P0636

Power Steering Control Circuit Low

Q: Is it safe to drive with P0636?

You can drive, but steering effort may increase, especially when parking. Be cautious at low speed and have it repaired promptly.

Q: Can I just clear P0636?

It will return while the circuit reads low. Fix the wiring, connections, or module — and rule out low battery voltage — first.

Power steering Generic OBD-II Medium

What it means

P0636 means the power-steering control circuit is reading lower voltage than expected, so the module cannot drive the steering assist as intended. On electric or electro-hydraulic systems this can reduce or disable power assist, making the wheel feel heavy. It is usually a wiring, connection, or module fault, and low battery voltage can also set it.

Medium

Can I keep driving? Driveable, but steering may feel heavy — especially at low speed and parking. Take extra care and get it fixed soon.

Real-world scan data

Seen in

scans in the past year

Found in

<0.1%

of scans

<0.1%

of scans that found faults

Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.

Common symptoms

What you'll notice

Power-steering warning light on
Heavy, stiff, or unresponsive steering
Reduced steering assist, worst at low speed
Check-engine light on

Common causes

Most likely first

Open or short-to-ground in the power-steering control wiring (low voltage)Likely
Loose or corroded connections in the power-steering circuitCommon
Faulty power-steering control module or actuatorCommon
Low system/battery voltage or a charging-system problemLess often

How to diagnose & fix

Work through it in order

Read freeze-frame data and confirm the control circuit reads low.
Check battery and charging-system voltage, since low voltage can trigger this code.
Inspect the power-steering control wiring and connectors for opens, shorts, or corrosion.
Test the power-steering control module/actuator against specification.
Repair the wiring or replace the module as needed, then clear and re-test.

FAQ

Quick answers

Is it safe to drive with P0636?+

You can drive, but steering effort may increase, especially when parking. Be cautious at low speed and have it repaired promptly.

Can I just clear P0636?+

It will return while the circuit reads low. Fix the wiring, connections, or module — and rule out low battery voltage — first.

Read & clear P0636 yourself

Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.

▶ Get it on Google Play

✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX