Throttle Position Sensor Circuit Range/Performance
The P212B code indicates that the Engine Control Module (ECM) has detected a signal from the throttle position sensor (TPS) that is outside the expected range or not performing correctly. This sensor monitors the angle of the throttle plate and is critical for proper air-fuel mixture and engine response. The ECM compares the TPS signal with other sensors like the accelerator pedal position sensor; if the values don't match, this code sets.
01. Most Common Causes
- Faulty throttle position sensor
- Wiring or connector issues in the TPS circuit
- Carbon buildup on throttle body affecting sensor readings
- ECM software or hardware failure
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Poor acceleration or hesitation
- Engine stalling or rough idle
- Reduced fuel economy
03. Step-by-Step Diagnosis
Step 1: Use an OBD2 scanner to confirm the code and check for additional codes.
Step 2: Visually inspect the TPS connector and wiring for damage, corrosion, or loose connections.
Step 3: Test the TPS voltage signal with a multimeter while manually moving the throttle plate.
Step 4: Compare TPS readings with accelerator pedal position sensor data using a scan tool.
Step 5: Clean the throttle body if carbon buildup is present, then re-test.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as the vehicle may experience poor performance, stalling, or reduced throttle response, which can be dangerous.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for diagnosis and sensor replacement, but can be higher if wiring repairs or throttle body cleaning is needed.