P0180 Fuel Temperature Sensor A Circuit

Fuel temperature sensor A is an NTC thermistor: the hotter the fuel, the lower its resistance and signal voltage. On diesels it sits in the injection pump, rail or return line; on Ford petrol direct-injection engines it is built into the rail pressure sensor, and GM uses digital rail temperature sensors on its direct-injection engines. P0180 is the general circuit fault without telling low from high. None of the manufacturers checked (GM, Ford, Saab/Bosch, Nissan) uses it – they report P0181–P0184 instead. No manufacturer document using exactly this code was found; the description rests on CARB's circuit monitoring requirement and component information. With a sensor fault the control module uses a substitute temperature (Saab EDC16: 50 °C).

Likely causes

Symptoms

• Check engine light on
• Substitute value; possibly starting problems in cold or hot conditions

Repair estimate

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

Parts involved

Related codes

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