Chevy Colorado U0100:  Lost Communication with ECM/PCM “A”

U0100 is a generic diagnostic trouble code, meaning it has the same definition for any vehicle made in the 1996 model year or newer (including the Chevy Colorado).  This code tells you that communication has been lost between the ECM/PCM (main computer) and a particular control module has been completely lost. When a vehicle has … Read more

P2097 Chevy Colorado

P2097 is a generic OBD II code, which means that it has the same meaning for the Chevy Colorado as it would any other vehicle.  It specifically indicates that your Colorado detected that air-fuel mixture reading as the exhaust gas exits the catalytic converter is too rich. (too much fuel for the amount of fuel … Read more

Chevy Colorado P1153: Causes, Meaning, and Diagnosis

P1153 is not a very common diagnostic trouble code.  It can have different meanings depending on the manufacturer in question. For the Chevy Colorado, it means: P1153:HO2S Insufficient Switching (Bank 2, Sensor 1) As long as your scanner confirms that the code is for insufficient switching of the heated oxygen sensor, you’re good to go.  … Read more

Chevy Colorado P1133:  Meaning, Causes, and Diagnosis

P1133 can have different definitions depending on the vehicle manufacturer in question.  In the case of the Chevy Colorado it means: HO2S Insufficient Switching (Bank 1, Sensor 1) It is typically caused by a failure of the heated oxygen sensor.  But, there can be a few other causes as well.  They are all addressed below. … Read more

Chevy Colorado U0073: Meaning, Symptoms, + 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 Chevy Colorado as it would any other.  This code appears when something has interrupted the communication between two of your Colorado’s control modules. The most common causes of U0073 are … Read more

Chevy Colorado P2276: B2S3 O2 Sensor Stuck Lean

P2276 is a general diagnostic trouble code.  It means that your Chevy Colorado’s third (from the exhaust manifold) “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 … Read more

Chevy Colorado P2274:  B1S3 O2 Sensor – Stuck Lean

P2274 in the Chevy Colorado is a general diagnostic trouble code.  It means that the “bank 1” oxygen sensor (third oxygen sensor from the exhaust manifold, behind a catalytic converter) is continuously sending voltage that indicates a lean air/fuel mixture.   This does not necessarily mean that the vehicle is running lean (although it can, … Read more

Chevy Colorado P2018:  Meaning + Diagnosis

P2018 is a generic diagnostic trouble code (DTC) that indicates an issue with your Chevy Colorado’s intake manifold runner position sensor/valve (from here on out, we will be referring to this sensor by its common abbreviation of IMRC). P2018 Definition: IMRC – Switch Circuit Intermittent (Bank 1) IMRC The IMRC’s job is to help your Colorado’s … Read more