P1223 Possible Causes
- Faulty electronic throttle control actuator (TP sensor 2)
- Electronic throttle control actuator (TP sensor 2) harness is open or shorted
- Poor electrical connection in electronic throttle control actuator (TP sensor 2) circuit
How to Fix Code P1223?
Start by checking the “possible causes” listed above. Visually inspect the corresponding cable harness and connectors. Look for damaged components and check for broken, bent, pushed out, or corroded connector pins.
When is the Code Detected?
An excessively low voltage from throttle position sensor 2 (TP) is sent to the engine control module (ECM).
Possible Symptoms
- Engine light on (or service engine soon warning light)
P1223 Meaning
The electronic throttle control actuator consists of a throttle control motor, throttle position sensor, etc. The throttle position sensor (TP) responds to throttle valve movement.
The throttle position sensor has two sensors. These sensors are a type of potentiometer that convert throttle valve position into output voltage and send voltage signals to the engine control module (ECM). Additionally, these sensors detect the opening and closing speed of the throttle valve and transmit voltage signals to the ECM. The ECM determines the current throttle valve opening angle from these signals and the ECM controls the throttle control motor to properly adjust the throttle valve opening angle according to driving conditions.