The P212C: Throttle Position Sensor/Switch ‘G’ Circuit Low indicates that the throttle position sensor ‘G’ is sending a lower-than-expected voltage or signal. This issue can be caused by a faulty sensor, wiring problems, or other electrical faults in the sensor’s circuit.
P212C – Quick Overview
Code | Information |
---|---|
Meaning | P212C: Throttle Position Sensor/Switch ‘G’ Circuit Low |
Is it serious? | Yes, it can cause throttle response issues and affect drivability. |
Possible causes | – Low voltage or signal from throttle position sensor ‘G’ – Faulty sensor – Wiring issues |
How to diagnose? | – Measure voltage or signal from the sensor – Test the sensor for faults – Inspect wiring and connections |
P212C Meaning
The P212C code indicates that the throttle position sensor ‘G’ is detecting a low signal or voltage, which can lead to poor throttle control and engine performance. The problem could stem from a malfunctioning sensor, issues with wiring, or poor connections that are preventing proper communication between the sensor and the engine control module (ECM).
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 give more context to the issue. | OBD-II Scanner |
Inspect Throttle Sensor Wiring | Visually inspect the wiring and connectors connected to throttle position sensor ‘G’ for any signs of damage, loose connections, or corrosion. | Flashlight, Multimeter |
Measure Voltage or Signal | Use a multimeter to measure the voltage or signal from the throttle position sensor ‘G’ and compare it with manufacturer specifications. | Multimeter |
Test Sensor for Faults | Use a diagnostic tool to test the throttle position sensor ‘G’ to check for internal faults or inconsistencies. | Diagnostic Tool, Multimeter |
Inspect Wiring for Damage | Check for any open circuits, shorts, or other wiring damage that could lead to low signals from the sensor. Repair or replace as needed. | Multimeter, Wiring Diagram |
Clear the Code and Test Drive | After repairs or adjustments, clear the code with an OBD-II scanner and take the vehicle for a test drive to verify the issue is resolved. | OBD-II Scanner |
Recheck for Codes | After the test drive, re-scan the vehicle to make sure the P212C code has not returned. | OBD-II Scanner |

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