P01B8

Alternative Fuel Rail Temperature Sensor Circuit Intermittent/Erratic

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$33–111 (est.)

Symptoms

Unstable engine operation
Power reduction
Increased fuel consumption
Check Engine Light Illuminates

Causes

Open or short circuit in wiring harness
Poor contact in the sensor connector
Fuel rail temperature sensor malfunction
Problems with the engine control unit (ECU)
Contact corrosion

How to Fix

Check the integrity of the sensor wiring harness
Inspect connectors and contacts for damage or corrosion
Check the resistance and signal of the temperature sensor
If necessary, replace the sensor or repair the wiring harness
Reset the error code and check if it returns

Related codes

P01B7 P01B9 P0180 P0181