Code
P0932
Generic
P — Powertrain
Hydraulic Pressure Sensor Circuit
AI status
Completed
Completed
100%
Causes
- Damaged or disconnected sensor electrical connector
- Open, shorted or corroded wiring between sensor and control module
- Failed hydraulic pressure sensor (internal electronics)
- Poor sensor or chassis ground
- Low or contaminated hydraulic fluid causing abnormal pressures
- Intermittent harness damage (pinch, chafe) or water intrusion
Symptoms
- Malfunction indicator lamp or transmission/ABS warning light illuminated
- Erratic or harsh shifting (if transmission hydraulic pressure sensor)
- Reduced braking or ABS faults (if brake hydraulics involved)
- Driveability limp mode or derate in systems that rely on hydraulic pressure
- Stored code and freeze frame data showing abnormal sensor values
What to check
- Read and record freeze frame and any related codes with a scan tool
- Visual inspection of sensor, connector and wiring for damage, corrosion or looseness
- Check hydraulic fluid level and condition (transmission/brake/steering as applicable)
- Monitor live sensor data while key on and during operation using a scan tool
- Backprobe sensor connector to measure supply voltage, signal and ground
- Wiggle test the harness while observing live data for intermittent faults
Signal parameters
- Typical sensor circuits use a 5 V reference, ground and a signal output (expected signal ~0.5–4.5 V depending on pressure)
- At zero or low hydraulic pressure signal often near the lower end (~0.5 V); increasing pressure raises the signal toward ~4–4.5 V
- Supply/reference should read ~5 V at the connector with key on
- Sensor ground should be low resistance to chassis/ECM ground (
- Intermittent jumps, fixed high or fixed low voltages indicate wiring or sensor fault
Diagnostic algorithm
- Connect a scan tool and confirm P0932; record freeze frame and live data for the hydraulic pressure sensor
- Perform a thorough visual inspection of the sensor, connector, pins and wiring for corrosion, damage or loose terminals
- Verify hydraulic fluid level and condition; correct low/contaminated fluid before proceeding
- With ignition ON (engine off) backprobe the sensor connector: check reference voltage (~5 V), signal voltage, and ground continuity to ECM
- If reference or ground missing or incorrect, trace and repair wiring to the control module; repair damaged connectors or grounds
- If reference and ground are correct but signal is stuck/erratic, disconnect sensor and observe changes: an open sensor may set a different code or cause signal to go to default—compare to manufacturer data
- Perform a wiggle test of the harness while monitoring live signal to identify intermittent breaks or shorts
- If wiring checks pass, replace the hydraulic pressure sensor and clear codes
- If code returns after sensor replacement, perform continuity/resistance checks between sensor connector and module pins; if wiring is good, consider control module input fault and consult manufacturer procedures
- After repairs, clear codes and road test while monitoring live sensor data and verify no recurrence
Likely causes
- Corroded/loose connector at the sensor
- Broken or shorted signal wire between sensor and module
- Failed pressure sensor element
- Poor ground at sensor
Fault status
Status
Hydraulic pressure sensor circuit malfunction detected (open/short/out-of-range/intermittent).
Repair difficulty: Medium
Diagnostic time: 0.5-2.5 hours
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