Code
C0092
Generic
C — Chassis
4WD/AWD Power Transfer Unit Position Sensor B
Views:
UK: 13
EN: 26
RU: 17
AI status
Completed
Completed
100%
Causes
- Failed PTU position sensor (sensor B)
- Open, shorted, or damaged wiring between sensor B and the control module
- Corroded, loose, or contaminated connector at the sensor or module
- Poor sensor ground or lost reference voltage
- Water intrusion or contamination of the PTU assembly
- Mechanical binding or seizing of the PTU/actuator preventing normal movement
Symptoms
- 4WD/AWD light or malfunction indicator illuminated
- Loss of 4WD/AWD engagement or ability to shift modes
- Traction/ABS warning or reduced traction control functionality
- Potential limp or reduced drive mode related to drivetrain control
- Unusual drivetrain noise or binding from PTU area
- Stored fault code(s) related to PTU position sensors
What to check
- Scan for stored codes and freeze frame data; note related chassis or drivetrain codes.
- Perform a visual inspection of PTU area: look for fluid leaks, corrosion, damaged wiring, or loose connectors.
- Inspect and reseat the connector for sensor B; check for bent pins, corrosion, or water entry.
- Backprobe the sensor connector and measure reference voltage, signal voltage, and ground integrity with key ON (engine off where appropriate).
- Wiggle the harness and connector while monitoring signal for intermittent changes.
- Check continuity from sensor pins to the control module and for short to battery or ground.
Signal parameters
- Reference (excitation) voltage: typically ~5.0 V (may vary by manufacturer)
- Signal output (analog potentiometer type): typically ~0.1–4.9 V depending on PTU position
- Signal should change smoothly with PTU movement; jumps or stuck values indicate fault
- Typical sensor resistance (potentiometer style): commonly in the kilo-ohm range (manufacturer-specific)
- High/low/infinite resistance, full short to Vb, or signal stuck at rail are abnormal
Diagnostic algorithm
- Read and record C0092 and any related codes. Clear codes and see if C0092 returns. Note conditions when code set (temperature, vehicle speed, mode).
- Visually inspect sensor B, PTU housing and wiring harness for damage, contamination, or fluid intrusion. Repair obvious damage.
- With connector intact, backprobe terminals: verify reference voltage (≈5V), sensor signal voltage, and ground continuity to chassis/ECU. Use proper backprobing technique and safety.
- Operate PTU/transfer case (use service menu or actuate vehicle 4WD controls per procedure) while monitoring signal. Signal should vary smoothly; if intermittent or stuck, suspect sensor or harness.
- Wiggle test harness and connector while monitoring signal and checking for intermittent faults. Repair broken wires, pins, or connectors as required.
- If open or shorted circuits are found, repair wiring or connector and retest continuity to the module. Protect and seal connector against moisture after repair.
- If wiring and connector are good but the signal is incorrect or does not change with PTU movement, remove and bench-test the sensor if feasible (measure resistance or output while rotating the sensor). Replace sensor if out of specification.
- If replacement sensor does not correct the issue, check PTU mechanical movement and actuator; repair any mechanical binding that prevents proper sensor operation.
- If wiring, sensor and PTU operation are verified good, consider module input/output test or replacement only after module-level diagnostics.
- After repair, clear codes, perform function tests/road test to verify PTU function and that code does not return.
Likely causes
- Connector corrosion or damaged harness at PTU sensor
- Worn/failed PTU position sensor B
- Open or short in the signal or ground circuit
- PTU mechanical problem preventing sensor movement
Fault status
Status
PTU Position Sensor B — Circuit fault or out-of-range signal
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
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