P0191 Low Rationality Test
WARNING: This page is about a different car, the 2010 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.
- The engine speed is greater than 25 RPM for greater than 0.5 s.
- The engine run time is greater than 30 s.
- DTC P0191 runs the low rationality test during engine start only.