C0843 Trouble Code

View C0843 obd/2 error code description and symptoms. C0843 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 C0843, so consult the manual to locate the brake fluid reservoir. Bear in mind that a low fluid level can set code C0843 on some applications, so make sure that on fluid operated systems the fluid level is up to the mark before starting an electrical diagnosis.

C0843 Error Code Repair Process :

When you turn on the ignition, the Service Engine Soon or Check Engine C0843 light should flash briefly, indicating that the OBD system is ready to scan your vehicle for any malfunctions. After this brief flash, the light should stay off while you drive as long as no problems are detected. If power sliding door opened during module close command so, you'll be glad to know that your vehicle is equipped with an early warning system that could save you time, money, and fuel in addition to helping protect the power sliding door opened during module close command.

C0843 is a kind of Chassis Trouble Code

Diagnosing chassis noises can be one of the most frustrating problems technicians face. Fortunately, manufacturers have engineered noise, vibration and harshness (NVH) diagnostic techniques and equipment to find the source of the noise.

Common Causes of C0843

A common cause of code C0843 is the failure of Power Sliding Door Opened During Module Close Command, but there are several other possible causes as well, such as ;

EVAP canister or fuel tank leaks
Faulty TCM or TCM programming
Faulty ignition coil (s)
Camshaft advance mechanism binding (VCT unit)

C0843 code for all cars

You can view according C0843 DTC for your car model. We selected several models to see obd2 solutions click and view it.

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

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