P0402 code honda Often a P040x code is caused by a blockage in the EGR system and is not caused by a failed component. Aug 13, 2024 · The P0402 code stands for “Exhaust Gas Recirculation ‘A’ Flow Excessive Detected. P0402 EGR Excessive Flow Dectected Technical Description Exhaust Gas Recirculation Flow (EGR) Excessive Detected What does that mean? This diagnostic trouble code (DTC) is a generic powertrain code, which means that it applies to OBD-II equipped vehicles. The P0402 code indicates that your powertrain control module (PCM) has detected excessive exhaust gas recirculation flow in the system. 3l engine. Is your Honda throwing a P0402 engine code? Don’t worry — we’ve got you covered! This video breaks down what “Exhaust Gas Recirculation Flow Excessive Detected” means and walks you Feb 15, 2019 · P0402 is an OBDII trouble code that'll pop up in the Honda Pilot. Question for both codes if i wanted to run the engine high and let the heat go up to warm Mar 10, 2019 · P0402 is an OBDII trouble code that'll pop up in the Honda Prelude. I have a check light with Code P0420. Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Customer: How to fix codes P0402 and P0402 PD in a honda accord 2001 v6 Mechanic's Assistant: I understand that you're experiencing trouble with codes P0402 and P0402 PD in your Honda Accord 2001 V6. There are no obvious signs of excessive EGR flow - no bucking, surging, stalling, or rough idle. It is part of the vehicle emmissions system, and is used to reduce combustion temperature and pressure to control Oxides of Nitrogen. Oct 23, 2024 · The P0402 code signals a problem with your vehicle's EGR system. Here are common symptoms, causes, and how to fix code P0402 Causes of a Honda P0402 Code: Exhaust Gas Recirculation Flow Excessive Detected. Customer: dtc code p0402 below treshold bank 1 i had the cataltic converter replaced and new O2 sensor replaced with one from autozone. I recently troubleshooted the engine light, and a P0402 code came up. It’s often linked to issues with the EGR valve, the Mass Airflow (MAF) sensor, or related components. Mar 10, 2019 · P0402 is an OBDII trouble code that'll pop up in the Honda Element. I have a P0402 code on 2004 Honda Civic Hybrid with a 1. The P0404 code indicates that your powertrain control module detects that the performance of the EGR valve or sensor is not within the specified limit. "4" in the third character position in a DTC indicates that the auxiliary emission controls system is experiencing a malfunction. Some possible triggers for the code include a faulty differential pressure sensor, blocked EGR passages, and a failing EGR valve. Diagnosing and Fixing the Issue If you encounter the P0402 code, don’t panic! Nov 10, 2025 · Find out what the P0401 code means, its causes, and the best ways to fix it for smoother idling and improved fuel efficiency. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary What Does The P0402 Code Mean? EGR stands for Exhaust Gas Recirculation. Feb 15, 2019 · P0402 is an OBDII trouble code that'll pop up in the Honda Amaze. The last two characters How to troubleshoot P0402 code on TOYOTA 2ZR & 3ZR 4 Cylinder Engines Mar 10, 2019 · P0402 is an OBDII trouble code that'll pop up in the Honda Crosstour. Feb 15, 2019 · P0402 is an OBDII trouble code that'll pop up in the Honda Fit. Feb 15, 2019 · P0402 is an OBDII trouble code that'll pop up in the Honda Avancier. This diagnostic trouble code can show up for reasons related to the exhaust gas recirculation, or “EGR” system on your vehicle. Code P0402 stands for “Exhaust Gas Recirculation Flow Excessive Detected”. Dec 11, 2001 · So a while ago I started getting the P0402 EGR Wxcessive flow detected code. OBD2 Code P0402 Honda definition: EGR stands for Exhaust Gas Recirculation. Possible Problems with the EGR System Most common problem – carbon blockage where the EGR valve connects to the intake manifold Leaks in the vacuum lines EGR solenoid Feb 15, 2019 · P0402 is an OBDII trouble code that'll pop up in the Honda Ridgeline. If the engine control module (PCM) does not detect the amount of