U0073 Trouble Code: Meaning & Diagnosis

U0073 Definition: Control Module Communication Bus”A” Off U0073 is a fairly common trouble code.  It is generic, so it has the same meaning for your vehicle as it would any other.  This code appears when something has interrupted the communication between two of your vehicle’s control modules. The most common causes of U0073 are wiring … Read more

P2276: O2 Sensor (Bank 2, Sensor 3) – Signal Stuck Lean

P2276 is a general diagnostic trouble code.  It means that the third “bank 2” downstream oxygen sensor (behind the catalytic converter) is continuously sending voltage that indicates a lean air/fuel mixture.   Having this code does not necessarily mean that the vehicle is running lean (although it can, but usually doesn’t).  P2276 is typically caused … Read more

P2274 Trouble Code Meaning, Causes, and Diagnosis

P2274 is a general DTC trouble code.  It means that the third oxygen sensor located on bank 1 is continuously sending a voltage signal that indicates there is a lean air/fuel mixture.   This does not necessarily mean that the vehicle is running lean (although it can).  It’s usually caused by a bad oxygen sensor, … Read more

P2018 Code: Meaning, Symptoms, Causes + Diagnosis

P2018 is a generic diagnostic trouble code (DTC) that indicates an issue with the intake manifold runner position sensor/valve (we will be referring to the sensor by its common abbreviation of IMRC). P2018 Definition: IMRC – Switch Circuit Intermittent (Bank 1) IMRC The IMRC’s job is to help the vehicle’s powertrain control module (PCM) allow air … Read more

P2198: Definition, Symptoms, Causes + Diagnosis

P2198 Definition: Oxygen Sensor – Stuck Rich (Bank 2, Sensor 1) P2198 is a generic diagnostic trouble code that indicates the B2S1 O2 sensor is stuck rich. It does not necessarily mean that the vehicle itself is running rich (although it very well could). Oxygen Sensor When you get P2198, the voltage level being recorded … Read more

P2138 DTC: Meaning, Causes, and Diagnosis

P2138 is a generic powertrain code that can affect any make or model of vehicle that has a “drive by wire” throttle system (almost every vehicle made today).  It means that your vehicle’s “D” and “E” throttle position sensors do not agree with one another on how much gas you are giving the vehicle.  They … Read more

DTC P2196: Definition, Symptoms, Causes + Diagnosis

P2196 Definition: Oxygen Sensor – Stuck Rich (Bank 1, Sensor 1) P2196 is a generic diagnostic trouble code that indicates the first oxygen sensor on bank one(B1S1) is stuck rich. It does not necessarily mean that the vehicle itself is running too rich.  This code is the opposite of code P2195, which indicates the oxygen … Read more

P2197: O2 Sensor (Bank 2 Sensor 1) – Signal Stuck Lean

P2197 is a general DTC code that indicates that the signal coming from the first O2 sensor on the bank two side of the engine is stuck giving off a lean signal.  The voltage reading from a normal oxygen sensor should look something like a heartbeat, whereas with P2197 the voltage looks like a low … Read more