Q: Is it safe to drive with C1098 active?

Driving is possible but ABS will be disabled. Avoid hard braking and slippery conditions. Get it fixed ASAP.

Q: How much does it cost to fix C1098?

Repair costs typically range $200–$800. DIY diagnosis with a multimeter can save on labor.

Q: Will the warning light go off on its own?

If the fault is intermittent, the light may turn off after several drive cycles. However, the underlying issue should still be addressed. ---

This diagnostic article is an original guide created by AIscanAuto for educational and troubleshooting purposes. The technical information about OBD2 DTC codes is based on publicly available automotive diagnostic standards and industry best practices. External links provided are for additional reading and context only — they do not imply endorsement or ownership of third-party content. All repair procedures should be performed by qualified technicians.

DTC C1098: C1098 — ABS Hydraulic Pump Motor Circuit Short To Battery: Causes, Symptoms & Fix

The C1098 OBD2 fault code relates to the ABS Hydraulic Pump Motor circuit. This is part of the vehicle's chassis control system. When the short to battery, the control module cannot properly monitor or regulate this system, which may affect braking, traction, stability, or suspension performance. At AIscanAuto, we help drivers quickly identify OBD2 trouble codes, understand their root causes, and find the right fix — with AI-powered diagnostics that go beyond basic code reading.

C1098 — ABS Hydraulic Pump Motor Circuit Short To Battery: Causes, Symptoms & Fix

The C1098 OBD2 fault code relates to the ABS Hydraulic Pump Motor circuit. This is part of the vehicle's chassis control system. When the short to battery, the control module cannot properly monitor or regulate this system, which may affect braking, traction, stability, or suspension performance.

At AIscanAuto, we help drivers quickly identify OBD2 trouble codes, understand their root causes, and find the right fix — with AI-powered diagnostics that go beyond basic code reading.

Symptoms

ABS warning light on
Brake pedal feels different (harder or softer)
ABS not activating during hard braking
Possible grinding noise from ABS pump
Traction control disabled

Common Causes

Faulty component — internal damage or wear affecting the ABS Hydraulic Pump Motor
Wiring issues — broken, corroded, or chafed wires in the circuit
Connector problems — loose, oxidized, or moisture-damaged pins
a short to battery voltage is detected — connects the signal line directly to 12V, causing constant high voltage
Control module fault — rare, but the chassis control module may have an internal fault

Step-by-Step Diagnosis

Scan with OBD2 tool — Confirm C1098 is active. Check for additional chassis DTCs.
Visual inspection — Examine the ABS Hydraulic Pump Motor wiring and connector for corrosion or damage.
Check voltage and ground — Use a multimeter to verify proper reference voltage.
Test component — Compare readings to factory specs. A stuck or erratic signal confirms failure.
Check for shorts/opens — Perform continuity tests on the wiring between the component and control module.

Repair & Solutions

If the component is defective, replace the ABS Hydraulic Pump Motor with an OEM or quality aftermarket part.
Repair any damaged wiring or connectors using proper methods.
Clear the DTC with an OBD2 scanner and test drive to verify the code does not return.
If the code persists after component replacement, inspect the control module connector or consider module testing.

Related Codes

C1095 — ABS Hydraulic Pump Motor Circuit Failure
C1096 — ABS Hydraulic Pump Motor Circuit Open
C1097 — ABS Hydraulic Pump Motor Circuit Short To Ground

External References & Forum Discussions

Forum discussion

DTC C1098: C1098 — ABS Hydraulic Pump Motor Circuit Short To Battery: Causes, Symptoms & Fix

C1098 Diagnostic Trouble Code