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P1573

PCM EBTCM Serial Data Circuit.

  • Chrysler
  • Powertrain
  • Manufacturer code
  • Medium severity

How this code is built

P
SystemPowertrain
1
Defined byThe manufacturer
5
AreaVehicle speed, idle control and auxiliary inputs
73
FaultThe specific fault in that area

What it means

On Chrysler, P1573 is listed as a PCM EBTCM serial data circuit fault. The powertrain control module (PCM) has lost, or is receiving invalid, serial data communication with the electronic brake/traction control module (EBTCM). Exact message content and the conditions for setting the code can vary by model and year, so check the vehicle-specific service information.

Symptoms

  • Engine warning light on
  • ABS or traction control warning light on
  • Traction control or stability functions disabled
  • Poor or inconsistent communication between modules
  • Possible change in throttle or torque reduction behaviour during traction events

Possible causes

  • Damaged, chafed or corroded wiring in the serial data circuit between the PCM and brake/traction control modulelikely
  • Poor connections or corrosion at the PCM or brake/traction control module connector terminalslikely
  • Low battery voltage or poor power and earth supply to either modulepossible
  • Fault in the brake/traction control module affecting its communicationpossible
  • Fault inside the PCM communication circuit or outdated PCM softwarerare
  • Wiring damage after previous collision or repair workpossible

How to diagnose

  1. Read all stored and pending codes from every module and note any other communication or ABS codes
  2. Review freeze frame data and check whether the fault is current or intermittent
  3. Check battery condition and charging voltage, as low voltage can upset module communication
  4. Inspect the wiring and connectors between the PCM and brake/traction control module for chafing, water ingress, corrosion and pushed-out pins
  5. Check power and earth supplies to the brake/traction control module and PCM, including related fuses
  6. Wiggle-test the harness while monitoring live data from the brake module to find intermittent breaks
  7. Test the serial data circuit for continuity, short to earth and short to voltage using the wiring diagram for the specific model
  8. Check for any technical service bulletins or software updates for the vehicle before considering module replacement

How to fix

  • Repair or replace damaged wiring in the serial data circuit
  • Clean or replace corroded or loose connectors and terminals
  • Correct any battery, charging, power supply or earth faults
  • Replace the brake/traction control module if it is confirmed faulty
  • Update or replace the PCM only after wiring and the other module have been proven good, and where an outdated calibration is a known cause

Can I keep driving?

Medium severity

The car can usually be driven with care, but traction control and possibly ABS functions may be reduced, so have it checked soon. If the ABS or brake warning lights are on or the car drives abnormally, limit driving until it is inspected.

Guide written by AI from the code's definition. Confirm with a diagnosis before replacing parts.

This code for other makes

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