The P212A: Throttle Position Sensor/Switch ‘G’ Circuit refers to an electrical issue in the throttle position sensor ‘G’. This problem could be caused by a faulty sensor, an open or short circuit in the wiring, or issues with the sensor’s connector.
P212A – Quick Overview
Code | Information |
---|---|
Meaning | P212A: Throttle Position Sensor/Switch ‘G’ Circuit |
Is it serious? | Yes, it can affect throttle control and lead to drivability issues. |
Possible causes | – Faulty throttle position sensor ‘G’ – Open or short circuit in the sensor wiring – Issues with the sensor connector |
How to diagnose? | – Inspect the wiring and connector for the throttle position sensor ‘G’ – Test the sensor for proper operation – Check for open or short circuits in the sensor circuit |
P212A Meaning
The P212A code indicates an issue in the electrical circuit of throttle position sensor ‘G’, which plays a critical role in controlling the throttle’s position and engine response. Problems with the sensor, wiring, or connectors can cause erratic throttle control, resulting in poor acceleration and performance.
Step-by-step diagnostic guide
Action | Description | Tools Needed |
---|---|---|
Check for Other Codes | Use an OBD-II scanner to check for other related codes that could provide more insight into the issue. | OBD-II Scanner |
Inspect Throttle Sensor Wiring | Visually inspect the wiring connected to throttle position sensor ‘G’ for any signs of damage, loose connections, or corrosion. | Flashlight, Multimeter |
Test Sensor for Proper Operation | Use a multimeter to test the throttle position sensor ‘G’ for functionality and compare the results to the manufacturer’s specifications. | Multimeter |
Check for Open or Short Circuits | Perform a continuity test to check for open or short circuits in the throttle position sensor ‘G’ circuit. | Multimeter, Wiring Diagram |
Inspect and Clean Connector | Ensure the sensor connector is clean, secure, and free from corrosion or debris. Replace or clean it if necessary. | Contact Cleaner, Flashlight |
Clear the Code and Test Drive | After making repairs or adjustments, clear the code using an OBD-II scanner and take the vehicle for a test drive to ensure the issue is resolved. | OBD-II Scanner |
Recheck for Codes | After the test drive, re-scan the vehicle to ensure that the P212A code has not returned. | OBD-II Scanner |

OBD-II scanner Buyer’s Guide
- Scanner features explained
- Different types of scanners
- Scanners for coding/odometer/ECU/checks
- Best picks + discount codes

Hi, I am Juraj “Yuri” Lukacko. I got frustrated by unhelpful and scammy mechanics, so I decided to learn everything about car diagnostics myself. I test dozens of new car diagnostic tools every month along with learning new strategies to fix and customize cars. About Juraj Lukacko (Yuri)