P1526high severityPowertrain
ECM Torque Signal Internal Fault
on 1997 Volvo 960 2.9L I6 · FWD
What this code means
The ECM detected an internal fault in its torque signal output. The torque signal communicates the current engine torque to other modules such as the TCM and stability control system.
Symptoms
- Check Engine Light
- Transmission may shift incorrectly
- Stability control malfunction
- Reduced power mode
Common causes
- ECM internal circuit fault
- ECM software corruption
- ECM power supply issue
- Voltage spike damage to ECM
- Failed ECM programming
Diagnostic steps
- Check ECM power and ground connections
- Attempt ECM software update
- Test ECM torque signal output
- Check for related CAN bus faults
- Consider ECM replacement
Repair notes
Update ECM software; replace ECM if internal fault persists.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0011
Intake Camshaft Position Timing Over-Advanced Bank 1
P0012
Intake Camshaft Position Timing Over-Retarded Bank 1
P0013
Exhaust Camshaft Position Actuator Circuit/Open Bank 1
P0014
Exhaust Camshaft Position Timing Over-Advanced Bank 1
P0015
Exhaust Camshaft Position Timing Over-Retarded Bank 1