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Code P2A96

Quick reference

P2A96 at a glance

Plain-language meaning
This code means there's a problem with the part of the car that switches between different fuel tanks. It's like a switch that isn't working right.
Urgency
Moderate – It may affect fuel switching but is not immediately dangerous.
Difficulty
Moderate
System
Control Circuit Performance
Tools mentioned
OBD-II scanner, Multimeter, Wrench set

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

Laymans terms

This code means there's a problem with the part of the car that switches between different fuel tanks. It's like a switch that isn't working right.

Explanation

The P2A96 code is triggered when the Engine Control Module (ECM) detects a performance issue in the control circuit of the alternative fuel tank select valve B.

Technical description

The alternative fuel tank select valve B is responsible for switching between different fuel sources in vehicles that use more than one type of fuel. This code indicates that the ECM has detected a problem with the performance of the control circuit for this valve, which could be due to electrical issues or mechanical failure.

Symptoms

• Check Engine Light is on

• Difficulty switching between fuel tanks

• Possible fuel delivery issues

Common Causes

• Faulty alternative fuel tank select valve B

• Wiring issues in the control circuit

• Faulty ECM or control module

Glossary

ECM: Engine Control Module

OBD-II: On-Board Diagnostics II

Diagnosis steps

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

• Inspect the wiring and connectors for damage or corrosion.

• Test the alternative fuel tank select valve B for proper operation.

Repair procedures

• Repair or replace damaged wiring or connectors.

• Replace the alternative fuel tank select valve B if faulty.

• Reprogram or replace the ECM if necessary.

Tools required

• OBD-II scanner

• Multimeter

• Wrench set

Estimated repair cost

$150 - $500

Difficulty level

Moderate

Commonly affected vehicles

• Chevrolet Volt

• Toyota Prius

• Honda Civic Hybrid

Preventive measures

• Regular maintenance checks on fuel system components.

• Ensure proper installation of fuel system parts.

• Keep electrical connections clean and secure.

Error code type

Control Circuit Performance

User experience recommendations

• Avoid switching fuel types until the issue is resolved.

• Consult a professional mechanic for accurate diagnosis.

Warranty information

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

Historical data

This code is more common in vehicles with dual-fuel systems and has been reported since the introduction of hybrid and alternative fuel vehicles.

Urgency level

Moderate – It may affect fuel switching but is not immediately dangerous.

Testing conditions

• Vehicle running on alternative fuel

• Attempting to switch fuel tanks

Component location

The alternative fuel tank select valve B is typically located near the fuel tanks or within the fuel system assembly.

FAQs

Q: Can I drive with this code?
A: It's possible to drive, but you may experience issues with fuel switching. It's best to get it checked soon.

Q: Will this code affect my fuel efficiency?
A: Yes, it could affect fuel efficiency if the vehicle cannot switch to the most efficient fuel source.

Optional diagnostic gear

Tools that may help diagnose P2A96

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.

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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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