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Mazda B4000 P1391 Engine Trouble Code

Theoretically you can drive for a few weeks or even months with a broken MAF sensor. You will notice a decrease in gas mileage and over time the car will eventually start stalling a lot. At a shop, the replacement cost is between $200-$300 depending on the car, but that's usually the cost of parts because the labor is relatively simple.

Mazda B4000 P1391 Code Meaning :

P	1	3	9	1
OBD-II Diagnostic Powertrain (P) Trouble Code For Engine	Fuel And Air Metering	Throttle/Pedal Position Sensor/Switch A Circuit Intermittent	Crankshaft Position Sensor A Circuit Malfunction	Crankshaft Position Sensor A Circuit Low Input

When you check Mazda B4000 car engine light came on code P1391 the reason should be Engine Light ON (or Service Engine Soon Warning Light). However manufacturer may have a different definition for the P1391 OBD-II Diagnostic Powertrain (P) Trouble Code. So you should chech it on our car models.

P1391 Fault Symptoms :

Check engine light comes on
Engine stalling or misfiring
Engine performance issues
Car not starting

If one of these reasons for P1391 code is occuring now you should check P1391 repair processes.
Now don't ask yourself; What should you do with P1391 code ?
The solution is here :

Mazda B4000 P1391 Possible Solution :

Disconnected, dirty or fouled spark plugs are common causes for engines that won't start. Spark plugs typically need to be replaced every season or 25 hours of use. You should also check that the spark plug gap is set properly. If your spark plugs look good, problems with your ignition system can also preventing a spark. These can range from a faulty spark plug lead, shorted kill switch or flywheel key damage.

P1391 OBD-II Diagnostic Powertrain (P) Trouble Code Description

P1391 OBD-II Trouble Code Glow Plug Circuit Low Input Bank 1 is one of the definitions for the P1391; however your vehicles manufacturer may have a different definition for the P1391 code. Please check below for your specific P1391 code.

Reason For P1391 Code

The reason of P1391 OBD-II Engine Trouble Code is Throttle/Pedal Position Sensor/Switch A Circuit Intermittent.

Parts or components should not be replaced with reference to only a P1391 DTC. The vehicle service manual should be consulted for more information on possible causes of the fault, along with required testing.

	Example: 0120