Your Chevrolet Fourninety engine control system detects a problem, the computer stores the diagnostic trouble
code P2374 in its memory.
To figure out what is wrong with your vehicle you must first extract the P2374 DTC For Chevrolet Fourninety.
On 1999 and later P2374 Chevrolet Fourninety engines, the instrument cluster has a built-in self-diagnostic mode that can be accessed by pressing and holding the instrument cluster SELECT/RESET button. Insert the ignition key and turn to the RUN position (but don't crank or start engine). Continue to press and hold the SELECT/RESET button (for 5 seconds) until the word TEST is displayed by the odometer. Release the SELECT/RESET button within three seconds after the word TEST is displayed to begin the self-diagnostic mode.
P2374 Chevrolet Fourninety DTC Meaning
Powertrain Code - Problem is related engine, transmission and emissions systems.
MFG - Manufacturer Specific
IC Module 4X Ref Circuit Intermittent, No Pulses
Exhaust Gas Recirculation System Valve 1
Cruise Vehicle Speed/Set Speed Difference Too High
OBD P2374 Chevrolet Fourninety 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 P2374, 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 P2374 DTC For Chevrolet Fourninety 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 P2374 DTC For Chevrolet Fourninety 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.