CD G4KN, 4WD
- XRT, Eng CD G4KN, FWD
-
-
HYUNDAI: 2022
-
Elantra N
-
Kona N
-
Veloster N
-
HYUNDAI: 2021
-
Veloster N
-
HYUNDAI: 2020
-
Palisade
-
Veloster N
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email
Code
C0090
OPEL
C — Chassis
Rear Right Inlet Solenoid Valve Circuit Malfunction
Views:
UK: 24
EN: 47
RU: 28
AI status
Completed
Completed
100%
Causes
- Failed or seized PTU actuator (motor or internal gear failure)
- Open/short in actuator wiring or damaged connector
- Corroded or loose electrical connector at actuator
- Blown fuse or faulty relay supplying the actuator
- Faulty transfer case control module or BCM (controller)
- Low battery voltage or poor battery/charging system
Symptoms
- 4WD/AWD warning lamp or message on dash
- Vehicle stuck in 2WD or fails to engage 4WD/AWD
- Intermittent or no response when selecting drive mode
- Abnormal noises (grinding, whining) from transfer case area
- Reduced traction or drivability complaints
- Occasional tripping of related fuses or relays
What to check
- Scan for stored codes and freeze frame data; record all related C and U codes
- Visual inspection of actuator connector and wiring for corrosion, breaks, or pin damage
- Check battery voltage (should be ~12.4–12.8 V at rest, >13.5 V running)
- Inspect fuses and relays for the actuator circuit
- Use a scan tool to command the actuator and watch for movement and live data
- Measure supply voltage and ground at the actuator connector with key on/engine running
Signal parameters
- Actuator supply voltage: ~11–14.5 V with ignition ON/engine running
- Actuator ground: near 0 V
- Control signal: may be a switched supply or PWM from 0–100% duty (0–5 V logic or variable duty on supply depending on design)
- Position sensor output (if equipped): typical 0–5 V proportional to position
- Motor coil resistance: typically low (single-digit ohms) — check service manual for exact value
- Communication bus (CAN) voltage: ~2.5 V idle on CAN high/low differential expected
Diagnostic algorithm
- Retrieve and record all DTCs and freeze frame data. Note any related chassis or network codes.
- Perform a visual inspection of actuator, connector, and harness; repair obvious damage and ensure connector is fully seated.
- Verify battery and charging system health; recharge/replace battery if low.
- Check relevant fuses and relays; replace if faulty.
- With a scan tool, command the PTU actuator while observing live data. Note if module attempts to command and whether actuator moves.
- Probe the actuator connector: verify presence of 12 V supply and good ground when commanded. Measure control signal (voltage or PWM) from the module.
- If supply and control signals are present but actuator does not move, remove actuator and bench-test with controlled 12 V supply to verify motor operation and measure resistance. Replace actuator if it fails bench test.
- If no supply or control signal, trace wiring back to module, repair open/shorts, and verify connectors and grounds. Check module outputs and related relays.
- If wiring and actuator test good, evaluate control module for faults or communication errors; check CAN bus integrity and related modules.
- After repairs, clear codes, perform actuator relearn or calibration if required, and road-test to confirm normal operation.
Likely causes
- Corroded/damaged connector or wiring to the actuator
- Actuator motor electrical failure (no movement when commanded)
- Supply voltage or ground missing at actuator
- Control module not sending correct command or communication lost
- Actuator mechanically seized or stripped gears
Fault status
Status
A malfunction was detected in the 4WD/AWD power transfer unit actuator or its control circuit. The system may be unable to engage or disengage the transfer of torque between axles until the cause is corrected.
Repair difficulty: Medium
Diagnostic time: 0.5-2.5 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email