B0043 Oldsmobile 88 Diagnostic Trouble Code

B0043 Oldsmobile 88 code definition:
B0043 is a kind of OBD-II Diagnostic B-Body Diagnostic Trouble Code for Oldsmobile 88.

B0043 Oldsmobile 88 shows up when there's an electrical problem that causes the fuel volume regulator to malfunction and open. It's quite an unusual problem and likely intermittent. Other symptoms that may indicate this problem are when the Check Engine Light illuminates and when there is a visible lack of engine power.

Symptoms

Symptoms of a B0043 Oldsmobile 88 diagnostic trouble code may include:
  • Malfunction Indicator Lamp (MIL) illuminated
  • Carbon Buildup on O2 Sensor
  • Poor fuel economy
  • Rich or lean exhaust
Place of B0043 in engine

Possible Causes :

  • The Mass Airflow sensor will also cause this problem. Mass Airflow circuit malfunction.
  • Fuel with a large percentage of sulfur will clog the DPF quickly
  • Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.

Common Misdiagnoses

  1. Vehicle Speed Output Circuit Problem
  2. Cruise Control Servo Indicates Low Problem
  3. A/C System High Pressure High Temperature Problem
  4. PCM Stack Overrun Problem
  5. Transmission Control Module Reprogrammable Memory Problem

Repair Processes :

Find out what kind of system you have and verify that voltage to the fuel level sensor is present at the fuel pump wiring harness. Use the DVOM to test resistance and continuity on all system circuits if actuator and sensor resistance levels are in compliance with manufacturer's specifications.

Process Tips

Diagnostic trouble code B0043 Oldsmobile 88 is not difficult to diagnose and repair. Thus, it always pays to have a qualified technician to look after your vehicle should this error code arise.

Diagnosing this code requires the engine to be in good running shape, without unmetered air entering the engine. If other codes that relates to misfiring condition, lean running or air entering the engine is present, then you must first fix those error codes before B0043 Oldsmobile 88.

Fortunately, B0043 Oldsmobile 88 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

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