EGR Throttle Control Circuit Low Voltage
The P213C code indicates that the Engine Control Module (ECM) has detected a low voltage condition in the exhaust gas recirculation (EGR) throttle control circuit. This circuit controls the EGR throttle actuator, which regulates exhaust gas flow into the intake manifold. A low voltage reading suggests a short to ground, open circuit, or faulty actuator, potentially affecting engine performance and emissions.
1. Most Common Causes
- Faulty EGR throttle actuator
- Short to ground in the control circuit
- Open circuit or damaged wiring/connectors
- Failed ECM (rare)
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced engine power or limp mode
- Rough idle or hesitation
- Increased emissions
3. Step-by-Step Diagnosis
Step 1: Use a scan tool to retrieve all codes and freeze frame data.
Step 2: Visually inspect the EGR throttle actuator and wiring for damage, corrosion, or loose connections.
Step 3: Test the actuator control circuit voltage with a multimeter; compare to manufacturer specifications.
Step 4: Check for continuity and shorts in the wiring between the ECM and actuator.
Step 5: If wiring is intact, test the actuator resistance and replace if out of spec.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as it may cause reduced engine power, poor fuel economy, and potential damage to the EGR system or catalytic converter.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for diagnosis and repair, depending on whether the actuator or wiring needs replacement.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.