P2145 Exhaust Gas Recirculation Vent Control Circuit High
OBD-II Trouble Code Technical Description
Exhaust Gas Recirculation Vent Control Circuit High
What does that mean?
This is a generic powertrain diagnostic trouble code (DTC) and typically applies to OBD-II vehicles. Vehicle makes may include but aren't limited to Citroen, Peugeot, Sprinter, Pontiac, Mazda, Chevy, GMC, Ford, Dodge, Ram, etc.
EGR (Exhaust gas recirculation) systems are constantly being monitored and adjusted by the ECM (Engine control module) while we are driving our vehicles. The EGR systems allows your vehicle's engine to reuse air/fuel mixtures that have gone through the combustion process but has yet to burn completely and efficiently. By the EGR recycling this "semi-burnt" mixture and reintroducing it to the engine, it single handedly increases fuel economy, not to mention improved overall vehicle emissions as well.
These days, most EGR valves are controlled electronically via electrical solenoids, mechanically via vacuum controlled solenoids and various other possible ways depending on your make and model. The EGR vent solenoid is mainly used to discard unneeded recyclable exhaust. Typically they vent this un-recycled exhaust back into the exhaust system to vent into the atmosphere after passing through the catalytic converters, resonators, mufflers, etc. It is important to note that the catalytic converter will burn most of the unburnt fuel present to prevent from spiking the vehicle's emissions. The exhaust gas recirculation vent control circuit may be referring to one particular wire that is causing the fault, make sure to refer to your service manual to pinpoint what physical circuit you are working with here.
While monitoring and adjusting numerous sensors, switches, not to mention other systems, the ECM (engine control module) has activated P2145 and/or related codes (P2143 and P2144) to let you know there is a problem with your exhaust gas recirculation vent control circuit.
With P2145, it means a high voltage condition has been detected within the EGR exhaust gas recirculation vent control electrical circuit.
What is the severity of this DTC?
Severity-wise, I would say this fault is moderately severe and I will tell you why. The EGR (exhaust gas recirculation) system in not a required system for the operation of the engine. That said, it does improve emissions and also helps your engine running smoothly in varying conditions so its operation is fundamental if you want your vehicle to run and function optimally. Not to mention the fact that, if left long enough the soot that goes through these systems could accumulate and cause future problems/issues. Keep your EGR maintained properly to avoid any headaches.
What are some of the symptoms of the code?
Symptoms of a P2145 diagnostic code may include:
Decreased engine power Rough engine idle Poor acceleration Poor fuel economy CEL (check engine light) on Engine misfire-like symptomWhat are some of the common causes of the code?
Causes for this P2145 code may include:
Dirty/clogged EGR (exhaust gas recirculation valve) EGR vent solenoid defective EGR vent plugged Vacuum leak Kinked vacuum line Connector issue Wiring issue (open, corroded, chafed, short, etc.) ECM issueWhat are some P2145 diagnostic and troubleshooting steps?
The first step in the troubleshooting process for any malfunction is to research the Technical Service Bulletins (TSB) for known issues with the specific vehicle.
Advanced diagnostic steps become very vehicle specific and may require the appropriate advanced equipment and knowledge to perform accurately. We include basic steps below but refer to a vehicle year/make/model/powertrain specific repair guide for specific steps for your vehicle.
Basic Step #1
First thing you will want to do is let your v
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