P0937 Code: Meaning, Symptoms, Causes & Fix

Overview

Code P0937 indicates a fault in Hydraulic Oil Temperature Sensor Circuit, typically within powertrain controls.

Symptoms

reduced performance
increased fuel use
check engine light

Common causes

Open circuit in wiring affecting hydraulic oil temperature sensor circuit
Broken terminal inside harness
Connector pin damage/corrosion or harness stress near related components

How to diagnose P0937

Confirm P0937 and capture freeze-frame data with a professional scan tool.
Inspect wiring, connectors, and grounds related to hydraulic oil temperature sensor circuit 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 P0937

Moderate: This code is moderate severity: the vehicle may still operate, but fault progression can increase repair cost over time.

Can you drive with P0937?

Most vehicles can be driven short-term with P0937, but postpone heavy load/highway driving until repaired.

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 hydraulic oil temperature sensor circuit circuit/system.
Apply the required relearn/adaptation procedure if specified by service information.
Road-test and verify P0937 remains cleared under the conditions that originally set the code.

Fix options

Clear corrosion and protect terminals.
Repair open circuit and secure connector lock.
Clear DTCs and verify with live data and completed drive cycle.

Typical repair cost

$200-$900

Common mistakes when diagnosing P0937

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.

P0937 in common vehicles

P0937 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 P0937?

P0937 is commonly set by open faults affecting hydraulic oil temperature sensor circuit.

How much does it cost to fix P0937?

For P0937, repair costs are typically $200-$900 depending on exact root cause, labor rates, and part quality.

Can I clear P0937 without repair?

You can clear P0937 temporarily, but the code usually returns until the underlying fault is corrected.