DTC 27 - TRAC Sub-Throttle Valve: DTC Detecting Condition

Input voltage at VTA2 circuit on ECM is approximately 2.5 volts below reference voltage. Possible causes are:

• Sub-throttle actuator.
• Sub-throttle position sensor.
• Sub-throttle position sensor open or short circuit.
• Engine Control Module (ECM).
• TRAC ECU.