P0991 DTC For Fiat Stilo

Fiat Stilo Engine Specifications:
Engine Type :Single Cylinder Engine
Cylinder Type :Opposite Piston Engine
Engine Air Intake Process :Naturally Aspirated

Your Fiat Stilo engine control system detects a problem, the computer stores the diagnostic trouble code P0991 in its memory. To figure out what is wrong with your vehicle you must first extract the P0991 DTC For Fiat Stilo.

On 1999 and later P0991 Fiat Stilo engines, the instrument cluster has a built-in self-diagnostic mode that can be accessed by pressing and holding the instrument cluster SELECT/RESET button. Insert the ignition key and turn to the RUN position (but don't crank or start engine). Continue to press and hold the SELECT/RESET button (for 5 seconds) until the word TEST is displayed by the odometer. Release the SELECT/RESET button within three seconds after the word TEST is displayed to begin the self-diagnostic mode.

P0991 Fiat Stilo DTC Meaning

P Powertrain Code - Problem is related engine, transmission and emissions systems.
0 SAE - Generic
9 Transmission
9 TP Sensor Learn Not Complete
1 PCM Stack Overrun

If your vehicle failed a P0991 Fiat Stilo test and the P0991 Check Engine Light is NOT on, chances are you have a problem with the OBDII system, a burned out MIL lamp, or a faulty catalytic converter. The converter is essentially an afterburner that cleans up the exhaust after it exits the engine. The OBDII system uses P0991 a ownstream oxygen sensor to monitor the efficiency of the converter, and it should detect a drop in converter efficiency if the converter has been contaminated or is failing (ignition misfiring, leaky exhaust valves, and oil burning can all damage the converter). What you want to look P0991 DTC For Fiat Stilo: Any conditions that might cause ignition misfire, an overly rich or lean fuel condition, or loss of compression.

P0990 DTC (Previous DTC Code) ( Next DTC Code ) P0992 DTC
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