Throttle Position Sensor Circuit Intermittent
The P212E code indicates an intermittent signal from the throttle position sensor (TPS) circuit. This sensor monitors the throttle plate angle and sends voltage signals to the ECU. An intermittent fault means the signal drops out or fluctuates erratically, often due to a loose connection, damaged wiring, or a failing sensor. This can cause unpredictable throttle response, stalling, or reduced power.
1. Most Common Causes
- Loose or corroded electrical connector at TPS
- Damaged wiring or short circuit in TPS circuit
- Faulty throttle position sensor
- Intermittent ECU ground or power issue
2. Symptoms You Will Notice
- Check Engine Light on
- Intermittent hesitation or surging during acceleration
- Engine stalling at idle or low speeds
- Reduced power or limp mode activation
3. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data to capture conditions when fault occurred.
Step 2: Visually inspect TPS connector and wiring for damage, corrosion, or loose pins.
Step 3: Use a multimeter to check TPS signal voltage while slowly opening throttle; look for dropouts or erratic readings.
Step 4: Check for continuity and shorts in the TPS circuit between sensor and ECU.
Step 5: If wiring and connector are good, replace the throttle position sensor.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended as intermittent throttle response can cause sudden loss of power or stalling, leading to unsafe driving conditions.
How much does it cost to fix?▼
Typically $50-$150 for parts and labor, depending on the vehicle and shop rates.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.