Alfa Romeo 1600 P03B6 Code:

OBD-II Diagnostic Powertrain (P) Trouble Code

Trouble In Alfa Romeo 1600 P03B6 Possible Cause

The most common causes of this Alfa Romeo 1600 P03B6 code being stored are due to a defective input speed sensor or output speed sensor. Other common causes include shorted, open, corroded, or damaged wiring circuits or connectors.

Common Symptoms For Alfa Romeo 1600 P03B6

  1. Repair or replace any open, shorted, damaged, or corroded items as required and retest the system to make sure that repairs were successful
  2. Test the wiring and connectors at the fuel shutoff valve to make sure that voltage and ground readings are near battery voltage
  3. Several tools will be instrumental in successfully diagnosing this code
  4. The sensor is of the electro magnetic design and uses a reluctor ring (or a specialized set of splines) on the input shaft as reference points

Similar Problems

Fuel And Air Metering (Injector Circuit Malfunctions Only)
BBV Sensor Circuit Low Voltage
Cruise Inhibit Control Circuit

Alfa Romeo 1600 P03B6 Troubleshooting

If this is the case with the code, you will be hearing very loud noises, like explosions, from the rear of the vehicle upon acceleration. Firstly check the carburetor to ensure that the fuel and air combination are properly balanced. If these settings are correct, then thoroughly inspect the distributor cap for any cracks or hairline splits, as this can produce a backfire. Move on to the spark plugs and ensure that they are clean and undamaged and inspect the engine gaskets for any sign of damage, as they are responsible for ensuring the correct gas exchange within the engine. Alfa Romeo 1600 P03B6 OBD2 specifically refers to the camshaft (cam) timing. In this case, if the cam timing is over-retarded, the engine light will be illluminated and the code will be set.

How to turn off Alfa Romeo 1600 P03B6 check engine light ?

There are two ways to turn off the check engine light:

A repair technician can do so once repairs have been made.
The OBD II can automatically turn it off when it fails to detect the problem after several diagnostic cycles.

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