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On-board diagnostics. Various views of a "MaxScan OE509" – a fairly typical onboard diagnostics (OBD) scanner, 2015. On-board diagnostics ( OBD) is a term referring to a vehicle's self-diagnostic and reporting capability. In the United States, this capability is a requirement to comply with federal emissions standards to detect failures that ...
A check engine light or malfunction indicator lamp ( MIL ), is a tell-tale that a computerized engine-management system used to indicate a malfunction or problem with the vehicle ranging from minor (such as a loose gas cap) to serious (worn spark plugs, engine problems or a faulty oil valve, etc.). Found on the instrument panel of most ...
OBD-II PIDs. OBD-II PIDs ( On-board diagnostics Parameter IDs) are codes used to request data from a vehicle, used as a diagnostic tool. SAE standard J1979 defines many OBD-II PIDs. All on-road vehicles and trucks sold in North America are required to support a subset of these codes, primarily for state mandated emissions inspections.
The Department of Transportation reported in 2011 that the only causes for SUA were pedal misapplication and wrong mats. Most complaints came after the Toyota recall. The cars' event data recorders showed application of accelerator pedal and no application of brake pedal. [citation needed] NASA was unable to replicate engine control failure ...
Cold start (automotive) A cold start is an attempt to start a vehicle 's engine when ambient temperatures are much lower than its normal operating temperature. [ 1] A cold start can be difficult for an engine due to higher viscosity of oil and fuel in cold temperatures. Generally speaking, diesel engines have more difficulty starting at low ...
Houston, Texas. “Houston’s hot, humid weather and wide roads all make it easier for cars to get worn down,” said Shaw. “Engine cooling system failures, air conditioning problems and tire ...
Low-speed pre-ignition ( LSPI ), also known as stochastic pre-ignition ( SPI ), [ 1] is a pre-ignition event that occurs in gasoline vehicle engines when there is a premature ignition of the main fuel charge. [ 2] LSPI is most common in certain turbocharged direct-injection vehicles operating in low-speed and high-load driving conditions. [ 3]
The first four-stroke direct-injection petrol engine for a passenger car was released the following year, in the Mercedes-Benz 300SL sports car. [38] However the engine suffered lubrication problems due to petrol diluting the engine oil, [39] [40] and subsequent Mercedes-Benz engines switched to a manifold injection design. Likewise, most ...
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