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Code P0801

Quick reference

P0801 at a glance

Plain-language meaning
This code means there's a problem with the car's system that stops you from accidentally going into reverse when you shouldn't. It's like a safety feature not working right.
Urgency
Moderate – While the vehicle may still be drivable, it is important to address the issue to prevent transmission damage.
Difficulty
Moderate
System
Transmission Control
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 car's system that stops you from accidentally going into reverse when you shouldn't. It's like a safety feature not working right.

Explanation

The P0801 code is triggered when the Powertrain Control Module (PCM) detects an open circuit in the reverse inhibit control circuit.

Technical description

The reverse inhibit control circuit is responsible for preventing the transmission from shifting into reverse under certain conditions. An open circuit in this system can prevent the proper operation of this safety feature.

Symptoms

• Check Engine Light is on

• Inability to shift into reverse

• Transmission may not operate properly

Common Causes

• Faulty reverse inhibit solenoid

• Open or shorted wiring in the reverse inhibit circuit

• Poor electrical connection at the reverse inhibit solenoid

Glossary

PCM: Powertrain Control Module

Solenoid: A device that converts electrical energy into mechanical movement

Diagnosis steps

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

• Inspect the wiring and connectors in the reverse inhibit circuit.

• Test the reverse inhibit solenoid for proper operation.

Repair procedures

• Repair or replace damaged wiring or connectors.

• Replace the reverse inhibit solenoid if faulty.

• Clear the code and test drive to ensure the issue is resolved.

Tools required

• OBD-II scanner

• Multimeter

• Basic hand tools

Estimated repair cost

$150 - $400

Difficulty level

Moderate

Commonly affected vehicles

• Ford F-150

• Chevrolet Silverado

• Toyota Camry

Preventive measures

• Regular maintenance checks

• Ensure proper electrical connections

• Avoid aggressive shifting

Error code type

Transmission Control

User experience recommendations

• Avoid driving the vehicle until repaired to prevent further damage.

• Consult a professional mechanic if unsure about repairs.

Warranty information

Check with your vehicle manufacturer; powertrain warranties may cover this issue.

Historical data

This code has been associated with vehicles that have electronic control transmissions, especially in models with advanced safety features.

Urgency level

Moderate – While the vehicle may still be drivable, it is important to address the issue to prevent transmission damage.

Testing conditions

• Vehicle in park or neutral

• Engine running

Component location

The reverse inhibit solenoid is typically located on or near the transmission.

FAQs

Q: Can I drive with a P0801 code?
A: It's not recommended as the transmission may not shift correctly, leading to potential safety issues.

Q: How do I clear a P0801 code?
A: After repairs, use an OBD-II scanner to clear the code, then test drive the vehicle to ensure the issue is resolved.

Optional diagnostic gear

Tools that may help diagnose P0801

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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