Tag: Engine Control Module

OBD-II Trouble Codes

P0034 Code: Turbocharger/Supercharger Bypass Valve “A” Control Circuit Low

On-board diagnostic (OBD) codes are designed to help identify potential issues perceived by the vehicle’s primary computer. Connecting a scan tool or code reader to the vehicle’s OBD port will...Read more

OBD-II Trouble Codes

P0040 Code: O2 Sensor Signals Swapped Bank 1 Sensor 1/Bank 2 Sensor 1

Onboard diagnostic (OBD) systems help vehicle owners identify problems perceived by their vehicle’s primary computer. In many cases, an illuminated check engine light will alert you of an error logged...Read more

OBD-II Trouble Codes

P0036 Code: P0036 HO2S Heater Control Circuit (Bank 1 Sensor 2)

Code P0036 is a generic diagnostic trouble code (DTC) that’s set when there’s a potential fault in the downstream oxygen (O2) sensor’s heater circuit. Have you recently read code P0036...Read more

OBD-II Trouble Codes

P0431 Code: Warm Up Catalytic Converter, Bank 2—Efficiency Below Threshold

Engine codes are crucial in identifying mechanical and electrical issues in cars. They come in a unique combination of letters and numbers that distinguishes whether the fault affects the body,...Read more

OBD-II Trouble Codes

P2198 Code: O2 Sensor Signal Biased/Stuck Rich (Bank 2 Sensor 1)

Your vehicle’s primary computer or powertrain control module (PCM) uses input from various sensors to calculate the optimal air-fuel ratio. One type of sensor that provides critical data to the...Read more

OBD-II Trouble Codes

P0073 Code: Ambient Air Temperature Sensor Circuit High

The ambient air temperature (AAT) sensor measures the temperature of the outside air. One or more of your car’s computers use this information for functions, such as ambient temperature display...Read more

OBD-II Trouble Codes

P0120 Code: Throttle/Pedal Position Sensor “A” Circuit

Your vehicle’s throttle position (TP) sensors and accelerator pedal position (APP) sensors are crucial to engine operation. Just like any other engine sensor, these sensors may fail due to several...Read more

OBD-II Trouble Codes

P0445 Code: Evaporative Emission System Purge Control Valve “A” Circuit Shorted

The evaporative emission control (EVAP) system prevents fuel vapors from entering the atmosphere by storing the vapors in a charcoal canister. A P0445 code gets logged if the system detects...Read more

OBD-II Trouble Codes

P0717 Code: Turbine/Input Shaft Speed Sensor “A” Circuit No Signal

OBD-II codes are standardized codes that are set by the car’s computer when it detects a fault. They make it easier to diagnose and fix issues. If your car’s computer...Read more

OBD-II Trouble Codes

P0022 Code: Intake “A” Camshaft Position – Timing Over-Retarded (Bank 2)

Inside your car’s engine, you’ll find one or more camshafts. Each camshaft has egg-shaped lobes that operate a series of valves to let air in and out of the engine....Read more

OBD-II Trouble Codes

P0308 Code: Cylinder 8 Misfire Detected

An engine needs three elements to run: compression, spark, and a precise air/fuel mixture. When an engine cylinder misfires, the root cause originates from an issue with one of these...Read more

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P0307 Code: Cylinder #7 Misfire Detected

An engine misfire is a common drivability problem that car owners may experience at one point. Once your vehicle’s primary computer detects an engine misfire, it will most likely turn...Read more

OBD-II Trouble Codes

P2610 Code: ECM/PCM Engine Off Timer Performance

An OBD-II code is designed to tell you possible issues in your vehicle. For you to resolve one, you must first know what it means. If you're having trouble figuring...Read more

OBD-II Trouble Codes

P0422: Catalyst 2 Efficiency Below Threshold (Bank 1)

There are many issues that could activate the Check Engine Light. If you get the OBD-II code P0422 after a quick scan, this could mean that there is an issue...Read more

OBD-II Trouble Codes

P0355 Code: Ignition Coil “E” Primary/Secondary Circuit

There are three things needed to start the combustion process in a gas-powered engine: an air/fuel mixture, compression, and an ignition source. The air intake system and the fuel delivery...Read more

OBD-II Trouble Codes

P0734 Code: Gear 4 Incorrect Ratio

A slipping transmission is never a good sign. Generally, any error in shifting gears warrants a trip to your mechanic. The code P0734 is one of the many OBD-II codes...Read more

OBD-II Trouble Codes

P2006 Code: Intake Manifold Runner Control Stuck Closed (Bank 1)

The intake manifold runner control (IMRC) system plays a crucial role in managing engine airflow. It helps improve engine performance and efficiency through the opening and closing of the butterfly...Read more

