What does the diagnostic code p0128 mean?

OBD II Fault Code

• OBD II P0128

Fault Code Definition

• Engine temperature has not increased and/or reached the correct level within a specified amount of time after engine startup

Symptoms

• http://wiki.answers.com/check-engine-lighton
• Vehicle may not shift into the highest gear at freeway speed
• Decrease in fuel economy
• In unusual cases, there are no adverse conditions noticed by the driver

Common Problems That Trigger the P0128 Code

• Defective Engine http://wiki.answers.com/thermostat
• Defective Engine http://wiki.answers.com/engine-coolant-temperature-sensor
• Defective Intake Air Temperature Sensor
• Defective http://wiki.answers.com/cooling-system
• Low http://wiki.answers.com/coolant
• Dirty Engine Coolant, causing incorrect Coolant Temperature Sensor readings
• Defective, always running http://wiki.answers.com/engine-cooling-fan

Common Misdiagnoses

• Engine http://wiki.answers.com/cooling-fan-operation
• Internal http://wiki.answers.com/engineproblem
• http://wiki.answers.com/oxygen-sensorproblem
• Engine Coolant Temperature Sensor problem