P01AA

Alternative Fuel Tank Temperature Sensor Circuit

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Unstable engine operation
Increased fuel consumption
Difficulty starting the engine
Check Engine Light Illuminates

Causes

Faulty alternate fuel tank temperature sensor
Open or short circuit in wiring harness
Poor connection in the sensor connector
Problems with the engine control unit

How to Fix

Check the integrity of the wiring harness and connectors
Check the resistance of the temperature sensor
Replace temperature sensor if necessary
Clean or replace connectors if corroded

Related codes

P01AB P01AC P0180