OBD-II Trouble Codes

P0641 Code: Sensor Reference Voltage “A” Circuit/Open

The powertrain control module or PCM is your vehicle’s primary computer. It uses multiple sensors to monitor the operation of various systems that are crucial to vehicle operation (fuel, engine,...Read more

OBD-II Trouble Codes

P0733 Code: Gear 3 Incorrect Ratio

An OBD-II code is designed to tell you any potential issues your vehicle may have. To resolve this code, you must first know what it means. If you're having trouble...Read more

OBD-II Trouble Codes

P0151 Code: O2 Sensor Circuit Low Voltage (Bank 2, Sensor 1)

Diagnostic trouble codes (DTCs) are set when there’s a problem with your car. The codes fall under four categories: powertrain, body, chassis, and network connection. Those starting with “P” are...Read more

OBD-II Trouble Codes

C0040 Code: Right Front Wheel Speed Circuit Malfunction

Modern vehicles come with an enhanced braking system called the anti-lock braking system (ABS). This system uses sensors to warn the powertrain control module (PCM) of a panic stop situation....Read more

OBD-II Trouble Codes

P0015 Code: Exhaust “B” Camshaft Position Timing – Over – Retarded (Bank 1)

Hard starting and poor idling are only some of the issues your vehicle may experience in relation to camshaft timing. If you’re experiencing these symptoms along with the check engine...Read more

OBD-II Trouble Codes

P0523 Code: Engine Oil Pressure Sensor/Switch “A” Circuit High

Your vehicle’s primary computer (Powertrain Control Module or PCM) is responsible for calculating and adjusting engine conditions to achieve optimal performance. It does so with the help of multiple sensors...Read more

OBD-II Trouble Codes

P0520 Code: Engine Oil Pressure Sensor/Switch “A” Circuit

OBD-II codes, otherwise known as diagnostic trouble codes (DTC), are codes stored in cars that have on-board diagnostics. These are standardized codes that are set by the car’s computer if...Read more

OBD-II Trouble Codes

P0339 Code: Crankshaft Position Sensor “A” Circuit Intermittent

An OBD-II code is designed to tell you potential issues found within your vehicle. For you to resolve it, you must first know what the code means. If you're having...Read more

OBD-II Trouble Codes

P0032 Code: HO2S Heater Control Circuit High (Bank 1 Sensor 1)

Oxygen sensors are devices used by the vehicle’s primary computer (Powertrain Control Module or PCM) to collect information on how much oxygen is in the engine’s exhaust gases. The input...Read more

OBD-II Trouble Codes

U0100 Code: Lost Communication with ECM/PCM “A”

Your vehicle’s communication data bus serves as the line of communication between different modules in your vehicle, including its primary computer or powertrain control module (PCM). Without this line of...Read more

OBD-II Trouble Codes

P2197 Code: O2 Sensor Signal Biased/Stuck Lean (Bank 2, Sensor 1)

A vehicle’s engine is a powerful machine. Every component, sensor, and process needs to be precise so it can perform at its peak. If even one electrical component or sensor...Read more

OBD-II Trouble Codes

P0201 Code: Cylinder 1 Injector Circuit/Open

Your vehicle’s fuel injectors are just some of the many components that are crucial for engine operation. Without them, fuel cannot reach your engine cylinders, and there would not be...Read more

OBD-II Trouble Codes

P2098 Code: Post Catalyst Fuel Trim System Too Lean (Bank 2)

The catalytic converter helps control your car’s emission levels by breaking down noxious gases into less harmful pollutants before they leave your exhaust. When the bank 2 oxygen sensor 2...Read more

OBD-II Trouble Codes

P015B Code: O2 Sensor Delayed Response – Lean to Rich (Bank 1, Sensor 1)

Your car is equipped with a lot of engine sensors that are essential to keeping your vehicle running. The OBD-II code P015B indicates the PCM has detected a delayed response...Read more

OBD-II Trouble Codes

P0053 Code: Heated O2 Sensor (H02S) Heater Resistance (Bank 1, Sensor 1)

Oxygen sensors, also known as O2 sensors, became mandatory in the mid-1900s to reduce vehicle emissions. They detect the amount of oxygen in the exhaust system and rely on built-in...Read more

OBD-II Trouble Codes

P0650 Code: Malfunction Indicator Light (MIL) Control Circuit

An illuminated Check Engine Light, also referred to as Malfunction Indicator Light (MIL) or Service Engine Light, indicates that something is wrong with your vehicle. In many cases, it would...Read more

