C0091 Engine Trouble Code
Meaning of C0091 engine trouble code is a kind of chassis trouble code and when the check engine light comes C0091 code on the first you should check is the gas cap. Pull over, retighten it, and take a look at the cap to see if it has any cracks in it. Continue driving and see if the check engine light turns off. Alternately, you can purchase a gas cap for about $3 at an auto parts store. All you need to do is take the old one off and screw on the new one. If you've already made it to the store, you might as well just replace it. While not car-threatening, it's good to take care of this right away to improve gas mileage.
C0091 Fault Symptoms :
If one of these reasons for C0091 code is occuring now you should check C0091 repair processes.
Now don't ask yourself; What should you do with C0091 code ?
The solution is here :
C0091 Possible Solution:
Power Steering Pressure (PSP) Switch Malfunction In Key On, Engine Off Self-Test, this DTC indicates the PSP input to the PCM is high. In Key On, Engine Running Self-Test, this DTC indicates that the PSP input did not change state. Steering wheel must be turned during Key On, Engine Running Self-Test PSP switch/shorting bar damaged SIG RTN circuit open PSP circuit open or shorted to SIGRTN PCM damaged.
C0091 Code Meaning :
|OBD-II Diagnostic Chassis (C) Trouble Code For Engine||Intake Valve Control Solenoid Circuit Low||Ambient Air Temperature Sensor Circuit Low||Crankshaft Position Sensor A Circuit Malfunction||Crankshaft Position Sensor A Circuit Low Input|
The oxygen (02) sensors on your car measure the oxygen in the exhaust to determine how rich or lean the ratio of fuel and air are in the cylinders. Optimizing this mixture means better fuel economy and fewer exhaust emissions.
C0091 OBD-II Diagnostic Chassis (C) Trouble Code DescriptionC0091 engine trouble code is about Crankshaft Position Sensor A Circuit Low Input.
Main reason For C0091 CodeThe reason of C0091 OBD-II Engine Trouble Code is Ambient Air Temperature Sensor Circuit Low.
C0091 code on vehicles with electronically controlled automatic transmissions, the 3-4 shift solenoid is responsible for actuating the hydraulic circuits to activate clutches or bands that change gears inside the automatic transmission.