U3131 Chevrolet Trailblazer 2 OBD Code

OBD/2 U3131 error code description and symptoms.

The Throttle Position sensor signals the Engine Control Module as to the current position of the engine throttle valve.
The current throttle valve opening is based on the driver's input from the gas pedal. The ECM uses the information from this sensor to help calculate fuel delivery and spark timing.

At this point we are assuming that the fuses and relays are good. You will need to locate the PCM/TCM and the power input signal circuit using your vehicle information source. Unplug the connector from the PCM/TCM, place the ignition switch in the ON position, and probe the appropriate circuit with the positive test lead of the DVOM.

U3131 Chevrolet Trailblazer 2 Error Code Repair Process :

OBD U3131 code and tailpipe testing are two different approaches to identify vehicles in need of repair. The OBD system looks for broken or malfunctioning emissions control components and exhaust pressure control valve intermittent, while tailpipe tests sample a vehicle's exhaust to see if it is above or below certain prescribed limits. Given the robust nature of today's emissions control components, it is entirely possible for an individual component to U3131 malfunction without leading to an immediate increase in emissions at the tailpipe. In such cases, other components (like the catalyst) can temporarily compensate for the part that is broken however, these other components can only do double duty for so long before they, too, begin to malfunction. In addition, OBD also monitors for U3131 and other malfunctions in the fuel system problems that traditional tailpipe tests were not designed to identify. Most state and local areas also include a gas cap pressure test as part of an emission inspection.

Common Causes of Chevrolet Trailblazer 2 U3131 OBD2 Code

A common cause of code U3131 is the failure of Exhaust Pressure Control Valve Intermittent, but there are several other possible causes as well, such as ;

Damaged ECM
Faulty starter motor
Faulty TCM or TCM programming
Incorrect fuel filler cap used

U3131 is a kind of Network Trouble Code

U-code indicates that engine communication errors and shows lost communication with engine parts.U-Codes are fairly straight forward, given all of the articles and technical publications that have been written regarding these problematic codes. In most cases, it just comes down to identifying the module that isn't communicating with the other modules on the CAN bus line for whatever reason.

Engine OBD 2 Codes website is a freeware resource center for engine trouble codes.

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U3131 Chevrolet Trailblazer 2 OBD Code

U3131 Chevrolet Trailblazer 2 Error Code Repair Process :

Common Causes of Chevrolet Trailblazer 2 U3131 OBD2 Code

U3131 code for other Chevrolet cars