OBD-II Trouble Codes

P0743 Code: Torque Converter Clutch Solenoid Circuit Electrical

The torque converter clutch is a mechanism that creates a connection between the transmission and the engine. It is important in increasing the efficiency of the transmission at highway speeds,...Read more

OBD-II Trouble Codes

P0456 Code: Evaporative Emission System Small Leak Detected

What Does the P0456 Code Mean? Diagnostic trouble code (DTC) P0456 stands for “Evaporative Emission System (EVAP) Small Leak Detected.” Your car’s computer may set this code if it determines...Read more

OBD-II Trouble Codes

P0103 Code: Mass or Volume Air Flow “A” Circuit High

The P0103 code indicates that your car’s computer perceives a problem with the mass air flow (MAF) sensor or its circuit. What signs do you need to look out for...Read more

OBD-II Trouble Codes

P0505 Code: Idle Control System

When your car’s primary computer, which is often referred to as the powertrain control module (PCM), perceives a problem with the idle air control system, it will warn the driver...Read more

OBD-II Trouble Codes

P0706 Code: Transmission Range Sensor “A” Circuit Range/Performance

In a car with an automatic transmission, the transmission range (TR) sensor tells the transmission control module (TCM) whether the gear selector is in Park, Reverse, Neutral, Drive, or Low...Read more

OBD-II Trouble Codes

P0732 Code: Gear 2 Incorrect Ratio

Diagnostic trouble codes (DTC) are activated when there’s a problem with your car. DTCs starting with “P” are powertrain trouble codes and are set when there are mechanical or electrical...Read more

OBD-II Trouble Codes

P0731 Code: Gear 1 Incorrect Ratio

Modern vehicles are equipped with an on-board diagnostics system that logs error codes identified by the vehicle’s primary computer. Apart from an illuminated dashboard warning light, the only way to...Read more

OBD-II Trouble Codes

P069E Code: Fuel Pump Control Module Requested MIL Illumination

Aside from your vehicle’s main computer or powertrain control module (PCM), there are other modules in your vehicle that control specific components and functions. These modules use input from various...Read more

OBD-II Trouble Codes

P2015 Code: Intake Manifold Runner Position Sensor/Switch Range/Performance (Bank 1)

Efficient engine air intake is important for the proper operation of your car’s engine. For this to happen, many engine components work together to ensure the proper delivery of air...Read more

OBD-II Trouble Codes

P0038: Heated Oxygen Sensor Heater Control Circuit High (Bank 1, Sensor 2)

Inside every heated oxygen sensor (HO2S) runs a heater wire that helps get the device up to operating temperature quickly. When the PCM detects a discrepancy between the desired and...Read more

OBD-II Trouble Codes

P0330 Code: Knock Sensor 2 Circuit (Bank 2)

The engine code P0330 may be set when your vehicle’s computer perceives a problem with the knock sensor or its circuit. This guide will give you a general idea of...Read more

OBD-II Trouble Codes

P0604 Code: Internal Control Module Random Access Memory (RAM) Error

Much like your home computer, your car’s powertrain control module (PCM) has two primary types of memory. The first is permanent, which is the read-only memory (ROM); the second one...Read more

OBD-II Trouble Codes

P0352 Code: Ignition Coil B Primary / Secondary Circuit Malfunction

Ignition coils are responsible for providing the spark plugs with the necessary high voltage to ignite the air-fuel mixture inside the combustion chambers. If the check engine light switches on...Read more

OBD-II Trouble Codes

P0451 Code: Evaporative Emission System Pressure Sensor / Switch Range / Performance

The EVAP Pressure Sensor, also known as a Fuel Tank Pressure (FTP) Sensor is a device that measures air pressure or vacuum in the evaporative emission (EVAP) system. This sensor...Read more

OBD-II Trouble Codes

P0403 Code: Exhaust Gas Recirculation “A” Control Circuit Malfunction

The exhaust gas recirculation (EGR) system helps minimize nitrogen oxide gases coming from your vehicle’s exhaust. This is important because nitrogen oxide gases are very harmful for the environment in...Read more

OBD-II Trouble Codes

P0130 Code: O2 Sensor Circuit (Bank 1, Sensor 1)

The oxygen sensor, or the O2 sensor, is an important component in a vehicle’s exhaust system. It detects the oxygen content in the exhaust gases leaving the engine. The P0130...Read more

OBD-II Trouble Codes

P0453 Code: Evaporative Emission System Pressure Sensor / Switch High

Modern enhanced evaporative emissions (EVAP) systems have a monitor that performs system self-tests. That monitor seals the system, then checks for leaks and adequate purge flow. If the fuel tank...Read more