flow requested from the EGR, it will set code P0402. If you’ve encountered this code, your vehicle’s engine control module (ECM) has detected an abnormal amount of exhaust gas recirculation. Nov 1, 2024 · Keep your car running smoothly by learning how to fix the P1401 code fast and avoid potential complications before your next long drive. If you experience trouble code P0402, you may be wondering, how do I fix trouble code P0402? Learn more about your exhaust gas recirculation, or EGR, system today and effectively troubleshoot excessive flow. To better assist you, could you please provide some additional information? Customer: What is the carbon build up I need to remove and how do I Did your car computer register the P0450 error code? This article explains the meaning and outlines probable causes and symptoms. I've heard that some O2 sensors from parts store want work have to used one from honda dealer. So we went to Autozone to get it checked out, and the result is P0401: faulty EGR Valve and the imfamous P0420 Catalytic Converter code. Mar 10, 2019 · P0402 is an OBDII trouble code that'll pop up in the Honda Legend. The EGR system plays a crucial role in reducing nitrogen oxide emissions by recirculating a portion of the engine's exhaust gas back into the intake manifold, lowering combustion temperatures and reducing Feb 15, 2019 · P0402 is an OBDII trouble code that'll pop up in the Honda Accord. This is necessary to lower the nitrogen oxides (NOx) content in the exhaust gases, as the nitrogen oxides are formed at very Feb 15, 2019 · P0402 is an OBDII trouble code that'll pop up in the Honda Civic. EGR stands for Exhaust Gas Recirculation. May 30, 2025 · Learn what the P0402 code means, how it affects your engine, and how to fix it on Ford F-150, Toyota Prado, 6. P0402 code indicates that your vehicle's engine control module (ECM) has detected excessive flow in the exhaust gas recirculation (EGR) system. Make: Honda Code: P0402 Definition: Excessive EGR System Excessive Flow Detected Description: Engine started, IAT sensor more than 38ºF, engine running, system voltage at 11-16v, and the PCM detected the EGR position sensor signal indicated more than 21% over a 625 ms period during the EGR System flow test right after engine startup. It has to do with the emissions system and stands for: P0402: EGR → Excessive Flow Diagnosis The EGR system on a vehicle is responsible for recirculating exhaust gasses in order to lower the vehicles emissions output. This issue can cause various symptoms and requires proper troubleshooting to identify the root cause and perform the necessary repairs Feb 15, 2019 · P0402 is an OBDII trouble code that'll pop up in the Honda CR-V. The Exhaust Gas Recirculation (EGR) system routes a small percentage of the exhaust gases from the exhaust manifold back into the intake manifold to reduce the combustion temperature. What Does the Engine Code P0402 Mean? Character "P" in the first position of Diagnostic Trouble Code (DTC) represents the powertrain system (engine and transmission), "0" in the second position means that this is a generic OBD-II (OBD2) DTC. Mar 10, 2019 · P0402 is an OBDII trouble code that'll pop up in the Honda Stream. Feb 15, 2019 · P0402 is an OBDII trouble code that'll pop up in the Honda Odyssey. What causes OBD-II fault code P0402? EGR (Exhaust Gas Recirculation) systems are used to reduce the combustion temperature, thus reducing emissions. There are generally three parts to the EGR system: the EGR valve, an actuator solenoid, and a differential pressure sensor (DPF). May 22, 2024 · However, excessive EGR flow triggers the P0402 code, leading to an illuminated check engine light1. I eventually got a EGR bypass after Hello, I have a 2004 Honda Accord Coupe (manual). Tips and tricks for cleaning the Intake Manifold in your car and fixing code FORD P0402. I searched the forum but didn’t see anyone else that has posted about this issue. P0402 is an OBD-II code that lights up when the ECM, or Engine Control Module, senses that there is a problem with the EGR (Exhaust Gas Recirculation) valve. Cause: Linear EGR valve control circuit is shorted to Jan 22, 2024 · Welcome to our comprehensive guide on the P0402 code – Exhaust Gas Recirculation (EGR) Flow Excessive Detected. Symptoms to look out for include an illuminated check engine light, stalling, and rough idling. ” It’s logged when the PCM detects excessive EGR. It indicates the EGR valve is flowing too much recirculated exhaust gases when it is commanded to open the flow of Oct 25, 2023 · The code P0402: EGR Excessive Flow indicates an irregularity in the Exhaust Gas Recirculation (EGR) system, particularly when there’s too much EGR flow. Although generic, the specific repair steps may vary depending on make/model. Aug 25, 2020 · I have Honda Accord LX 2013 124K miles on it. Learn what Exhaust Gas Recirculation Flow Excessive Detected means, location and how to repair. Feb 15, 2019 · P0402 is an OBDII trouble code that'll pop up in the Honda Jazz. 🚨 Check Engine Light On with P0402 Code? Don’t panic! 🚨 If your scanner shows “EGR Flow Excess Detected,” I’ll walk you through what it means, why it happens, and the exact steps you The P0402 code sets when the engine computer (ECM) detects excessive EGR system flow. The check engine light comes… Tips and tricks for cleaning the EGR Valve in your car and fixing code FORD P0402. Feb 15, 2019 · P0402 is an OBDII trouble code that'll pop up in the Honda HR-V. Learn here, how to diagnose and fix it. Mar 10, 2019 · P0402 is an OBDII trouble code that'll pop up in the Honda Passport. Feb 15, 2019 · P0402 is an OBDII trouble code that'll pop up in the Honda Shuttle. P0402 | p0402 exhaust gas recirculation flow excessive detected | code p0402 Hello friends welcome to the ig garage channel today I am telling you how to fix p0402 exhaust gas recirculation flow P0402コードは、排気ガス再循環（EGR）フローが過剰であることを示し、その原因と解決策について説明します。 Feb 15, 2019 · P0402 is an OBDII trouble code that'll pop up in the Honda City. What is the most likely cause. I would clear it and it would return. The P0402 diagnostic trouble code indicates that the Engine Control Module (ECM) has detected an excessive flow of exhaust gas recirculation (EGR) in the s Learn symptoms, causes, and repair costs. Usually, it means that the valve could be malfunctioning and allowing too much exhaust gas to recirculate through the engine and intake manifold. It is part of the Apr 14, 2025 · Code P0402 - Exhaust Gas Recirculation Flow Excessive Detected. Repair Information for P0402 code. Feb 10, 2025 · If your car's ECU throws a P0402 trouble code, you want to fix the issue asap. Mar 10, 2019 · P0402 is an OBDII trouble code that'll pop up in the Honda S2000. Description: 🚗 Welcome back to our channel! In today's video, we're tackling the P0402 code, which indicates that your vehicle's exhaust gas recirculation (EGR) system is flowing too much gas Jul 15, 2016 · What Does Code P0402 Mean? A malfunctioning EGR system will cause several codes such as P0400 or P0401-P0409 to be displayed. Definition meaning and fixes for a Honda P0420: Catalyst System Efficiency Below Threshold Bank 1. 7 Powerstroke engines and more. OBD-II Code P0402 means that there is an excessive flow of exhaust gas recirculation (EGR) to the intake manifold, causing high combustion temperatures and the formation of nitrogen oxide (NOx How to fix P0402 Code: Exhaust Gas Recirculation Flow Excessive Detected What is an EGR Valve? The EGR valve reduces emissions by allowing burnt exhaust gases to go back into the engine. Oct 27, 2008 · Hey guys, My dad's 1998 Accord v6 has his check engine light on. The dealer is saying to change a catalytic converter. The P0402 code indicates that the Exhaust Gas Recirculation (EGR) flow is excessive, meaning that there is an issue with the amount of exhaust gas being recirculated back into the engine. Engine Code HONDA P0402: Exhaust Gas Recirculation (EGR) Flow Excessive Detected. When this code appears, it indicates that the EGR flow is higher than expected, which can affect engine performance and emissions. Truck is at 40,000 miles - cleared the code and drove it approx 200 miles before the code returned.