Engine fault codes If the issue is something more serious, a mechanic may also recommend fixing the underlying trouble codes. Some of the codes down below have links, which means that we have a more in-depth article written about them to repair your car easily. Stored codes indicate an issue that requires immediate attention and will always cause the Check Engine light to illuminate. Powertrain codes relate to the engine and associated mechanical systems. Get definitions and auto repair information for thousands of OBD-II codes. The J1587, J1708 & the J1939 system MID 128 Engine While reading and interpreting OBD 2 codes is possible as a DIYer for most conditions, there are instances when professional assistance is necessary: Complex issues. Fault Codes Related To Transmission. While the P0173 engine trouble code isn’t the most common issue, it is definitely important to have it checked by a professional. Hello, i cannot seem to find the 4efe engine on corolla 1992 on the specific manufacturer trouble codes do you have information for any 4efe engine 1. That's because the car will be able to tell you what’s wrong through the OBD-II system. Limited diagnostic abilities. Fault code P0456 is another common code that has been reported. DTC codes are typically one letter followed by four numbers. Apr 14, 2025 · You can use an OBD-II scanner to communicate with your vehicle’s onboard computer and retrieve diagnostic trouble codes (DTCs). Jan 19, 2020 · The Diagnostic Trouble Code system is a huge help to the home mechanic. It indicates that the engine coolant is not getting warm enough and it’s not achieving its proper operating temperature. D engine oil temperature greater than 80°C (176°F) to properly adapt. Reading and Clearing OBD-II Codes This code indicates that the engine is running too lean. When your Check Engine light comes on, there is a problem with your vehicle. There is a P0335 engine fault codes list available to help you find and diagnose this problem. Some Vehicle Specific Codes. Full list of OBD II Diagnostic Trouble Codes for your Vehicle. Before you start any repairs, it's important to understand the meaning of the OBD II code you're dealing with. They have a standard format as shown below : The first letter indicates OBD-I codes were the original diagnostic codes issued and focused strictly on the emissions controls of the vehicle. Note: Certain codes may not be listed in the database. The codes provide below are generic codes that may not apply to all vehicles. Jan 19, 2022 · P0191 Code Explained — Everything You Need to Know P0010 Code – Symptoms, Causes, and Common Fixes P0172 Code – Fuel System Too Rich (Bank 1) P0137 Code Explained – Causes, Fixes and More P0016 Engine Fault Code Explained – Causes, Symptoms, Fixes P0430 Fault Code – Catalyst System Efficiency Below Threshold (Bank 2) P0193 Code CAT Fault Codes | Caterpillar Engine Errors And Trouble Codes Cat Diagnostic codes are used by the electronic system in order to alert the operator that a problem exists. Depending on your scanner and year of the vehicle you may be presented with a few systems such as Engine/Powertrain, Transmission, Airbag, Brakes etc. One of the first steps in fixing this problem is checking the MAF sensor for any issues. 1. For the other OBD-II codes, choose from Bxxxx - B Codes - OBD-II Body Codes or Cxxxx - C Codes - Chassis Codes. Mercedes ‘P’ (Powertrain) fault codes list Nov 21, 2022 · The P0128 check engine fault code is associated with a problem with the engine’s coolant system. P codes can be further broken down by where the numeric total after the P lies in the OBD-II code list: P0100-P0199: Deal with fuel and air metering and monitor the vehicle’s fuel mileage and DTC (diagnostic trouble codes), also referred to as engine fault codes, are used to identify and diagnose malfunctions in a vehicle or piece of heavy equipment. Stored codes can be read by all OBD-II scanners, which can also be used to clear the codes. These codes act as a language that vehicles use to communicate potential issues, making them a vital tool for car owners, mechanics, and automotive DIYers alike. OBDII Troubleshooter – Instantly Find Code Meanings & Repair Advice Enter an OBDII code or describe your car issue to get expert, AI-powered repair insights. A diagnostic code also indicates the nature of the problem for you, and you can see what is the code meaning with Catfaultcode. Enter a BMW fault code (P or hex), complete the captcha, and click "Search" P-Codes will start with a P and are usually generated by generic scanners. BMW Fault Code Lookup. Learn what diagnostic trouble codes (DTCs) mean and how to fix them. Jun 20, 2021 · Search OBD2 Trouble Codes Database. The last two numbers provide a description of the fault code. Example: P1055 Hex Codes are typically given by more advanced scanners. OBD-I codes were also around much longer than OBD-II codes, which came into use