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Code P2A64

Quick reference

P2A64 at a glance

Plain-language meaning
This code means there's a problem with the sensor that tells the car how much fuel is in one of its special fuel tanks.
Urgency
Moderate – It should be addressed soon to ensure accurate fuel readings and prevent potential driving issues.
Difficulty
Moderate
System
Sensor Issue
Tools mentioned
OBD-II scanner, Multimeter, Basic hand tools

This summary uses the existing diagnostic information shown in full below.

Laymans terms

This code means there's a problem with the sensor that tells the car how much fuel is in one of its special fuel tanks.

Explanation

The P2A64 code is triggered when the vehicle's engine control module (ECM) detects an issue with the circuit that monitors the fuel level in the alternative fuel tank C.

Technical description

The alternative fuel tank C level sensor circuit is responsible for providing the ECM with information about the fuel level in the specific alternative fuel tank. If the ECM detects an abnormal signal or no signal from this sensor, it will trigger the P2A64 code.

Symptoms

• Check Engine Light is on

• Inaccurate fuel gauge reading

• Possible fuel system performance issues

Common Causes

• Faulty fuel level sensor

• Wiring issues such as open or short circuits

• Faulty ECM

Glossary

ECM: Engine Control Module, the computer that controls the engine's functions.

OBD-II: On-Board Diagnostics, a standardized system for vehicle diagnostics.

Diagnosis steps

• Use an OBD-II scanner to confirm the code.

• Inspect the wiring and connectors for damage or corrosion.

• Test the fuel level sensor for proper operation.

Repair procedures

• Replace the faulty fuel level sensor.

• Repair or replace damaged wiring or connectors.

• Reprogram or replace the ECM if necessary.

Tools required

• OBD-II scanner

• Multimeter

• Basic hand tools

Estimated repair cost

$100 - $500

Difficulty level

Moderate

Commonly affected vehicles

• Chevrolet Volt

• Toyota Prius

• Nissan Leaf

Preventive measures

• Regularly inspect fuel system components.

• Ensure proper maintenance of electrical systems.

• Use quality fuel to prevent sensor contamination.

Error code type

Sensor Issue

User experience recommendations

• Have a professional inspect the vehicle if unsure.

• Avoid driving long distances until the issue is resolved.

Warranty information

Check with your vehicle manufacturer for warranty coverage on fuel system components.

Historical data

This code is relatively uncommon and typically associated with vehicles using alternative fuels.

Urgency level

Moderate – It should be addressed soon to ensure accurate fuel readings and prevent potential driving issues.

Testing conditions

• Vehicle in a safe, flat location

• Engine off and cool

Component location

The alternative fuel tank C level sensor is typically located within or near the alternative fuel tank.

FAQs

Q: Can I drive with a P2A64 code?
A: It's not recommended to drive for long distances as you may not have an accurate fuel reading.

Q: What happens if I ignore this code?
A: Ignoring the code can lead to inaccurate fuel readings and potential fuel system issues.

Optional diagnostic gear

Tools that may help diagnose P2A64

THINKCAR ThinkScan Bidirectional diagnostic tool illustration

High-End · Full-system diagnostics

THINKCAR ThinkScan Bidirectional

A full-system bidirectional platform aimed at advanced DIY users and professional diagnostic workflows.

Network faults often require full-system access instead of a generic code reader alone.

View on Amazon
Klein Tools MM325 diagnostic tool illustration

Universal · Digital multimeter

Klein Tools MM325

A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.

Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.

View on Amazon
WORKPRO Wiring Repair Kit diagnostic tool illustration

Universal · Wire connectors and repair kit

WORKPRO Wiring Repair Kit

Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.

Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.

View on Amazon

These are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.

Source: ezOBD2 diagnostic database
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