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B20F6 Oldsmobile Curved Dash Diagnostic Trouble Code

B20F6 Oldsmobile Curved Dash code definition:
B20F6 is a kind of OBD-II Diagnostic B-Body Diagnostic Trouble Code for Oldsmobile Curved Dash.

B20F6 Oldsmobile Curved Dash is defined as Knock Sensor Circuit Range Performance (Bank 1 or Single Sensor). This refers to camshaft timing, which in this case is over-retarded. The PCM then uses this data to provide the right strategies for the fuel delivery and ignition timing of the engine.

Symptoms

Symptoms of a B20F6 Oldsmobile Curved Dash diagnostic trouble code may include:

• Cherry red hot catalytic converter
• Poor acceleration
• The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.
• Diminished fuel efficiency

Possible Causes : The Mass Airflow sensor is a hot wire that senses the volume of air entering the intake manifold. The computer uses this information to control fuel mixture. Defective ECU strategies or components will prevent proper regeneration An air leak forward of the DPF will change the sensor readings resulting in the code

Common Misdiagnoses

1. TP Sensor Learn Not Complete Problem
2. Low Coolant Circuit Problem
3. Cruise Control System - Vehicle Accel Too High Problem
4. TFP Valve Position Switch-Drive Without Drive Ratio Problem
5. Problem

Repair Processes :

With the valve disconnected, the red voltmeter lead should be attached to the IMRC valve power wire and the black voltmeter lead connected to ground. Look for rubbing, scraping, bare wires, worn spots or melted plastic connectors. Pull the connectors apart and carefully look at the terminals (the metal parts) inside the connectors.

Process Tips

Diagnostic trouble code B20F6 Oldsmobile Curved Dash 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 B20F6 Oldsmobile Curved Dash.

Fortunately, B20F6 Oldsmobile Curved Dash is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

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