Error code

OBD2 P0183

OBD2P0183
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Fuel Temperature Sensor A Circuit High.

Severity

moderateCan drive but expect poor fuel economy and potential performance issues.

Summary

P0183 indicates that the fuel temperature sensor A is providing an abnormally high voltage signal to the ECM, suggesting a lower than normal fuel temperature reading.

Symptoms

  • Poor fuel economy
  • Hard starting
  • Poor performance

Common Causes

  • Electrical short circuit or open circuit in wiring between the fuel temperature sensor and ECM.
  • Faulty fuel temperature sensor (FTS) itself.
  • Defective ECM due to water entry, corrosion, or collision damage.

Diagnosis

  1. Check for proper resistance across the two pins at the ECM side of the circuit.
  2. Inspect wiring harness for signs of damage or corrosion, especially in areas prone to water entry.
  3. Test fuel temperature sensor directly and compare its resistance with values from repair manual.

Fixes

  • Replace faulty wiring harness or connectors.
  • Replace defective fuel temperature sensor if resistance is out of expected range.

FAQ

What should I do if the MIL light comes on with P0183?

Check for wiring issues or a faulty fuel temperature sensor. If unsure, consult a professional mechanic.

Can I drive my car with this code present?

Yes, but expect poor fuel economy and potential performance issues until the problem is resolved.

View source

Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.

More OBD2 codes

All OBD2 codes →Search more codes →