B0021 Plymouth Pronto OBD Code

OBD/2 B0021 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.

On some transmissions, such as automated manual transmissions or automatic transmissions with manual mode, the GSP switch lets the TCM know whether or not the driver has selected automatic or manual function. On manual transmissions, the GSP switch informs the TCM which gear the driver is selecting, and may function as a neutral safety switch, depending on system design. The TCM also uses the gate select position switch to monitor transmission operation. For example, if the driver selects manual mode and selects 3rd gear on an automatic transmission, the TCM may monitor speed sensors to detect clutch and brake slippage.

B0021 Plymouth Pronto Error Code Repair Process :

When you turn on the ignition, the Service Engine Soon or Check Engine B0021 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 throttle position sensor/switch a circuit range/performance problem 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 throttle position sensor/switch a circuit range/performance problem.

Common Causes of Plymouth Pronto B0021 OBD2 Code

A common cause of code B0021 is the failure of Throttle Position Sensor/Switch A Circuit Range/Performance Problem, but there are several other possible causes as well, such as ;

EVAP canister or fuel tank leaks
Faulty Fuel injector
Engine Control Module (ECM)
Ignition coils circuit poor electrical connection

B0021 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.

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

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B0021 Plymouth Pronto OBD Code

B0021 Plymouth Pronto Error Code Repair Process :

Common Causes of Plymouth Pronto B0021 OBD2 Code

B0021 code for other Plymouth cars