Code Search

Please fill the "Code Box" to find engine fault code.

Car Models :

Please select your car.

How To Clear Check Engine Lights ?

Ways to clear check engine light on car panel.

Check Engine Light Dictionary

Ways to clear check engine light on car panel.

P1478 Engine Trouble Code

Meaning of P1478 engine trouble code is a kind of powertrain trouble code and 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 $240-$400 depending on the car, but that's usually the cost of parts because the labor is relatively simple.

P1478 Fault Symptoms :

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

If one of these reasons for P1478 code is occuring now you should check P1478 repair processes.
Now don't ask yourself; What should you do with P1478 code ?
The solution is here :

P1478 Possible Solution:

Power Steering Pressure (PSP) Switch Malfunction In Key On, Engine Off Self-Test, this DTC indicates the PSP input to the PCM is high. In Key On, Engine Running Self-Test, this DTC indicates that the PSP input did not change state. Steering wheel must be turned during Key On, Engine Running Self-Test PSP switch/shorting bar damaged SIG RTN circuit open PSP circuit open or shorted to SIGRTN PCM damaged.

P1478 Code Meaning :

P	1	4	7	8
OBD-II Diagnostic Powertrain (P) Trouble Code For Engine	Fuel And Air Metering	O2 Sensor Heater Circuit Malfunction	Cylinder 10 Contribution/balance Fault	Clutch Position Sensor Circuit 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.

P1478 OBD-II Diagnostic Powertrain (P) Trouble Code Description

P1478 OBD-II Trouble Code Cooling Fan Driver Fault is one of the definitions for the P1478; however your vehicles manufacturer may have a different definition for the P1478 code. Please check below for your specific make. P1478 code.

Main reason For P1478 Code

The reason of P1478 OBD-II Engine Trouble Code is O2 Sensor Heater Circuit Malfunction.

P1478 DTC reports a sensor fault, replacement of the sensor is unlikely to resolve the underlying problem. The fault is most likely to be caused by the systems that the sensor is monitoring, but might even be caused by the wiring to the sensor itself.

	Example: 0140