What does P1689 mean on a Chevy?

P1689. Traction Control Delivered Torque Output Circuit. Applies to Silverado, Sierra, Monte Carlo, Impala, Express.

What causes P1689 on a Chevy?

Open or shorted delivered torque signal wire between the PCM and the EBCM Corroded EBCM or PCM connector terminals on the delivered torque circuit Failing EBCM unable to supply the delivered torque pull-up voltage Chafed harness where the delivered torque circuit crosses the frame rail

How do I fix P1689 on a Chevy?

Check for companion ABS or TCS codes such as C0287 or C1276 first Measure delivered torque signal voltage against the 4.75 to 5.25 volt window Test the circuit for opens and shorts to ground or voltage end to end Inspect EBCM and PCM grounds since a bad ground skews the PWM signal Replace the EBCM or PCM only after the circuit proves good per the diagnostic table

Code

P1689

Traction Control Delivered Torque Output Circuit

Category: Powertrain - Computer and Auxiliary Controls
Severity: Check Engine Light
Applies to: Silverado, Sierra, Monte Carlo, Impala, Express
Related: No single generic twin. See OBD Codes List

What it means

P1689. Traction Control Delivered Torque Output Circuit. This Chevy-enhanced code applies to Silverado, Sierra, Monte Carlo, Impala, Express.

Findings, check these first

Open or shorted delivered torque signal wire between the PCM and the EBCM
Corroded EBCM or PCM connector terminals on the delivered torque circuit
Failing EBCM unable to supply the delivered torque pull-up voltage
Chafed harness where the delivered torque circuit crosses the frame rail

Standard procedure

Check for companion ABS or TCS codes such as C0287 or C1276 first
Measure delivered torque signal voltage against the 4.75 to 5.25 volt window
Test the circuit for opens and shorts to ground or voltage end to end
Inspect EBCM and PCM grounds since a bad ground skews the PWM signal
Replace the EBCM or PCM only after the circuit proves good per the diagnostic table

Look up another code

Press / to jump to the box. Chevy-enhanced powertrain, body, chassis and network codes.

Sources and review

Review: no source links are recorded for this entry.

Last updated 2026-09-19.

Report a correction for P1689. Include your vehicle, the issue and a source if you have one.

This fault is part of the GM ABS and StabiliTrak family. The GM ABS and StabiliTrak codes guide covers the check order.