B1681 Mercedes Glk OBD Code

OBD/2 B1681 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.

Circuit High Input codes like B1681 are mostly caused by defective alternators that develop excessive voltages, although there may be other causes as well, such as short circuits that 'leak' current into a particular system from other, unrelated systems that work on higher voltages. Note that in the case of short circuits that leak power into a control circuit, there is likely to be other, seemingly unrelated trouble codes present along with the code(s) being investigated. Diagnosing a 'high input' code will always involve a thorough testing of the charging system as a first step, followed by measures to isolate the system from all other possible sources of power during resistance, continuity, and reference voltage tests.

B1681 Mercedes Glk Error Code Repair Process :

The scent may B1681 signal oil or coolant leaking from their normally closed-loop systems, or it may indicate dangerous exhaust gases invading your car's interior. Car and truck exhaust contains toxic gases such B1681, so if the inside of your car b1681 pats transceiver module signal is not received as if you were standing behind your car, get out and get it fixed. Fight the urge to take a little nap first. So sleepy. That's the carbon monoxide talking, friends. At least open a window on your way to the shop.

Common Causes of Mercedes Glk B1681 OBD2 Code

A common cause of code B1681 is the failure of B1681 PATS Transceiver Module Signal Is Not Received, but there are several other possible causes as well, such as ;

EVAP canister or fuel tank leaks
Faulty starter motor
Faulty spark plug (s)
Faulty ignition coil (s)

B1681 Mercedes Glk OBD Code

B1681 Mercedes Glk Error Code Repair Process :

Common Causes of Mercedes Glk B1681 OBD2 Code

B1681 code for other Mercedes cars