Throttle Position Sensor Circuit Intermittent
The P212E code indicates an intermittent fault in the throttle position sensor (TPS) circuit. This sensor monitors the throttle plate angle and sends a voltage signal to the engine control module (ECM). An intermittent signal can cause erratic engine behavior, such as surging, hesitation, or stalling. The issue may stem from a loose connection, damaged wiring, or a failing sensor.
01. Most Common Causes
- Loose or corroded electrical connector at the throttle position sensor
- Damaged wiring or short circuit in the sensor circuit
- Faulty throttle position sensor
- Intermittent ECM issue
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Engine hesitation or surging during acceleration
- Poor idle or stalling
- Reduced fuel economy
03. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data to capture conditions when the fault occurred.
Step 2: Visually inspect the TPS connector and wiring for damage, corrosion, or loose pins.
Step 3: Use a multimeter to check sensor reference voltage (typically 5V) and ground continuity.
Step 4: Monitor TPS signal voltage with a scan tool while slowly opening the throttle; look for dropouts or erratic readings.
Step 5: If wiring and voltage are okay, replace the throttle position sensor.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended. The intermittent signal can cause sudden loss of throttle response or stalling, posing a safety risk.
How much does it cost to fix?▼
Typically $50-$150 for parts and labor, depending on the vehicle and whether the sensor or wiring needs replacement.