What Does P1712 Mean?
The secondary engine torque control signal circuit has a malfunction. This communication signal allows the transmission control module to request torque reduction from the engine during shifts, and the circuit is not functioning properly.
Common Causes
35%
Communication error between engine control module and transmission control module
25%
Failed engine control module not responding to torque reduction requests
20%
Failed transmission control module unable to send proper signals
15%
Damaged or corroded data bus connectors or wiring
5%
Software calibration issue requiring module reprogramming
Diagnostic Steps
1
Step 1: Verify communication between engine and transmission control modules using scan tool
2
Step 2: Check for additional communication codes or network-related fault codes
3
Step 3: Inspect control module connectors for corrosion, bent pins, or poor connections
4
Step 4: Test control module power and ground circuits for proper voltage and continuity
5
Step 5: Monitor torque reduction request and response signals during test drive shifts
Estimated Repair Cost
$150 - $1,200
Parts + labor, varies by vehicle and location
The secondary engine torque control signal circuit has a malfunction. This communication signal allows the transmission control module to request torque reduction from the engine during shifts, and the circuit is not functioning properly.
The most common cause of P1712 (Engine torque control signal 2 circuit malfunction) is: Communication error between engine control module and transmission control module
Typical repair costs for P1712 range from $150 to $1,200, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Transmission may shift harshly due to lack of engine torque reduction during shifts. Could cause increased transmission wear and uncomfortable driving experience.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1712 to identify the root cause.
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Quick Info
Category
Powertrain
System
Powertrain Communication / Transmission Control
Difficulty
Type
Manufacturer
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