OBD-II Trouble Codes

P2004 Code: Intake Manifold Runner Control Solenoid Bank 1 – Solenoid Stuck Open

OBD-II codes are a series of codes standardized to help mechanics, as well as knowledgeable car owners, troubleshoot problems in a car. These codes contain a combination of letters and...Read more

OBD-II Trouble Codes

U1000 Code: Manufacturer-Specific Network Communication Code

The various computer modules in charge of the many systems aboard a modern vehicle are connected by a data network. On vehicles built after 2008 (and some older models), the...Read more

OBD-II Trouble Codes

P2270 Code: O2 Sensor Signal Biased / Stuck Lean (Bank 1, Sensor 2)

Oxygen sensors send different voltage signals depending on the amount of oxygen present in the engine exhaust. These sensors emit a high voltage signal for a fuel-rich mixture with little...Read more

OBD-II Trouble Codes

P2A00 Code: O2 Sensor Circuit Range / Performance (Bank 1, Sensor 1)

Diagnostic trouble codes (DTC) or on-board diagnostic (OBD) codes are designed to standardize vehicle system diagnosis and make troubleshooting easier. A DTC can be traced by using an OBD-II scan...Read more

OBD-II Trouble Codes

P0601 Code: Internal Control Module Memory Checksum Error

Did your scanner register the P0601 code? You must address it immediately. Here’s a guide that tackles the information you need for troubleshooting, including the code’s meaning, causes, and symptoms....Read more

OBD-II Trouble Codes

P0506: Idle Air Control System RPM Lower Than Expected

Your vehicle’s idle control system is an important component of your car. This system prevents your engine from stalling when idle, especially when power-consuming accessories such as air conditioning, get...Read more

OBD-II Trouble Codes

P0123 Code: Throttle / Pedal Position Sensor “A” Circuit High

The throttle position (TP) sensor is a device that helps the engine computer determine optimal ignition spark timing and fuel injection. It does this by determining how far open the...Read more

OBD-II Trouble Codes

P2097 Code: Post Catalyst Fuel Trim System Too Rich Bank 1

To stay in top condition, an engine must maintain the ideal air/fuel ratio. Oxygen sensors help in this process by keeping the powertrain control module (PCM) updated on oxygen levels...Read more

OBD-II Trouble Codes

P0345 Code: Camshaft Position Sensor “A” Circuit (Bank 2)

Error codes that affect the drivability of the vehicle or the performance of the engine are quite serious. Ignoring these codes might lead to further engine malfunction and damage. For...Read more

OBD-II Trouble Codes

P0480 Code: Fan 1 Control Circuit

A vehicle’s engine needs to be kept within a certain temperature range at all times. To prevent overheating when there’s minimal airflow through the radiator, the engine is equipped with...Read more

OBD-II Trouble Codes

P0193 Code: Fuel Rail Pressure Sensor “A” Circuit High

One of the most critical factors that affect engine performance is fuel pressure. The fuel rail pressure sensor is a device that monitors fuel pressure inside the fuel rail. This...Read more

OBD-II Trouble Codes

P0606 Code: Control Module Processor

Generic trouble codes like the code P0606 apply to most cars that come with on-board diagnostics (OBD). When this code appears on the code reader or scanner, among the first...Read more

OBD-II Trouble Codes

P0320 Code: Ignition / Distributor Engine Speed Input Circuit

The crankshaft position (CKP) sensor keeps track of the crankshaft’s position and how fast the shaft spins. When something interrupts, disrupts, or distorts the signal from this sensor, the powertrain...Read more

OBD-II Trouble Codes

P0108 Code: Manifold Absolute Pressure/Barometric Pressure High

The smooth operation of an engine partly depends on achieving the proper air-to-fuel ratio and ignition timing. The ECM (Engine Control Module) calculates both by using information relayed by different...Read more

OBD-II Trouble Codes

P0305 Code: Cylinder 5 Misfire Detected

The OBD-II code P0305 means that the powertrain control module (PCM) has detected a misfire in one of the engine’s cylinders. It usually stems from a problem with the ignition...Read more

OBD-II Trouble Codes

P0174 Code: System Too Lean (Cylinder Bank 2)

While the P0174 OBD-II trouble code is not manufacturer-specific and is considered a generic powertrain code, it can be more common in certain car makes than others. More specifically, a...Read more

OBD-II Trouble Codes

P0171 Code: System Too Lean (Bank 1)

For combustion engines to function smoothly, it needs to have a mixture of 14.7 parts air to 1 part fuel (14.7:1). To maintain this, the engine control module (ECM) constantly...Read more

DIY

Common Questions Asked by Motorists

Q: Every once in a while I can hear a squeak or metal grinding noise coming out of the front wheels. It happens mostly at low speeds while turning. When...Read more

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