P0952Generic code

P0952 Code: Auto Shift Manual Control Circuit Low

The P0952 code means the signal from the manual shift control circuit is below its minimum value. It usually comes from a signal wire shorted to ground or a missing reference voltage. The effect is that manual mode stops working.

Severity
Low
Can I keep driving?
Yes, no immediate risk
Estimated cost
$30 to $300
Difficulty
Medium
System
Transmission
Applies to
All OBD2 vehicles

Updated Reviewed by Renzo Chacca

On this page

What the P0952 code means

In automated and automatic transmissions with a sequential mode, the lever or the steering wheel paddles send upshift and downshift commands to the computer.

It works as a switch: the computer sees a high or a low voltage depending on its position. The P0952 code is a low signal, and it usually comes from the signal wire shorting to ground or from the reference voltage going missing.

If the signal fails, manual mode stops working, but the gearbox usually carries on in automatic. On steering wheel paddles, check the clockspring.

To confirm it, unplug the component with the key on and watch what the reading or the code does. If the value jumps to the opposite extreme, the wiring is fine and the component is the one pulling the signal to ground. If nothing changes, look for the short in the wire, starting where the harness rubs against the engine, the chassis or the exhaust.

P0952 code symptoms

  • Check engine light on.
  • Manual mode disabled.

Likely causes of the P0952 code

  1. Signal wire shorted to ground. The harness rubs against the engine, the chassis or a bracket.
  2. Shorted reference supply. If several sensors fail at once, suspect the shared reference.
  3. Damaged sensor with an internal short.
  4. Connector with water or corrosion. It creates a path to ground.

How to diagnose the P0952 code step by step

  1. Read the switch or sensor value on the scan tool and compare it with what the lever or paddles are doing.
  2. Inspect the connector for corrosion, water or loose pins.
  3. Check the supply and ground with the key on: the reference should be correct and the ground should drop less than 0.1 volt.
  4. Measure the signal with the connector plugged in and see whether it changes when you move the lever or paddles.
  5. Do the wiggle test on the harness with the scan tool in graph mode.
  6. Check continuity of each wire to the computer, which should be under 1 ohm.

How to fix the P0952 code

  • Repair the connector or the wiring.
  • Replace the sensor if the tests confirm the short is inside it.
  • Correct the real condition if there is one.
  • Clear the P0952 code and verify with a road test.

Technical reference data

  • Switches or Hall sensors in the lever or in the paddles.
  • Reference values only: check the manufacturer data for your vehicle.

Brand-specific notes

On steering wheel paddles, the clockspring is a common cause of this code. If the paddles work only at certain steering angles, look there first.

Frequently asked questions about P0952

Can I drive with a P0952 code?
Yes, with caution. The gearbox usually keeps working in automatic, but manual shifting may not be available.
Does the sensor have to be replaced?
Only if the tests confirm it. The connector and the wiring fail just as often as the sensor does.
What does the manual shift control do?
In automated and automatic transmissions with a sequential mode, the lever or the steering wheel paddles send upshift and downshift commands to the computer.
How much does it cost to fix P0952?
As a rough guide, between $30 and $300. Fixing a rubbed wire costs little, while a new switch or clockspring costs more.
What does the P0952 code mean?
It means the manual shift control signal is lower than the minimum the computer allows. That usually points to a short to ground or a missing reference.
What is the most common cause of P0952?
A signal wire shorted to ground where the harness rubs on a bracket or the chassis. Water in the connector is the other usual suspect.

Related codes

Questions about the P0952 code

There are no questions about this code yet. Tell us about your case: vehicle, symptoms and what you have already checked.