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1999 Honda Accord 3.0L V6 Check Engine Code P2145 - EGR Vent Circuit High Diagnosis

Model: 1999 Accord 3.0 V6 Fault Code: P2145 Posted: 2010-01-05 14:30

Hello everyone, I'm helping my son with his 1999 Honda Accord 3.0L V6 that recently developed a check engine light after an EGR valve replacement. The new fault code is P2145 — indicating a 'EGR Vent Circuit High' condition. Despite the EGR being replaced, this code has reappeared. I've reviewed various sources and found limited information on this specific code for the 1999 Accord. Since the error indicates a high voltage or open circuit in the EGR vent system, I'm wondering if it could be due to: - A disconnected or poorly connected vent line - An open circuit in the EGR vent solenoid (especially if equipped with an electric EGR) - Clogged intake ports causing restricted airflow - A faulty ECM or sensor reading My son is currently at college, so I'm looking for clear guidance on where to inspect and what components to check. Specifically: Does the 1999 Honda Accord 3.0L V6 have an electric EGR vent solenoid (without vacuum lines)? If yes, where is it located? Any insights or troubleshooting steps would be greatly appreciated — especially for this model year and engine configuration.

Related fault codes
P2145
Comments (3)
Anonymous 2010-01-05 16:21

On most Honda vehicles, EGR-related issues are typically not caused by a faulty EGR valve itself but rather by clogged intake ports or blocked passages. Since the code P214-5 indicates a 'high' reading in the vent circuit, it's likely pointing to an open circuit — such as a disconnected wire, loose connection, or a failed solenoid. I recommend having your son visually inspect the EGR vent lines and ensure all connections are secure. For clarity, sharing photos of the actual vent system with him would help confirm proper setup.

Anonymous 2010-01-05 16:48

Thanks for the reply! You're absolutely right — many Honda EGR problems stem from intake port blockages rather than a failing valve. However, what's confusing is that code P2145 doesn't reference 'flow' directly; it refers to a high vent circuit reading. This suggests an open circuit or failure in the vent path. I'm now considering having my son remove the EGR assembly and inspect for blockages or debris. But I'd like to confirm: Does the 1999 Honda Accord 3.0L V6 have an electric EGR solenoid (with no vacuum lines)? If so, where is it located? Any resources or diagrams pointing to this component would be very helpful. Thanks again for the insight!

Anonymous 2010-01-06 06:07

I'm not certain about the exact configuration of the EGR system in the 1999 Accord, as I don't work on enough Honda models to have firsthand experience. Alldata or similar technical databases would likely provide more accurate details. That said, if this is a linear solenoid-style EGR (as opposed to a vacuum-operated one), it's possible that clogged intake ports could cause the PCM to attempt higher flow levels than achievable — leading the valve to remain in a high-flow position for extended periods. This might result in a 'high' reading on the vent circuit. It’s just a theory, and I’m far from being an expert on Honda systems — but it's worth considering as part of the troubleshooting process.