P0666 Engine Error Code

When you check engine light came on code P0666 the reason should be Engine Light ON (or Service Engine Soon Warning Light). However your vehicle's manufacturer may have a different definition for the P0666 OBD-II Diagnostic Powertrain (P) Trouble Code. So you should chech it on your car models.

P0666 Code Symptoms

P0666 OBD 2 code on vehicles with electronically controlled automatic transmissions, the 3-4 shift solenoid is responsible for actuating the hydraulic circuits to activate clutches or bands that change gears inside the automatic transmission.

The firing order is an important part of the overall design of the engine and is determined during the design of the engine to eliminate as much engine vibration as possible. If the firing order is changed or adjusted, the ignition from the spark plug is delivered at the wrong time and the engine functions poorly or does not run. The firing order for a particular engine is typically found in the repair manual specific to that model.

P0666 OBD-II Diagnostic Powertrain (P) Trouble Code Description P0666 PCM/ECM/TCM Internal Temperature Sensor A Circuit so you have to check ODB-II Engine Error Code list. P0666 Code Review : The reason of P0666 OBD-II Engine Error Code is P0666 PCM/ECM/TCM Internal Temperature Sensor A Circuit.

P0666 Code Dictionary Meaning:

p - Powertrain Code - Problem is related engine, transmission and emissions systems. 0 - SAE - Generic 6 - Vehicle Speed Control And Idle Control System 6 - Vehicle Speed Output Circuit 6 - Transmission Control Module Reprogrammable Memory

How long can you drive with a P0666 code ?

If your vehicle is displaying a P0666 OBD2 error code but is still running and driving normally, it means that the issue might not be immediately critical or causing immediate harm to the vehicle. However, it's important to address the issue as soon as possible for several reasons:

• Potential for Worsening
• Decreased Fuel Efficiency
• Emissions Testing Compliance
• Risk of Further Damage
• Safety Concerns
• Legal Considerations