Ford Crestline C2703 Code:

OBD-II Diagnostic Chassis (C) Trouble Code

Trouble In Ford Crestline C2703 Possible Cause

Possible causes of Ford Crestline C2703 include a faulty oxygen sensor, faulty electrical connector at the oxygen sensor, faulty or shorted wiring in the oxygen sensor circuit, a blown fuse for the oxygen sensor (if applicable), low or excessive fuel pressure, a vacuum leak on the engine, excessive exhaust leaks, or a faulty PCM.

Common Symptoms For Ford Crestline C2703

  1. Always clear codes and retest the system to ensure a successful repair has been performed. If all system circuits are intact, connect the oscilloscope and observe live transmission input/output speed sensor data
  2. Look for shorted or burned wiring and replace circuitry and connectors as required
  3. Many vehicle applications utilize an electronically controlled valve in the automatic transmission cooler lines to regulate the flow of fluid to the cooler itself
  4. To perform a thorough diagnosis, any transmission leaks should be repaired and the transmission should be filled with the proper amount and type of fluid (if the fluid smells really "burnt" and you are experienced enough to detect it, you may go ahead and condemn the transmission)

Similar Problems

Vehicle Speed Control And Idle Control System
Control Module Throttle Actuator Position Performance
A/C System High Pressure High Temperature

Ford Crestline C2703 Troubleshooting

Having one of the signs of a bad gasket is usually not enough to prove a failure of a gasket, but multiple symptoms are most likely the result of gasket failure. It is advisable to have the vehicle driven as little as possible whenever the symptoms occur. Depending on the symptoms, either have the gasket replaced or repaired.
The cost of replacing a gasket usually varies from one mechanic to the other. Replacing a gasket is quite expensive in modern engines due to their location and the amount of labor that is required to replace them. Ford Crestline C2703 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 Ford Crestline C2703 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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