B3021 Peugeot Vroomster OBD Code

OBD/2 B3021 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.

A good starting point in your diagnosis is checking all system fuses and fusible links. This can be done using the DVOM on the voltage setting. You will want to test the fuses with circuits loaded. Some fuses will appear normal until a load is placed on their respective circuit; at which point they will fail. This has been the cause of many 'phantom malfunctions'. Consult your vehicle information source for fuse and fusible link locations. If all fuses are in working order, you may want to check TCM relay operation by swapping identical relays. Usually the horn relay, starter relay, fuel pump relay, air conditioning clutch relay, and controller relays are similar enough in design to swap for diagnostic purposes.

B3021 Peugeot Vroomster Error Code Repair Process :

For engine speed input circuit range/performance 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. B3021 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 engine speed input circuit range/performance with your car's computers to find out exactly what's prompting the light to turn on.

Common Causes of Peugeot Vroomster B3021 OBD2 Code

A common cause of code B3021 is the failure of Engine Speed Input Circuit Range/Performance, but there are several other possible causes as well, such as ;

EVAP canister or fuel tank leaks
Failures of clutch motion/travel sensors.
Air fuel ratio (A/F) Sensor 1 Bank 1 harness is open or shorted
Open VPWR circuit

B3021 Peugeot Vroomster OBD Code

B3021 Peugeot Vroomster Error Code Repair Process :

Common Causes of Peugeot Vroomster B3021 OBD2 Code

B3021 code for other Peugeot cars