P1703 Code: Meaning, Symptoms, Causes & Fix

Overview

Symptoms

• increased fuel use
• reduced performance
• rough operation in certain conditions

Common causes

• Control module logic or calibration issue affecting brake switch out of self test range
• Component failure in the monitored system
• Connector pin damage/corrosion or harness stress near related components

How to diagnose P1703

1. Confirm P1703 and capture freeze-frame data with a professional scan tool.
2. Inspect wiring, connectors, and grounds related to brake switch out of self test range for obvious defects.
3. Use freeze-frame and live data to isolate whether the issue is electrical, mechanical, or control logic.
4. Check for related DTCs to identify the root-cause chain before replacing parts.
5. After repair, clear codes and confirm readiness monitors complete without recurrence.

Severity of code P1703

Low: This code is low to moderate severity in most cases, but diagnosis is still recommended to avoid recurring warnings.

Can you drive with P1703?

The vehicle is often drivable with P1703, but plan a repair window to prevent repeat faults.

If the warning lamp is flashing or drivability/safety is affected, avoid driving and diagnose immediately.

How to fix it (step-by-step)

1. Repair obvious wiring/connector faults first to prevent repeat parts replacement.
2. Address the root fault mode (generic) in the brake switch out of self test range circuit/system.
3. Apply the required relearn/adaptation procedure if specified by service information.
4. Road-test and verify P1703 remains cleared under the conditions that originally set the code.

Fix options

• Inspect circuit and connector condition.
• Test component operation and replace if faulty.
• Clear DTCs and verify with live data and completed drive cycle.

Typical repair cost

$100-$450

Common mistakes when diagnosing P1703

• Replacing parts without verifying voltage, ground, and signal integrity first.
• Ignoring related stored/pending codes that indicate upstream faults.
• Skipping post-repair verification drive cycle and readiness checks.

P1703 in common vehicles

P1703 appears across makes such as BMW, Mercedes-Benz, Audi, Volvo. Failure patterns differ by platform: wiring routes, software calibration, and component supplier revisions can change root cause.

Frequently asked questions

What causes P1703?

P1703 is commonly set by generic faults affecting brake switch out of self test range.

How much does it cost to fix P1703?

For P1703, repair costs are typically $100-$450 depending on exact root cause, labor rates, and part quality.

Can I clear P1703 without repair?

You can clear P1703 temporarily, but the code usually returns until the underlying fault is corrected.

Helpful tools

• Estimate repair cost
• Decode your VIN
• Calculate fuel cost