Sep 18, 2022 · If one or both repairs are necessary, they are outlined in the repair estimate. Apr 21, 2025 · When someone says “MIL on” or “CEL on”, the specific fault code has triggered the check engine light or the corresponding malfunction warning in the instrument cluster. These check engine codes commonly relate to engine, transmission, or exhaust system problems. In this blog, we’ll explore some of the most common trouble engine codes, what they mean, and how to resolve them, ensuring you stay ahead of any potential problems. DELPHI EFI SYSTEM TROUBLE CODES. com 24 690 01 Rev. Check engine codes are divided into three categories: powertrain, chassis, and body. The OBD-II DTC codes here generally apply to all OBD-II GM vehicles from 1996 and newer: GMC, Chevrolet, Buick, Cadillac, and former brands Oldsmobile, Pontiac, and Saturn. This is a message generated by a vehicle's on-board diagnostic (OBD) system when it detects an issue within a particular system or subsystem of a vehicle. If you want to learn more about a specific OBD2 code, check out the CarParts. P1234). Feb 9, 2025 · 1. Tip: You will want to address the top DTCs first if there are multiple codes. Standard or generic fault codes are a list of codes common to all manufacturers. Browse generic and manufacturer specific codes by category or search by code number. Among them, "P0300" stands out as one of the most frequent, indicating a cylinder misfire. Feb 20, 2025 · What Are Diagnostic Trouble Codes (DTCs)? DTCs act as an automotive diagnostic language, helping technicians interpret vehicle malfunctions. Type your code into the search box and click on the article link to retrieve information. " Jan 29, 2013 · What is a Diagnostic Trouble Code (DTC)? Diagnostic trouble codes (or fault codes) are obd2 codes that are stored by the on-board computer diagnostic system. Then refer to the appropriate troubleshooting procedure for more information. Browse through 30 models of Hyundai available on site now. “6” in the third character position in a DTC indicates that the computer and auxiliary outputs is experiencing a malfunction. What are the letters in obd2 trouble code? When your car’s check engine light turns on, it’s essential to understand what the OBD2 trouble codes are telling you. Always refer to engine service manual for the latest information related to engine diagnostics and troubleshooting. OBD-II Codes Explained; How do I reset the "Check Engine" Light? What are fuel trims? Full list of Frequently Asked OBD Questions; Recent OBD-II Forum Discussions. Use Caterpillar Electronic Technician (ET) to determine the diagnostic codes that are active or logged. P0171 – System Too Lean (Bank 1) Find out the most popular Hyundai fault codes along with what they mean. 3l 16valve fuel injection 75 – 88 – 100 horsepower versions P1447 Diagnostic Module Tank Leakage (DM-TL) Pump Too High During Switching (BMW); EVAP Control System Purge Flow Monitoring (Nissan, Infiniti) P1448 Diagnostic Module Tank Leakage (DM-TL) Pump Too Low During Switching (BMW); EVAP Canister Vent Control Valve (Open) (Nissan, Infiniti) P1449 Diagnostic Module Tank Leakage (DM-TL) Pump Too High (BMW) P0XXX Codes; Trouble Code Fault Location Probable Cause; P0000 – P0099 (Fuel and air metering and auxiliary emission control) P0000: No fault-P0001 : Fuel volume regulator control -circuit open: Wiring, regulator control solenoid: P0002: Fuel volume regulator control -circuit range/performance: Wiring, regulator control solenoid: P0003 Apr 16, 2025 · Select “Codes” or “Trouble Codes” to open the main Codes menu. If your Check engine light is on you may have a serious problem. Scan your codes and follow the chart to determine what the code means. Sep 24, 2024 · These codes provide insight into what’s happening under the hood, helping you address issues before they escalate. Oct 24, 2022 · Here's how to read OBD codes so that when that Check Engine light pops on, you can use an OBD scanner to find out what’s wrong with your vehicle Also known as a DTC engine code, engine fault code, or check engine light codes, these codes are usually five characters long. Some shops will scan your codes for free. Generic Powertrain Diagnostic Trouble Codes (DTC) Listings Nov 14, 2024 · DTC is short for Diagnostic Trouble Code. Trouble Codes › Check Engine Light Trouble Codes for Old and New cars and Trucks. These codes are displayed on the scanning tool when it’s connected to the OBD system. While the exact format and meaning of the codes can vary slightly depending on the vehicle manufacturer and OBD version, the general structure is consistent. Learn what different common Check Engine light codes may mean, and what to do to fix them. These Diagnostic Trouble Code (DTCs) --Trouble codes are how OBDII identifies and communicates to technicians where and what on-board problems exist. This list of faults, also called DTC (for Data Trouble Code) has been