Error code

OBD2 P0185

OBD2P0185
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Fuel Temperature Sensor B Circuit.

Severity

moderateYou can drive the vehicle but expect poor performance and reduced fuel efficiency.

Summary

P0185 indicates a malfunction in the fuel temperature sensor B circuit on your vehicle. This code is related to issues with wiring or the ECM.

Symptoms

  • Poor fuel economy
  • Hard starting
  • Poor performance

Common Causes

  • Electrical short circuit or open circuit due to water entry, corrosion, or wire harness damage.
  • Faulty fuel temperature sensor B or ECM (less common).

Diagnosis

  1. Use a digital volt-ohm meter (DVOM) to check for proper resistance in the FTS circuit.
  2. Inspect connectors for bent pins, corrosion, or water intrusion.
  3. Test the fuel temperature sensor B directly and compare its resistance with values from your repair manual.

Fixes

  • Repair damaged wiring or replace faulty components in the FTS circuit.

FAQ

What should I do if my fuel temperature sensor B is faulty?

If you confirm that the fuel temperature sensor B is faulty, it may need to be replaced. However, ensure that wiring and connectors are also checked for any issues.

View source

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

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