Powertrain, generic · Fuel and air metering

P0182 Fuel Temperature Sensor A Circuit Low

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modeNo

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. P0182 means the signal is below its valid range – with an NTC that points to a short to ground or an internally shorted sensor, and the control module would read about 150 °C. Limits: Ford diesel below 0.095 V, Ford petrol below 0.12 V for 5 s, GM diesel below 50 Ω (two trips), GM 6.6 litre below 0.60 V for 5 s, Saab EDC16 below 0.23 V for 0.6 s with a substitute value of 50 °C. Genuinely hot fuel within the valid range is P0168 instead.

Likely causes

Signal wire shorted to ground (chafing)
Sensor shorted internally
Moisture or corrosion in the connector
Engine control module

Symptoms

  • Check engine light on
  • Fuel temperature in scan data implausibly high (about 150 °C)
  • Possibly cold-start problems

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€50–350
Time0.5–2.5 h

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

Parts involved

fuel temperature sensor asensor wiring

Related codes

P0183P0181P0184P0187P0168

References: law.cornell.edu, fordservicecontent.com, fordservicecontent.com, gsi.ext.gm.com.