P1191 Engine Trouble Code
When you check engine light came on code P1191 the reason should be Engine Light ON (or Service Engine Soon Warning Light). However your vehicle's manufacturer may have a different definition for the P1191 OBD-II Diagnostic Powertrain (P) Trouble Code. So you should chech it on our car models.
When your car's 'P1191 Check Engine' light comes on, it's usually accompanied by a sinking feeling in the pit of your stomach. The light could mean a costly problem, like a bad catalytic converter, or it could be something minor, like a loose gas cap. But in many cases, it means at minimum that you'll be visiting the car dealer to locate the malfunction and get the light turned off.
P1191 Code Meaning :
|OBD-II Diagnostic Powertrain (P) Trouble Code For Engine||Fuel And Air Metering||Engine Oil Temperature Sensor Malfunction||Cylinder 4 Contribution/Balance Fault||Glow Plug/Heater Circuit 'A' Malfunction|
The poor running symptoms are consistent with a MAP sensor malfunction. In addition, in some cases, a bad MAP sensor will not throw a code. Again, the ELD code likely represents a separate wiring issue.
P1191 OBD-II Diagnostic Powertrain (P) Trouble Code DescriptionP1191 OBD-II Trouble Code Key Line Voltage is one of the definitions for the P1191; however your vehicles manufacturer may have a different definition for the P1191 code. Please check below for your specific make. P1191 code.
Reason For P1191 CodeThe reason of P1191 OBD-II Engine Trouble Code is Engine Oil Temperature Sensor Malfunction.
P1191 DTCs may also be triggered by faults earlier down the line. For example, a dirty MAF sensor might be causing the car to overcompensate in its fuel-trim adjustments. As a result, oxygen sensors are likely to report fuel mixture problems.