What Is the P1400 Code?
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The P1400 code indicates a problem within the exhaust gas recirculation (EGR) system. Depending on the manufacturer, it may be listed as “DPFE Circuit Low Input,” “Differential pressure feedback sensor – low voltage detected,” or “Exhaust gas recirculation (EGR) valve – voltage incorrect.” “DPFE,” which is in the name of this code, stands for “Delta/Differential Pressure Feedback EGR,” which indicates that it’s part of the EGR system that is showing a fault. This code differs from the P1401 code because this code indicates a low input, whereas P1401 indicates a high input.
More About the P1400 Code
Although this code is defined as a problem within the Delta/Differential Pressure Feedback EGR, this is only the case for Citroen, Ford, Lincoln, Mazda, Mercury, and Peugeot manufacturers. Audi, Chrysler, Dodge, Eagle, Hyundai, Jaguar, Kenworth, Land Rover, Mercedes-Benz, Mitsubishi, Nissan, Peterbilt, and Volkswagen vehicles also indicate an issue with the EGR system, although these issues may be different. Here are a few other unrelated manufacturers’ codes.
- Camshaft Position Actuator ‘A’ Control Circuit Signal Low Bank 1 – BMW
- Cold start emission control -malfunction – Buick, Cadillac, GMC, GM, Hummer, Isuzu, Pontiac, Saab, Saturn
- Heated Catalyst Battery Voltage or Current too Low During Heating Bank 1 – Mini
- Fuel tank vent valve – circuit malfunction voltage low – Subaru
- Throttle position (TP) sensor 2 – circuit malfunction – Toyota
- Outside air temperature sensor – signal low – Volvo
This indicates the importance of paying close attention to the description of the code and not just the code itself. Different manufacturers may show different definitions for the same code.
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What Are the Symptoms of a P1400 Code?
For most of these codes, including the P1400 code, the check engine light is the first thing you’ll likely notice. There are very few other symptoms that you should expect; it’s common for this to be the only symptom, with no drivability issues at all. However, this code may come with other codes that can create drivability problems.
What Are Some Causes of a P1400 Code?
The most common causes of the P1400 code are issues with the differential pressure feedback electronic sensor. This may be because the sensor itself is faulty, because the harness is open or shorted, or because the circuit has a poor electrical connection. It may also be that your vehicle’s battery has a low overall power; in this case, you should expect many other codes indicating low power to other areas as well.
How Serious Is the P1400 Code?
The extent of this problem will impact how serious the code itself is. Oftentimes, because there aren’t many drivability problems associated with it, the problem isn’t very serious. However, as with any code, the longer you drive with it, the more problems you’ll start experiencing. Assume that this problem could build up to be very serious and solve it as early as possible.
Can I Still Drive with a P1400 Code?
The P1400 code should allow you to drive it to the local repair shop with no worries. Because this problem typically isn’t very serious and doesn’t present significant driving concerns, you’ll usually be able to drive yourself to the repair shop. However, because the EGR system reduces nitric oxide, it may have a negative impact on the environment and will likely be unable to pass an emissions check, so it’s important to fix it as soon as possible.
How Easy Is It to Diagnose a P1400 Code?
Because this code has fewer potential causes than some vehicle diagnostic codes, it can be easier to diagnose a P1400 code than some other codes. However, the steps themselves may also be more complicated. If you’re looking to diagnose the P1400 code, then it may be a good idea to talk to an expert first, as doing it yourself isn’t always an option.
How Difficult Is It to Inspect a P1400 Code?
The inspection process for a P1400 code requires you to be familiar with the extremely complex EGR system within your engine. While very experienced hobbyists might know their way around the EGR system, the average individual probably won’t. In these cases, it’s best to talk to an expert.
Need Additional Help with Your P1400 Code?
The P1400 code is a manufacturer’s code, and it’s very complex to fix the code no matter what the definition is. If you’re not comfortable with handling this code on your own, then you’re not alone. There are plenty of experts who can help you fix this code, no matter what the underlying problem is.
The first step is to find a repair shop in your area with Kelley’s help. Using the repair shop locator, it’s possible to find a nearby repair shop that will help you understand and fix the P1400 code.
It’s also important to remember that it’s uncommon to see just a single diagnostic code. If you’re looking to get more information about your diagnostic codes or just want to learn more about the diagnostic code process, then check out the KBB OBD-II database.
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