P2145: EGR Vent Control Circuit High
The P2145 code indicates that the Powertrain Control Module (PCM) has detected a high voltage condition in the Exhaust Gas Recirculation (EGR) vent control circuit. This circuit controls the vent solenoid that allows fresh air into the EGR system to prevent carbon buildup. A high voltage reading typically means there is a short to power, a faulty EGR vent solenoid, or a wiring issue. This can cause the EGR system to malfunction, leading to increased emissions and potential drivability issues.
1. Most Common Causes
- Faulty EGR vent solenoid
- Short to power in the EGR vent control circuit
- Damaged wiring or connectors
- Corroded electrical connections
- Faulty PCM (rare)
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Rough idle or stalling
- Poor engine performance
- Increased fuel consumption
- Failed emissions test
3. Step-by-Step Diagnosis
Step 1: Use an OBD2 scanner to confirm the code and check for additional codes.
Step 2: Visually inspect the EGR vent solenoid and its wiring for damage, corrosion, or loose connections.
Step 3: Test the EGR vent solenoid resistance with a multimeter (specs vary by vehicle).
Step 4: Check for voltage at the solenoid connector with the ignition on; if voltage is present when it shouldn't be, there is a short to power.
Step 5: If wiring and solenoid are okay, test the PCM output signal; replace PCM if necessary.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is generally safe to drive short distances, but the vehicle may experience rough idle or stalling. Prolonged driving can lead to increased emissions and potential damage to the EGR system. It is recommended to diagnose and repair promptly.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for diagnosis and repair, depending on the cause. Replacing the EGR vent solenoid costs around $50-$100 for parts, plus labor. Wiring repairs may be less expensive.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.