Code
C2302
LAND ROVER
C — Chassis
Brake Pressure Sensor Circuit Fault (ABS Module)
Views:
UK: 6
EN: 15
RU: 7
AI status
Completed
Completed
100%
Causes
- Faulty brake pressure (hydraulic) sensor
- Damaged, corroded or loose sensor connector
- Open, shorted or high-resistance wiring between sensor and ABS module
- Poor sensor or ABS module ground or supply voltage problem
- Water ingress or contamination of sensor or connector
- Internal ABS module fault
Symptoms
- ABS warning lamp illuminated (may also trigger DSC/ESP/Traction lights)
- ABS may be disabled; reduced-stability or traction interventions inactive
- Possible change in brake pedal feel or delay in ABS operation (depending on model)
- Diagnostic trouble code(s) stored in ABS module
What to check
- Read ABS module fault memory and freeze-frame data with a capable scan tool
- Inspect sensor connector and wiring for corrosion, damage, bent pins, moisture
- Visually inspect ABS modulator/heater area for fluid leaks or contamination
- Back-probe sensor connector to verify reference voltage, ground and signal
- Perform wiggle test on harness while monitoring live data for intermittent changes
- Check continuity and resistance between sensor pin and ABS module pin with connector disconnected
Signal parameters
- Sensor supply/reference: typically 5 V (confirm with OEM data)
- Sensor signal (typical): approx. 0.5–4.5 V range (0 pressure ≈ low end, increasing pressure = higher voltage). Confirm exact ranges with manufacturer data
- Open circuit: no signal or OL on resistance check between sensor signal pin and module
- Short to ground: signal near 0 V; short to battery: signal near battery voltage (~12 V)
- Expected continuity: low ohms between sensor ground and vehicle ground; wiring back to module should show low resistance (single-digit ohms to tens of ohms depending on length)
Diagnostic algorithm
- Retrieve ABS codes and live data. Record freeze-frame and current sensor values.
- Perform visual inspection of sensor, connector and harness; repair obvious damage and retest.
- With ignition ON (engine off), back-probe connector: verify reference voltage present, ground continuity and sensor signal voltage. Note voltage at rest and while applying brake pressure (if safe to do so).
- If signal absent or incorrect, disconnect sensor and measure resistance across sensor terminals per OEM spec. If open/shorted, replace sensor.
- Check continuity between sensor connector and ABS module connector for signal, power and ground pins. Repair any open/high resistance or shorts.
- If wiring checks OK and replacement sensor does not correct the fault, inspect ABS modulator wiring at module connector and verify module supply/grounds. Consider ABS module fault if wiring and sensor are good.
- After repairs, clear codes, perform ABS self-tests and road test to confirm proper operation and that code does not return.
- Safety note: observe safe procedures when applying brake pressure and performing road tests; use two technicians if benching brake hydraulic components.
Likely causes
- Corroded/loose connector at the pressure sensor
- Wiring chafe or pinched harness causing intermittent/open
- Failed sensor due to contamination or internal damage
Fault status
Status
Brake Pressure Sensor Circuit Fault detected by ABS module — sensor signal out of range, open, short, or intermittent. May disable ABS/ESC until condition is corrected.
Repair difficulty: Medium
Diagnostic time: 1-3 hours
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