P3691 Fiat Punto OBD Code

OBD/2 P3691 error code description and symptoms.

Mass Air Flow (MAF) Sensor Intermittent The MAF sensor circuit is monitored by the PCM for sudden voltage (or air flow) input change through the comprehensive component monitor (CCM). If during the last 40 warm-up cycles in key ON engine running the PCM detects a voltage (or air flow) change beyond the minimum or maximum calibrated limit, a continuous memory diagnostic trouble code (DTC) is stored.

A good starting point in your diagnosis is checking all system fuses and fusible links. This can be done using the DVOM on the voltage setting. You will want to test the fuses with circuits loaded. Some fuses will appear normal until a load is placed on their respective circuit; at which point they will fail. This has been the cause of many 'phantom malfunctions'. Consult your vehicle information source for fuse and fusible link locations. If all fuses are in working order, you may want to check TCM relay operation by swapping identical relays. Usually the horn relay, starter relay, fuel pump relay, air conditioning clutch relay, and controller relays are similar enough in design to swap for diagnostic purposes.

P3691 Fiat Punto Error Code Repair Process :

If your left front vertical accelerometer circuit failure 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 P3691 and engine control unit are in charge of monitoring a bunch of different left front vertical accelerometer circuit failure, and if they get a reading that's a little out of whack, up pops the check engine light.

Common Causes of Fiat Punto P3691 OBD2 Code

A common cause of code P3691 is the failure of Left Front Vertical Accelerometer Circuit Failure, but there are several other possible causes as well, such as ;

Damaged camshaft position (CMP) sensor
Engine Control Module (ECM)
Faulty ignition coil (s)
Foreign matter caught in fuel filler cap

P3691 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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P3691 Fiat Punto OBD Code

P3691 Fiat Punto Error Code Repair Process :

Common Causes of Fiat Punto P3691 OBD2 Code

P3691 code for other Fiat cars