What Does P1698 Mean?
The engine torque control cut signal circuit is reading lower voltage than expected. This signal coordinates torque reduction during transmission shifts or traction control events. Low input suggests a wiring issue or failed component in the torque reduction communication circuit.
Common Causes
35%
Damaged or shorted wiring in torque control signal circuit
30%
Failed transmission control module or TCM output driver
20%
Poor ground connection in control circuit
15%
Corroded connector between PCM and TCM
Diagnostic Steps
1
Step 1: Locate torque control signal wire between PCM and TCM using wiring diagram
2
Step 2: Measure voltage on signal circuit with key on (should be 5V or 12V depending on system)
3
Step 3: Check for short to ground using resistance measurement with power off
4
Step 4: Inspect connectors at both PCM and TCM for corrosion, pushed-out pins, or damage
5
Step 5: Monitor signal voltage during operation or shift events with scan tool PID data
Estimated Repair Cost
$150 - $800
Parts + labor, varies by vehicle and location
The engine torque control cut signal circuit is reading lower voltage than expected. This signal coordinates torque reduction during transmission shifts or traction control events. Low input suggests a wiring issue or failed component in the torque reduction communication circuit.
The most common cause of P1698 (Engine torque control cut signal circuit low input) is: Damaged or shorted wiring in torque control signal circuit
Typical repair costs for P1698 range from $150 to $800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
May cause harsh shifts, poor shift quality, or transmission protection mode activation. Vehicle is generally safe to drive but transmission durability may be affected by uncontrolled torque during shifts.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1698 to identify the root cause.
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Quick Info
Category
Powertrain
System
Powertrain Communication / Transmission
Difficulty
Type
Manufacturer
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