P01AE medium Severity

P01AE: Alternative Fuel Tank Temperature Sensor Circuit Intermittent/Erratic

Check Engine Light may be illuminated; possible impact on fuel temperature readings and fuel metering accuracy.

Overview

P01AE OBD-II code indicates an intermittent or erratic signal in the alternative fuel tank temperature sensor circuit, often related to flexible fuel or alternative fuel vehicle systems.

Common Symptoms

  • Check Engine Light illuminated
  • Inaccurate fuel temperature readings
  • Possible slight impact on fuel economy or performance

Most Common Causes

Faulty alternative fuel tank temperature sensor medium

Sensor may send intermittent or erratic signals causing the code set.

Damaged or corroded wiring/connectors in the sensor circuit medium

Wiring harness issues can cause intermittent signal problems.

Faulty ECU/PCM interpretation low

Less common cause where control module misreads the correct signal.

Diagnostic Steps

  1. Connect a professional diagnostic scanner and confirm P01AE is present and check freeze frame data.
    Expected: P01AE is stored; freeze frame shows sensor data at fault time.
    Interpretation: Verifies the code and context of occurrence.
  2. Visually inspect the wiring and connectors for the alternative fuel tank temperature sensor.
    Expected: No frayed wires, corrosion, or loose connectors.
    Interpretation: Identifies any physical damage causing intermittent circuit issues.
  3. Measure sensor resistance/voltage with a multimeter according to OEM spec.
    Expected: Sensor readings within manufacturer specification range.
    Interpretation: Determines if the sensor itself is functioning correctly.
  4. If wiring and sensor check are normal, test/scan ECM responses or replace the sensor.
    Expected: Circuit operates normally after repair or replacement.
    Interpretation: Confirms that repair resolved intermittent circuit signal issue.

Repair Solutions

Replace alternative fuel tank temperature sensor medium
Estimated Cost: $150 - $350

Cost includes parts and labor; varies by vehicle and location.

Repair or replace damaged wiring/connectors medium
Estimated Cost: $50 - $200

Depends on extent of wiring damage and accessibility.

ECU/PCM repair or reprogramming hard
Estimated Cost: $300 - $800

Only if confirmed as control module interpretation issue; less common.

Common Misdiagnoses

Avoid these common diagnostic mistakes:

  • Fuel pressure sensor circuit fault (incorrectly attributed by some generic DTC databases)

Frequently Asked Questions

What does a P01AE diagnostic trouble code signify?

When your OBD-II scanner reads P01AE, it means: Alternative Fuel Tank Temperature Sensor Circuit Intermittent/Erratic. This code is related to the vehicle's Fuel System.

Reflecting on severity: How bad is P01AE?

The P01AE code is considered medium severity. Check Engine Light may be illuminated; possible impact on fuel temperature readings and fuel metering accuracy.

Common signs of the P01AE error code

Common symptoms include: Check Engine Light illuminated, Inaccurate fuel temperature readings, Possible slight impact on fuel economy or performance. You might also notice the Check Engine Light is on.

Why is my car throwing a P01AE code?

The most common causes are: Faulty alternative fuel tank temperature sensor, Damaged or corroded wiring/connectors in the sensor circuit, Faulty ECU/PCM interpretation.

Is P01AE expensive to fix?

It depends on what needs to be fixed. Repair or replace damaged wiring/connectors repairs are cheaper (~$200), while ECU/PCM repair or reprogramming repairs are on the higher end (~$800).

Does code P01AE apply to Dodge vehicles?

Yes, P01AE is a generic code that applies to all OBD-II compliant vehicles, including Ford, Toyota, Honda, Chevrolet, Nissan, Dodge, BMW, and more.

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