Engine Coolant Temperature (ECT) Circuit High Input
What does this mean?
Code P0118 indicates the ECT sensor voltage is higher than expected, suggesting the sensor reports excessively low temperature.
Disclaimer: This diagnostic code is part of the standard OBD2 system and can apply to Bentley Flying-spur models manufactured from 1996 to 2026. However, please note that the presence of this specific code depends on your vehicle's exact engine configuration, options, and production year.
Common Causes
Faulty Engine Coolant Temperature (ECT) sensor
Damaged, chafed, or broken wiring harness
Corroded or loose electrical connector
Symptoms to Watch For
- Check Engine Light is illuminated
- Decreased fuel economy
- Difficulty starting the engine
- Engine stalls when cold
How to Diagnose
Common Solutions
Replace the Engine Coolant Temperature (ECT) Sensor: This is by far the most frequent solution for P0118. If the sensor's internal resistance is out of specification or shows an open circuit, replacing it with a high-quality OEM or equivalent aftermarket part will resolve the issue.
Repair or Replace Damaged Wiring and/or Connector: If the visual inspection or electrical tests reveal corroded, frayed, or broken wires, or a damaged electrical connector at the ECT sensor, the affected section of the harness or the connector itself must be repaired or replaced. Use proper soldering and heat-shrink techniques for durable repairs.
Repair an Open Circuit in the Signal Wire to the PCM: If diagnostic steps confirm an open circuit in the signal wire between the ECT sensor connector and the PCM, the break must be located and properly repaired. This often involves tracing the harness carefully, as damage can be hidden.