U2947 Subaru R2 OBD Code

OBD/2 U2947 error code description and symptoms.

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.

At this point we are assuming that the fuses and relays are good. You will need to locate the PCM/TCM and the power input signal circuit using your vehicle information source. Unplug the connector from the PCM/TCM, place the ignition switch in the ON position, and probe the appropriate circuit with the positive test lead of the DVOM.

U2947 Subaru R2 Error Code Repair Process :

For throttle/petal position sensor/switch c circuit malfunction 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. U2947 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 throttle/petal position sensor/switch c circuit malfunction with your car's computers to find out exactly what's prompting the light to turn on.

Common Causes of Subaru R2 U2947 OBD2 Code

A common cause of code U2947 is the failure of Throttle/Petal Position Sensor/Switch C Circuit Malfunction, but there are several other possible causes as well, such as ;

EVAP canister or fuel tank leaks
Faulty Air Flow Meter
Faulty Crankshaft Position Sensor (POS)
Foreign matter caught in fuel filler cap

U2947 is a kind of Network Trouble Code

U-code indicates that engine communication errors and shows lost communication with engine parts.U-Codes are fairly straight forward, given all of the articles and technical publications that have been written regarding these problematic codes. In most cases, it just comes down to identifying the module that isn't communicating with the other modules on the CAN bus line for whatever reason.

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

About Us | Contact | Privacy

U2947 Subaru R2 OBD Code

U2947 Subaru R2 Error Code Repair Process :

Common Causes of Subaru R2 U2947 OBD2 Code

U2947 code for other Subaru cars