C053E

Code

Generic C — Chassis

Brake Pressure Sensor A Circuit Low

Brand: Generic

Type: C — Chassis

Views: UK: 24 EN: 38 RU: 21

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Page language: EN

Causes

Short to ground in the sensor signal wire
Open or damaged wiring with low/leaky connection
Corroded, loose or contaminated connector terminals
Failed Brake Pressure Sensor A (internal short or output fault)
Poor ground or supply voltage to the sensor
Faulty ABS/Brake control module (rare)

Symptoms

ABS and/or traction control warning lamp illuminated
ABS operation disabled or limited
Brake system warning lamp may illuminate
Stored fault code(s) for brake pressure sensor
Possible reduced diagnostic live data for brake pressure (low or 0 reading)

What to check

Read and record freeze frame and live data with a suitable scan tool
Verify battery voltage and charging system (low voltage can affect sensors)
Visual inspection of sensor connector, wiring harness, and module connector for damage or corrosion
Check for other related DTCs (communication, power, ground) before component replacement
Backprobe sensor connector to measure supply, ground and signal voltages while operating brake
Measure continuity and resistance of signal and ground circuits to the ABS module

Signal parameters

Sensor usually uses a reference supply (commonly ~5 V) and ground — check manufacturer spec
Expected signal range typically ~0.5–4.5 V across pressure range (manufacturer-specific)
Circuit low condition usually indicated by signal
Open circuit or no supply may show signal >4.8–5.0 V or no response (varies by design)
Continuity: sensor ground to chassis ground should be near 0 Ω (few ohms); signal wire should not be shorted to ground

Diagnostic algorithm

Connect a capable scan tool, confirm C053E is present and review live data and freeze frame.
Verify vehicle battery voltage is within normal range (12.4–14.7 V) and clear codes; attempt to recreate fault.
Perform a visual inspection of the sensor, connector, wiring harness, and ABS module connector for damage, corrosion, or moisture.
Backprobe the sensor connector: check reference supply voltage (should match spec, commonly ~5 V), ground continuity, and signal voltage while applying brake pressure or exercising system. Note any signal stuck low.
If signal is low, disconnect sensor and measure signal wire resistance to chassis ground. A near-zero reading indicates a short to ground in wiring.
Check continuity between sensor connector and ABS module pins. Repair any open/shorted wires or corroded terminals.
If wiring and connectors are good and supply/ground are correct but signal still low with a known good pressure application, replace the Brake Pressure Sensor A.
If replacing the sensor does not correct the issue, test or inspect the ABS control module input. Consider module diagnosis/repair by a specialist.
After repairs, clear codes and road-test while monitoring live data to confirm proper sensor operation and absence of reoccurrence.

Likely causes

Wiring shorted to ground between sensor and control module
Corroded/loose connector at sensor or module
Faulty pressure sensor
Intermittent ground or low vehicle battery voltage
Module input circuit fault

Fault status

⚠️ Status

Brake Pressure Sensor A circuit voltage below expected threshold (circuit low). ABS/traction functions may be limited; repair wiring, connector, sensor, or module as required.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0-3.0 hours