OBD Guide

P2BB8

Engine Coolant Temperature Sensor 6 Circuit Low

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$17–50 (est.)

Symptoms

  • Unstable engine idling
  • Increased fuel consumption
  • Difficulty starting the engine in cold weather
  • Incorrect temperature readings on the dashboard
  • Reduced engine power

Causes

  • Broken or damaged wires in the sensor circuit
  • Poor contact in the sensor connector
  • Coolant temperature sensor malfunction
  • Short circuit to ground in the sensor circuit
  • Engine ECU malfunction

How to Fix

  1. Check the integrity and resistance of the wires in the sensor circuit
  2. Check the quality of contacts in the sensor connector
  3. Check sensor resistance at different temperatures
  4. If necessary, replace the coolant temperature sensor
  5. Check the ECU input circuits if you suspect a malfunction

Related codes

Error P2BB8 by Vehicle Brand