P2A00 DTC Code: Meaning, Causes, & Diagnosis

P2A00 is a somewhat common DTC trouble code.  It indicates that the upstream sensor is operating outside of its normal voltage range. DTC P2A00 is most likely caused by a bad oxygen sensor, the wiring going to the O2 sensor, or an exhaust leak.  Although, there are other causes as well. P2A00 Definition: O2 Sensor … Read more

P2006: IMRC Stuck Closed (Bank 1)

P2006 is a general diagnostic code.  It is applicable to all vehicles made after the 1996 model year.  Although, it’s most common to find this code on Mercedes (far and away the most), Audi, and Ford manufactured vehicles. The most common causes of P2006 are wiring problems with IMRC Actuator, carbon deposits on the IMRC … Read more

Chevy Malibu: P1101 + P0171 Together

P1101 is a very common code to get on the Chevy Malibu (Particularly the 2012-2015 models).  It will often be paired with P0171.  They are OBD-II trouble codes.  It’s usually a bad MAF sensor or air that has gotten in where it should not have when these codes are combined.   Jump to: P1101 P0171 … Read more

P2004 Meaning, Causes, and Diagnosis

P2004 is a somewhat rare diagnostic trouble code.  It indicates that the intake manifold runner control (IMRC) is stuck open.  IMRC is a relatively new technology, which means two things: This code is typically only seen on newer vehicles. It’s only going to get more popular as IMRC technology is used on more and more … Read more

P2122 OBD-II Code: Meaning, Causes, and Diagnosis

P2122 is a generic OBD-II code, meaning that it has the same definition for all makes and models of vehicles.  But, it does seem to pop up the most in Nissan, GM, and Chrysler-made vehicles. P2122 indicates that the voltage coming from throttle position sensor “D” is below the normal operating range.  The most common … Read more

P2101 Trouble Code: Meaning, Symptoms, Causes + Diagnosis

P2101 is a general OBD2 trouble code. It has the same meaning for all vehicles. However, it seems to be most prevalently found in GM, Honda, and Nissan-made models. P2101 Definition: Throttle Actuator “A” Control Motor  – Circuit Range/Performance Throttle Actuator “A” Control Motor Circuit  (TAC for Short) Most modern cars and trucks do not use … Read more

P2106 Code: Meaning, Causes, & Diagnosis

P2106 is a somewhat uncommon OBD-II code.  It is not manufacturer-specific, so it has the same meaning for all vehicles starting with the 1996 model year.  It is an indication that limp mode/failsafe mode has been activated. Several common issues can cause P2106.  The throttle actuator itself is rarely the problem, though. P2106 Definition:  Throttle … Read more

Nissan U1000: Symptoms, Causes, and Diagnosis

U1000 is a manufacturer-specific trouble code.  It is very common to see in Nissan-made vehicles (Nissan & Infiniti). How the CAN Bus System Works Before jumping into figuring out what is causing U1000 in your vehicle, it’s important to have an understanding of the CAN bus system. Modern vehicles (particularly those made after 2008) can … Read more

U0101 Trouble Code: Meaning + Diagnosis

U0101 is a generic powertrain code, which means it has the same definition regardless of who manufactured your vehicle.  It means that the TCM (Transmission Control Module) can’t communicate with the rest of the vehicle, usually due to a bad wiring harness or the TCM itself. U0101 is often misdiagnosed as a bad TCM before … Read more

P219B: Definition, Causes, & Diagnosis

P219B is a generic OBDII code.  The code indicates that the air/fuel ratio is out of balance (too rich or too lean) on the bank 2 side of the engine in question. Your vehicle is equipped with oxygen sensors that measure the air-fuel ratio of your engine. It’s these sensors that are reporting the problem … Read more