AutoCodes – Generic – C1097

C1097 Code - ABS Hydraulic Pump Motor Circuit Short To Ground

Quick Answer

The Anti-Lock Brake System (ABS) prevents wheel lock-up by monitoring the wheel speed sensors and actuating Hydraulic Control Unit (HCU) modulating the brake pressure to prevent wheel lockup. Common causes include Low Brake Fluid, Faulty ABS Hydraulic Pump Motor, ABS Hydraulic Pump Motor harness is open or shorted. 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: C1097 indicates ABS Hydraulic Pump Motor Circuit Short To Ground.
Common causes: Common causes include Low Brake Fluid, Faulty ABS Hydraulic Pump Motor, ABS Hydraulic Pump Motor harness is open or shorted.
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 8,094

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 Aug 11, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C1097 Description

The Anti-Lock Brake System (ABS) prevents wheel lock-up by monitoring the wheel speed sensors and actuating Hydraulic Control Unit (HCU) modulating the brake pressure to prevent wheel lockup. By preventing the wheels from locking up, the driver is able to maintain steering control and stop in the shortest possible distance under most conditions. The traction control system is controlled by the Powertrain Control Module (PCM) and utilizes the ABS module for wheel speed information only. Engine Only Traction Control (EOTC) helps maintain vehicle control during acceleration by modulating engine torque when driving on slippery or loose surfaces.
The ABS Module monitors the ABS Hydraulic Pump Motor. The ABS Module sets the OBDII code when the ABS Hydraulic Pump Motor is not to factory specifications.

OBDII Code C1097 - ABS Hydraulic Pump Motor Circuit Short To Ground - AutoCodes.com — C1097 Code - ABS Hydraulic Pump Motor Circuit Short To Ground

What does this mean?

What are the Possible Causes of the DTC C1097?

Low Brake Fluid
Faulty ABS Hydraulic Pump Motor
ABS Hydraulic Pump Motor harness is open or shorted
ABS Hydraulic Pump Motor circuit poor electrical connection

How to Fix the DTC C1097?

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 C1097 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.

Need more information about the C1097 code?

Need more information on how to fix the C1097 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1097 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

C1097 Ford — ABS Hydraulic Pump Motor Circuit Short To Ground
C1097 Lincoln — ABS Hydraulic Pump Motor Circuit Short To Ground
C1097 Mercury — ABS Hydraulic Pump Motor Circuit Short To Ground

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 C1097 Code

What does the OBDII code C1097 mean?

C1097 indicates a short circuit to ground in the ABS hydraulic pump motor circuit, which can affect the operation of the anti-lock braking system (ABS).

What are common symptoms of a C1097 code?

Common symptoms include the ABS warning light illuminating on the dashboard, reduced braking performance, and potential loss of ABS functionality.

What might cause the C1097 code to trigger?

Possible causes include damaged wiring or connectors in the ABS pump circuit, a faulty ABS pump motor, or a malfunctioning ABS control module.

Can I drive my vehicle with a C1097 code?

While you can drive your vehicle, it is not recommended since the ABS may not function properly, increasing the risk of skidding or losing control in emergency braking situations.

How can I diagnose a C1097 code?

Start by visually inspecting the wiring and connectors for damage, then use a multimeter to check for continuity in the ABS pump circuit and test the pump motor for proper operation.

What are some common repair steps for a C1097 code?

Repair steps may include fixing or replacing damaged wiring or connectors, replacing the ABS pump motor, or replacing the ABS control module if it's found to be defective.

Will clearing the C1097 code fix the problem?

Clearing the code may temporarily turn off the warning light, but the underlying issue must be addressed to ensure the ABS system functions correctly and the code does not return.

How much does it typically cost to repair a C1097 code?

Repair costs can vary widely depending on the cause, but you might expect to pay anywhere from $100 to $1,000 or more for parts and labor, especially if the ABS control module needs replacement.

Is it safe to ignore the C1097 code?

Ignoring the C1097 code is not safe, as it can lead to compromised braking performance and increased risk of accidents due to the malfunctioning ABS system.