P1991 Maserati 420 OBD Code

OBD/2 P1991 error code description and symptoms.

The Throttle Position sensor signals the Engine Control Module as to the current position of the engine throttle valve.
The current throttle valve opening is based on the driver's input from the gas pedal. The ECM uses the information from this sensor to help calculate fuel delivery and spark timing.

To check for an open circuit, trace along the length of the transmission control circuit, checking for breaks in the wiring. Repair any broken wiring and make sure all connectors are fully seated and locked.Pay close attention to connectors, looking for corrosion, bent or broken pins, or moisture in the connector. Repair any connector issues even if they are not specifically part of the transmission control circuit as they may serve a function in providing power to the transmission control circuit.

P1991 Maserati 420 Error Code Repair Process :

If your secondary air injection system switching valve a circuit malfunction check engine light is illuminated, it's best to take it in for diagnostic testing, which can feel like a hassle. Because while the lights vary in appearance from vehicle to vehicle, all have the same basic meaning: There's a problem with the car's emissions system. The on-board diagnostics system P1991 and engine control unit are in charge of monitoring a bunch of different secondary air injection system switching valve a circuit malfunction, and if they get a reading that's a little out of whack, up pops the check engine light.

Common Causes of Maserati 420 P1991 OBD2 Code

A common cause of code P1991 is the failure of Secondary Air Injection System Switching Valve A Circuit Malfunction, but there are several other possible causes as well, such as ;

Damaged ECM
Faulty select solenoid
Faulty Variable Camshaft Timing (VCT) position solenoid
Fuel pressure

P1991 is a kind of Powertrain Trouble Code

Powertrain of a modern automobile, comprising engine (with exhaust system), transmission, drive shaft, suspension and the wheels. In a motor vehicle, the term powertrain or powerplant describes the main components that generate power and deliver it to the road surface, water, or air.

Engine OBD 2 Codes website is a freeware resource center for engine trouble codes.

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P1991 Maserati 420 OBD Code

P1991 Maserati 420 Error Code Repair Process :

Common Causes of Maserati 420 P1991 OBD2 Code

P1991 code for other Maserati cars