defined so that any diagnostic device can read and decode them. Examples: 180101 or 1B9308 or 30FF Mar 31, 2023 · You will find the complete list of Freightliner PID, MID, and SID fault codes to make your repair life simpler. These codes help pinpoint malfunctions related to the engine, transmission, emissions systems, chassis, or other components. When the MIL/CEL is on, Diagnostic Trouble Codes (DTCs) will be stored in the vehicle’s computer, which can be read with an OBD scanner to help diagnose the issue. Find the best OBD2 scanner, read the code list, and get expert tips for your vehicle's diagnostics. Find a complete list of over 5,000 generic and manufacturer-specific codes for powertrain, chassis, body, and network communication. Case IH Engine fault codes t1 (3601-6) – Foot throttle position sensor, grounded or current above normal range Effects: Engine enabled – maximum engine speed restricted to 1760 rpm (no foot throttle). 2019. It is considered generic because it applies to all makes and models of vehicles (1996-newer), although specific repair steps may vary depending on the model. Description: Code P0171 indicates that the engine management system detects a leaner than expected air/fuel ratio on bank 1. These OBD2 codes are stored when a sensor in the car reports a reading that is outside the normal/accepted range May 15, 2023 · Character “P” in the first position of Diagnostic Trouble Code (DTC) represents the powertrain system (engine and transmission), “2” in the second position means that this is a ISO/SAE controlled OBD-II (OBD2) DTC. Description of the standard trouble OBD codes by family. Jan 29, 2013 · Learn what OBD2 codes are, how they identify car problems, and how to reset them. The five-digit DTC includes one letter usually followed by four numbers (e. Mar 9, 2024 · Armed with this knowledge, reading and interpreting OBD2 engine fault codes becomes a manageable task, helping you keep your vehicle in optimal condition. In this, ‘P’ indicates a powertrain code indicating a problem with the engine; the ‘0’ indicates that it’s a generic code for your car. Our user-friendly OBD2 codes list is your ultimate resource for decoding and understanding Audi fault codes. Enter an OBDII code or describe your car issue to get expert, AI-powered repair insights. If you encounter multiple or recurring codes, it’s best to consult a professional mechanic who can perform a thorough diagnosis. The most prevalent OBD2 codes typically fall within the "P" range, which pertains to the powertrain. May 25, 2023 · Below, you will find a full OBD2 code list with all the P-codes, which means that all these codes appear when there is trouble with the engine or drivetrain. B145501 fault code B145501 Steering Wheel Heater Temperature Sensor - Electrical Failure Passive/Sporadic That's the diagnostic reading on my Crafter 4 motion. Jun 25, 2022 · If you are experiencing any of the symptoms associated with the P0335 engine fault code, contact a professional mechanic or repair shop. Mar 29, 2025 · Car Fault Codes: Breakdown of Engine Codes Complete List. g. Examples: "What does a bad ECM mean?", "P0420 code meaning", or "Infiniti G37 window not opening. Evaporative Emission Control System Purge Control Valve Circuit Open This diagnostic trouble code (DTC) is a generic OBD-II powertrain code. com trouble code database. When the system identifies an issue, it turns on the check engine light and provides real-time data in addition to a standardized series of OBD-II Codes. For example, the code P0301 indicates a misfire in cylinder 1, while the code P0420 indicates a problem with the catalytic converter. " OBD 2 codes, also known as Diagnostic Trouble Codes (DTCs), are alphanumeric combinations that provide valuable insights into a vehicle’s condition. To read the description for your specific trouble code, check an online source such as OBD-Code’s website. Jun 7, 2016 · Step 5: Determine the exact fault. Look up B, C, U and P codes to diagnose your car problem. This list contains standard diagnostic trouble codes (DTC's) that are used by some manufacturers to identify vehicle problems. This alerts the driver to perform a diagnostic check to identify the issue. The letters and numbers in engine codes provide specific information about the type and location of the problem detected by the vehicle’s onboard diagnostic (OBD) system. Table 3 lists the diagnostic codes that apply to the TCM for the engine cooling system. This provides valuable information for diagnosis and repair, helping you identify issues with the fuel system, engine power, or emissions systems that may trigger the Check Engine light. Trouble Codes › OBD II Trouble Codes. This code is logged when a small leak in the EVAP system is detected. Troubleshooting 18 KohlerEngines. Aug 1, 2023 · These codes are generated when a pending code doesn’t resolve itself over time or passes a certain threshold. Some parts stores will scan your codes for free. There may be slight changes depending on the year/model of vehicle, you would need to consult a factory service manual for specifics. Oct 6, 2023 · Tables 1 and table 2 lists the diagnostic codes that apply to the engine ECM. What are OBD2 Codes？ On-Board-Diagnostic (OBD) Trouble Codes are one way your vehicle reports self-diagnostic results. Vacuum leaks are another notorious cause of this code. Find out what OBD-II codes mean and how to diagnose vehicle problems with them. B – Body. Diagnostic trouble codes were originally developed by the Society of Automotive Engineers (SAE) to help fleet vehicles comply with emission regulations under When the check engine light illuminates, it often means that one or more OBD2 trouble codes have been generated. Full list of OBD II Diagnostic Trouble Codes. These are stored in response to a problem found in the car by the system. Autozone is one place that will give you the code number. When the system identifies an issue, it turns on the check engine light and provides real-time data in addition to a standardized series of Diagnostic Trouble Codes (or DTCs). If this indicator light solidly stays on after the ignition is turned on, it’s a sign that a fault code is present. Technicians rely on these codes to diagnose and resolve problems. On-Board-Diagnostic (OBD) Trouble Codes are one way your vehicle reports self-diagnostic results. General Motors OBD-II Trouble Codes. Your mechanic can help you find a solution by reading the code. Mar 29, 2023 · Fault Code: J1939 SPN: J1939 FMI: Lamp: J1939 SPN Description: Cummins Description: 111: 629: 12: Red: Controller #1: Engine Control Module Critical Internal Failure - Bad intelligent device or component: 115: 612: 2: Red: System Diagnostic Code #2: Engine Magnetic Speed/Position Lost Both of TwoSignals - Data erratic, intermittent or incorrect Feb 20, 2024 · Mercedes fault codes starting with ‘MR’ (Engine Control for the Mercedes-Benz Actros truck) Mercedes fault codes starting with ‘GS’ (Gear Shift for the Mercedes-Benz Actros truck) Tip: You can easily find a specific fault code by pressing Command+F on Mac or CTRL+F on Windows. OBD 2 scanners may All About Harley-Davidson Fault (DTC) Codes What is the Check Engine Light for on a Harley-Davidson? A solid check engine light on your Harley-Davidson’s dashboard indicates that the diagnostic system has detected a malfunction. It’s divided into four sections: Powertrain, Network, Body, and Chassis, making it easy to find the specific codes related to the engine, network, body control, and chassis issues. com service. . In some cases, the codes lower down on the list may be Feb 13, 2024 · Fault Codes Related To Engine. Diagnostic Fault Codes For Cummins Engines Applies to Engine Models QSB T2, QSC T2, QSL T2, QSM11, QSX15, QSK19, QSK23, QST30, QSK45/60/78 Note: These fault codes are current at date of publication. The fault codes will appear when there is any detection of a misfire, increased internal temperature, low engine coolant or fuel pressure, or defect in the regulation of exhaust gas. Ford Codes; Trouble Code Fault Location Probable Cause; P00BD: Mass Or Volume Air Flow A Circuit Range/Performance - Air Flow Too High: P0113: Intake Air Temperature Sensor Circuit High Input: MAF sensor, Wiring: P0171: Fuel trim (FT) system too lean, bank 1: Intake/exhaust leak, AIR system, MAFNAF sensor, fuel pressure/pump, injector(s), HO2S The most common OBD-II codes are P0xxx powertrain codes, which are listed below on this page, along with P2xxx generic & P3xxx generic codes (please scroll down). Chevrolet Codes; Trouble Code Fault Location Probable Cause; B1325: Control Module Power Circuit Low/High Voltage: P0014: Camshaft position (CMP) exhaust/right/rear, bank 1 -timing over -advanced/system performance: P0171: System too lean, bank 1: Intake/exhaust leak, AIR system, MAFNAF sensor, fuel pressure/pump, injector(s), HO2S: P0174 Diagnostic Trouble Codes, also known as engine fault codes, are five-digit codes that identify a particular problem in the car. If the car's computer ever encounters a problem, a fault code or Diagnostic Trouble Code (DTC), will be stored within the car’s ECU memory. When a vehicle’s on-board diagnostics (OBD) system detects a problem, it activates the corresponding trouble code. The first number in the DTC indicates whether the code is an SAE generic code (applies to all OBDII systems) or is specific to the vehicle manufacturer. The fault codes related to the transmission include altered gear ratio, slipping, and increased Apr 3, 2023 · The P, Powertrain, B, and C codes identify problems with the engine, transmission, or brakes, and C – Chassis. The DTC is usually in five digits, such as P0030. Code P0171 – Lean air/fuel mixture (Bank 1). Sep 4, 2023 · Most Common OBD-II Engine Trouble Codes to Look out For. rpfgz feaugm wjzurm mjdcgnq irhy mmdle lyr flqbi juqzng yjsyri