U19xx OBD-II Codes (U1900–U1999)

U1900 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1901 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1902 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1903 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1904 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1905 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1906 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1907 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1908 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1909 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1910 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1911 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1912 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1913 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1914 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1915 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1916 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1917 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1918 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1919 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1920 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1921 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1922 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1923 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1924 critical

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1925 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1926 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1927 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1928 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1929 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1930 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1931 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1932 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1933 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1934 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1935 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1936 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1937 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1938 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1939 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1940 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1941 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1942 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1943 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1944 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1945 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1946 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1947 critical

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1948 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1949 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1950 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information