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Home / DTC / P1653 — Please read fault memory of ABS control module

P1653 — Please read fault memory of ABS control module

Detailed page for trouble code P1653.

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P1653

PORSCHE P — Powertrain

Please read fault memory of ABS control module

Brand: PORSCHE
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • ABS control module has stored one or more fault codes
  • Communication fault between diagnostic tool and ABS module
  • Intermittent or permanent CAN/LIN bus fault
  • Low battery or poor battery connections during previous events
  • Ignition cycle or module power supply problem

Symptoms

  • ABS/ESC/TRAC warning lamp illuminated or flashing
  • ABS braking function may be disabled or degraded
  • Traction/stability control warning or reduced functionality
  • Possible diagnostic trouble codes present in ABS module
  • No drivability symptoms until a specific ABS fault is active

What to check

  • Attempt to connect a compatible diagnostic scanner to the ABS control module and read stored fault memory
  • Check vehicle battery voltage and state of charge (with ignition ON, engine off)
  • Inspect ABS module connector for corrosion, bent pins, or water ingress
  • Check continuity and voltage at module power and ground pins
  • Scan CAN/LIN bus for communication errors or other modules reporting faults

Signal parameters

  • Battery voltage at ABS module (reference 9–16 V depending on vehicle state)
  • Ground continuity and voltage drop under load
  • Wheel speed sensor signals (frequency/voltage for each wheel) while rotating wheel
  • CAN bus error counters and message presence from ABS module
  • Module internal status bytes and subcodes stored in ABS fault memory

Diagnostic algorithm

  1. Use a factory-level or compatible scan tool. Connect and attempt to read the ABS control module fault memory and note all stored codes, freeze frame, and mileage at time of fault.
  2. If the scanner cannot communicate with the ABS module, verify ignition ON and check fuses and relay supplying ABS module power.
  3. Measure battery voltage at the module connector with key ON and engine OFF; ensure good battery >=12 V nominal. Check main grounds for corrosion and tightness.
  4. Inspect ABS module connectors and wiring harness for damage, corrosion, or water intrusion. Repair any physical connector/wire faults before proceeding.
  5. If communication exists and codes are retrieved, diagnose each stored ABS/ESP code per manufacturer procedures (wheel speed sensors, hydraulic unit, valve/pressure sensor, pump motor, etc.).
  6. Check CAN bus integrity: verify termination resistances, presence of expected messages, and absence of excessive error frames. Repair wiring or module causing bus errors.
  7. Clear ABS fault memory and perform a test drive or reproduce conditions to see if the fault returns. If persistent, follow specific repair instructions for the retrieved ABS codes.
  8. If module hardware fault is confirmed after verifying wiring and power, consider ABS module repair or replacement per Porsche procedures and perform adaptation/coding as required.

Likely causes

  • Stored ABS wheel-speed sensor or hydraulic control unit errors
  • Lost communication between powertrain or instrument cluster and ABS module (CAN bus)
  • Corroded, damaged, or loose ABS module connectors or wiring
  • Faulty ABS module power or ground circuit
  • Temporary event (low battery voltage) that triggered message

Fault status

⚠️ Status
Read and clear ABS control module fault memory. Stored faults in the ABS/ESP module require further diagnosis.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

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136

Browse 136 PORSCHE manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

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