AutoCodes – Pontiac – P0801 Pontiac

P0801 Pontiac Code - Reverse Inhibit Solenoid Control Circuit

Quick Answer

An ignition voltage is supplied to the Reverse Inhibit solenoid. Common causes include Faulty Reverse Inhibit Solenoid, Reverse Inhibit Solenoid harness is open or shorted, Reverse Inhibit Solenoid circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P0801 Pontiac indicates Reverse Inhibit Solenoid Control Circuit.
Common causes: Common causes include Faulty Reverse Inhibit Solenoid, Reverse Inhibit Solenoid harness is open or shorted, Reverse Inhibit Solenoid circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 2,589

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 08, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0801 Pontiac Description

An ignition voltage is supplied to the Reverse Inhibit solenoid. The Powertrain Control Module (PCM) controls the solenoid by grounding the control circuit via an internal switch called a driver. The driver supplies the ground for the component being controlled. Each driver has a fault line which the PCM monitors. When the PCM commands a component ON, the voltage of the control circuit should be low (near 0 volts). When the PCM commands the control circuit to a component OFF, the voltage potential of the circuit should be high (near battery voltage). If the fault detection circuit senses a voltage other than what is expected, the fault line status changes causing the P0801 code to set.

OBDII Code P0801 Pontiac - Reverse Inhibit Solenoid Control Circuit - AutoCodes.com — P0801 Pontiac Code - Reverse Inhibit Solenoid Control Circuit

What does this mean?

What are the Possible Causes of the DTC P0801 Pontiac?

Faulty Reverse Inhibit Solenoid
Reverse Inhibit Solenoid harness is open or shorted
Reverse Inhibit Solenoid circuit poor electrical connection

How to Fix the DTC P0801 Pontiac?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0801 Pontiac code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0801 Pontiac Code

What does the OBDII code P0801 mean for a Pontiac?

Code P0801 indicates a problem with the Reverse Inhibit Solenoid Control Circuit, which prevents the vehicle from shifting into reverse under certain conditions.

What are the symptoms of P0801 in a Pontiac?

Symptoms may include difficulty engaging reverse gear, the transmission remaining in neutral, or an illuminated check engine light.

What causes the P0801 code in a Pontiac?

Common causes include a faulty reverse inhibit solenoid, damaged wiring or connectors in the control circuit, or issues with the transmission control module (TCM).

Can I drive my Pontiac with the P0801 code?

While the vehicle may still be drivable, avoiding reverse gear could limit its usability and lead to further damage if the issue isnâ€™t addressed promptly.

How do I diagnose the P0801 code in my Pontiac?

Start by visually inspecting the reverse inhibit solenoid and its wiring for damage. Use a multimeter to test the circuit and check for proper voltage signals from the TCM.

How is the P0801 code fixed in a Pontiac?

Repairs may involve replacing the reverse inhibit solenoid, repairing or replacing damaged wiring or connectors, or reprogramming or replacing the TCM.

Does the P0801 code require professional repair?

While some experienced DIYers may attempt repairs, diagnosing and fixing transmission-related codes often requires specialized tools and knowledge, making professional assistance advisable.

How much does it cost to fix the P0801 code in a Pontiac?

Repair costs can range from $150 to $500 or more, depending on whether the solenoid, wiring, or TCM needs replacement and labor charges.

What tools are needed to troubleshoot the P0801 code?

Youâ€™ll need an OBDII scanner, a multimeter, and possibly wiring diagrams for your Pontiac to properly diagnose the issue.

Can a transmission fluid issue cause the P0801 code?

While unlikely, low or contaminated transmission fluid can sometimes contribute to solenoid-related problems, so checking fluid condition is recommended.