B0422 Trouble Code

View B0422 obd/2 error code description and symptoms. B0422 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.

As the engine heats up and combustion becomes easier and more complete, the PCM will command the idling control valve to increase the amount of air entering the engine to suit the changing conditions. However, when the load on the engine changes, say, when some electrical consumers or other systems are either turned on or off, the PCM adapts the signal voltage to the idle control valve to ensure that the idling speed remains stable, and at the RPM specified by the manufacturer.

B0422 Error Code Repair Process :

For iat - b sensor intermittent check engine light is perhaps the most troubling of lights because it could mean so many different things, from you didn't screw the gas cap on tightly enough to look out for pistons flying through the hood and into the stratosphere. The easiest way to find out what this light is telling you is to hook your vehicle up to a scan tool. B0422 error code diagnostic tool looks a little like an oversized calculator and plugs into a communication port inside the car. After you instruct it to perform the scan, it speaks iat - b sensor intermittent with your car's computers to find out exactly what's prompting the light to turn on.

B0422 is a kind of Body Trouble Code

Auto body problems aren't always easy to spot. Diagnosing auto body problems sometimes requires a little know-how. In this section you'll find articles dedicated to teaching you how to diagnose auto body problems.

Common Causes of B0422

A common cause of code B0422 is the failure of IAT - B Sensor Intermittent, but there are several other possible causes as well, such as ;

EVAP canister or fuel tank leaks
Air fuel ratio (A/F) Sensor 1 Bank 1 harness is open or shorted
Faulty front heated oxygen sensor
Lack of fuel

B0422 code for all cars

You can view according B0422 DTC for your car model. We selected several models to see obd2 solutions click and view it.

+B0422 Aston Martin Le Mans

+B0422 Triumph Stag

+B0422 Alma Six

+B0422 Peugeot 408

+B0422 Mercedes-benz 420

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

About Us | Contact | Privacy