Powertrain, generic · Computer and auxiliary outputs

P063F Auto Configuration Engine Coolant Temperature Input Not Present

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

Some modules configure themselves at start-up by detecting which inputs are present. P063F means the module expects a coolant temperature input but does not detect it during this self-configuration. It differs from the circuit codes P0117/P0118 (signal low/high) and the plausibility codes P0116, P0125 and P0128, which judge a present signal. No manufacturer document or patent available to us describes this check; the explanation is derived from the J2012 wording. CARB requires the coolant temperature sensor to be monitored for circuit, range and warm-up. Possible causes are an unplugged NTC sensor, an open wire or software for a different vehicle. Expect a substitute temperature, a constantly running fan, a dead temperature gauge and poorer cold starts.

Likely causes

Coolant temperature sensor not connected, connector or wire open
Wrong module software or variant
Faulty sensor
Internal module fault

Symptoms

  • Check engine light
  • Radiator fan runs constantly
  • Temperature gauge not working
  • Poor cold start, higher consumption

Repair estimate

DifficultyEasyDIY possible
Parts and labour€30–400
Time0.3–1.5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

engine coolant temperature sensorsensor wiringengine control module

Related codes

P063EP0115P0117P0118P0125P060F

References: law.cornell.edu, en.wikipedia.org.