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 points to a short to power, a faulty EGR vent solenoid, or a wiring issue. This can affect EGR system operation, leading to increased emissions and potential drivability problems.
01. Most Common Causes
- Faulty EGR vent solenoid
- Short to power in the vent control circuit wiring
- Corroded or damaged connector at the EGR vent solenoid
- Failed PCM (rare)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Rough idle or hesitation
- Increased emissions
- Possible poor fuel economy
03. Step-by-Step Diagnosis
Step 1: Use a scan tool to confirm P2145 and check for other related codes.
Step 2: Visually inspect the EGR vent solenoid and its wiring for damage, corrosion, or loose connections.
Step 3: Test the vent solenoid resistance with a multimeter; compare to manufacturer specs.
Step 4: Check for voltage at the solenoid connector with key on; if voltage is present when it shouldn't be, repair short to power.
Step 5: If wiring and solenoid are okay, test the PCM output circuit; replace PCM if necessary.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is generally safe to drive short distances, but the vehicle may fail emissions tests and could experience drivability issues. It's best to diagnose and repair promptly.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for parts and labor, depending on whether the EGR vent solenoid or wiring needs replacement.