P01A1

Alternative Fuel Tank A Pressure Sensor Circuit High

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Switching to the main fuel type
Reduced engine power
Check Engine Light Illuminates
Unstable operation of the engine using alternative fuel

Causes

Malfunction of the fuel tank pressure sensor A
Open or short circuit in wiring harness
Problems with the sensor connector contacts
ECU malfunction
Corrosion or oxidation of contacts

How to Fix

Check the integrity of the sensor wiring harness
Check the connections and contacts of the sensor connector
Measure resistance and voltage at the sensor
Replace pressure sensor if necessary
Clean contacts from corrosion
Check the operation of the computer

Related codes

P01A0 P01A2 P0172