P1390 Trouble Code

View P1390 obd/2 error code description and symptoms. P1390 engine photo

Low Speed Fuel Pump Primary Circuit Malfunction The PCM monitors the low speed fuel pump (LFP) primary circuit output from the PCM.
The test fails if: When the LFP circuit is commanded on (grounded), excessive current draw is detected on the LFP circuit; or when the LFP circuit is commanded off, voltage is not detected on the LFP circuit (the PCM expects to detect VPWR voltage coming through the low speed fuel pump relay coil to the LFP circuit). Open or shorted low fuel pump (LFP) circuit Open VPWR to low speed fuel pump relay Damaged low speed fuel pump relay Damaged PCM An open circuit or short to ground can only be detected with the low speed fuel pump.

Some systems require that the actuator has an adequate supply of brake fluid. Low brake fluid levels can mimic the symptoms of code P1390, so consult the manual to locate the brake fluid reservoir. Bear in mind that a low fluid level can set code P1390 on some applications, so make sure that on fluid operated systems the fluid level is up to the mark before starting an electrical diagnosis.

Difficulty Level (Soso)
Level
Repair Time (50 Min.)
Time
Cost Prediction : $ 40-75

P1390 Error Code Repair Process :

If your p1390 octane adjust pin out of self test range 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 P1390 and engine control unit are in charge of monitoring a bunch of different p1390 octane adjust pin out of self test range, and if they get a reading that's a little out of whack, up pops the check engine light.

Wrench Tool P1390 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.

Common Causes of P1390

A common cause of code P1390 is the failure of P1390 Octane Adjust Pin Out Of Self Test Range, but there are several other possible causes as well, such as ;

P1390 code for all cars

You can view according P1390 DTC for your car model. We selected several models to see obd2 solutions click and view it.

+P1390 Pontiac Torrent +P1390 Abarth 210 +P1390 Oldsmobile Trofeo +P1390 Wolseley 12 +P1390 Volkswagen 1302

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

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