Code
C059F
Generic
C — Chassis
Brake Pressure Sensor E Circuit Low
Views:
UK: 17
EN: 21
RU: 17
AI status
Completed
Completed
100%
Causes
- Short to ground in the sensor signal wire
- Open or high-resistance connection in signal, power or ground circuits
- Failed/brake pressure sensor (internal fault)
- Corroded, loose or damaged connector
- Low or missing sensor supply voltage (fused circuit, relay, battery)
- Faulty ABS/ESC control module or internal driver
Symptoms
- ABS, ESC or brake warning lamp illuminated
- Reduced or disabled ABS/traction control function
- Brake feel may be normal but electronic brake assist functions limited
- Stored DTC(s) related to brake pressure or ABS control
- Possible limp-home behavior or degraded stability control
What to check
- Read and record all related DTCs and freeze frame data with a scan tool
- Visually inspect sensor connector and wiring for damage, corrosion or fluid
- Check battery voltage and fuses/relays for sensor power circuit
- Backprobe sensor connector and measure signal voltage with key on/engine off
- Measure continuity and resistance of signal, power and ground wires to module
- Compare live sensor data on scan tool while operating brake pedal (if safe)
Signal parameters
- Typical sensor signal resting voltage: ~0.5–4.5 V (varies by vehicle)
- Supply/reference voltage: usually 5 V or 12 V (confirm in service data)
- Expected signal change: voltage should vary with brake pressure/pedal input
- Resistance (if applicable): sensor internal resistance should match spec
- CAN/serial messages: ABS module may broadcast pressure value on vehicle bus
Diagnostic algorithm
- Retrieve freeze frame and all related codes; clear codes and attempt to re-create condition while monitoring live data.
- Visually inspect sensor E, harness, and connectors for damage, corrosion or fluid intrusion; repair pins or connectors as needed.
- With connector connected, backprobe the signal, power and ground terminals. Verify reference voltage present and signal voltage not stuck low (compare to known-good sensor spec).
- If signal is low, disconnect sensor and measure for short to ground on the signal wire (ohmmeter between signal and chassis ground).
- Check continuity between sensor power/ground and control module pins; repair any high-resistance or open circuits.
- If wiring checks good, substitute a known-good sensor or bench-test sensor per manufacturer procedure to confirm sensor failure.
- If replacement sensor still shows low signal, inspect/repair wiring to module or replace/control-module connector; consider module-driven short—test module outputs if authorized equipment available.
- After repairs, clear codes and road-test to verify no recurrence and proper ABS/brake system operation.
Likely causes
- Damaged wiring harness or pin pushed out of connector
- Connector corrosion at sensor or control module
- Sensor internal short or failed electronics
- Blown fuse or disabled sensor power circuit
- Intermittent ground connection causing low reading
Fault status
Status
Brake Pressure Sensor E Circuit Low — sensor signal below expected range. Possible short to ground, open/low supply, poor connection, or failed sensor/component.
Repair difficulty: Medium
Diagnostic time: 0.5-2 hours
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