Short to ground or chafed wiring on the ASR active signal circuit between the traction control module and the engine control module; Corroded, loose or damaged connector terminals at the engine control module or the brake/traction control module; Fault in the ABS/traction control module holding the ASR signal low; A fault in the brake system inputs, such as a wheel speed sensor, that is keeping traction control constantly active; Water ingress or damage to the harness near the wheel arches or the brake modulator; Internal fault in the engine control module input circuit.

P1572

ASR Active Circuit Low Too Long.

Buick
Powertrain
Manufacturer code
Medium severity

How this code is built

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

What it means

On Buick, P1572 means the engine control module has seen the ASR (acceleration slip regulation, or traction control) active circuit held low for longer than expected. This is the signal line between the traction control system and the engine control module, used to request torque reduction. The module sets the code when that line stays pulled low, which suggests a wiring fault, a stuck signal or a fault in the traction control module.

Symptoms

Traction control or ABS warning light on the dashboard
Check engine light on
Traction control not working or acting when it should not
Reduced engine power or hesitation under acceleration
Other stored traction or ABS codes

Possible causes

Short to ground or chafed wiring on the ASR active signal circuit between the traction control module and the engine control modulelikely
Corroded, loose or damaged connector terminals at the engine control module or the brake/traction control modulelikely
Fault in the ABS/traction control module holding the ASR signal lowpossible
A fault in the brake system inputs, such as a wheel speed sensor, that is keeping traction control constantly activepossible
Water ingress or damage to the harness near the wheel arches or the brake modulatorpossible
Internal fault in the engine control module input circuitrare

How to diagnose

Read all stored codes and freeze frame data, noting any ABS, wheel speed or traction control codes alongside P1572
Check the traction control and ABS warning lights and see whether the traction control switch, if fitted, works and is not stuck
Inspect the harness and connectors between the brake/traction control module and the engine control module for chafing, corrosion, water and pin damage
Check the wheel speed sensors and their wiring for faults that could keep traction control active
With the correct wiring diagram for the model and year, test the ASR signal circuit for a short to ground and for continuity and resistance
Monitor the ASR active signal on a scan tool while driving or using the traction control, to see if it stays low
Check the supply, ground and communication of the brake/traction control module, then consider module faults only after wiring is proven good

How to fix

Repair or replace the damaged wiring or short to ground on the ASR signal circuit
Clean, repair or replace corroded or damaged connectors and terminals
Repair any wheel speed sensor or brake system faults that are causing the traction control to stay active
Replace or repair the ABS/traction control module if testing proves it is holding the signal low
Replace or repair the engine control module only if the input circuit is proven faulty, following the manufacturer procedure for the model

Can I keep driving?

Medium severity

The car can usually be driven carefully in the short term, but traction control and possibly ABS may not work, and power may be limited. Get it checked soon, and take extra care on wet or slippery roads.

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