P1689 Code: Meaning, Symptoms, Causes & Fix

Overview

Code P1689 indicates a fault in Oil Pressure Control Solenoid Circuit Malfunction, typically within powertrain controls.

Symptoms

check engine light
rough operation in certain conditions
reduced performance

Common causes

Open circuit in wiring affecting oil pressure control solenoid circuit malfunction
Broken terminal inside harness
Connector pin damage/corrosion or harness stress near related components

How to diagnose P1689

Confirm P1689 and capture freeze-frame data with a professional scan tool.
Inspect wiring, connectors, and grounds related to oil pressure control solenoid circuit malfunction for obvious defects.
Use a continuity test from module pin to component to identify opens/high resistance.
Check for related DTCs to identify the root-cause chain before replacing parts.
After repair, clear codes and confirm readiness monitors complete without recurrence.

Severity of code P1689

High: This code is high severity because the affected system can directly impact drivability, safety, or catalyst/engine protection.

Can you drive with P1689?

Driving with P1689 should be limited to a short trip for diagnosis/repair. Continued driving can cause expensive secondary damage.

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

How to fix it (step-by-step)

Repair obvious wiring/connector faults first to prevent repeat parts replacement.
Address the root fault mode (open) in the oil pressure control solenoid circuit malfunction circuit/system.
Apply the required relearn/adaptation procedure if specified by service information.
Road-test and verify P1689 remains cleared under the conditions that originally set the code.

Fix options

Repair open circuit and secure connector lock.
Restore continuity and verify pin tension.
Clear DTCs and verify with live data and completed drive cycle.

Typical repair cost

$400-$2000

Common mistakes when diagnosing P1689

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.

P1689 in common vehicles

P1689 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 P1689?

P1689 is commonly set by open faults affecting oil pressure control solenoid circuit malfunction.

How much does it cost to fix P1689?

For P1689, repair costs are typically $400-$2000 depending on exact root cause, labor rates, and part quality.

Can I clear P1689 without repair?

You can clear P1689 temporarily, but the code usually returns until the underlying fault is corrected.