Auto Shift Manual Control Circuit Intermittent
The P0954 code means the vehicle's onboard diagnostic system has detected: Auto Shift Manual Control Circuit Intermittent. This is a serious severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- hard
- Estimated cost
- $200 - $2,500 (parts and labor)
Read and clear transmission codes. Many trans codes are caused by low or burnt fluid -- check level and color before assuming the worst.
Basic scanners only read engine codes. This reads transmission, ABS, and airbag too.
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Common Symptoms
- Check Engine Light on
- A scan tool shows Auto Shift Manual Control Circuit Intermittent as the stored fault
- Drivability may be normal - many faults in this circuit show no symptom the driver notices
- The system may fall back to a default strategy until the fault is cleared
Probable Causes (Ranked by Likelihood)
- Wiring or connector fault at the auto shift manual control circuit - chafed harness, corroded pins, or a loose ground High
- Failed auto shift manual control circuit Medium
- A supply or reference voltage problem shared with other circuits, which usually sets companion codes too Medium
- Control module fault - rare, and only after the wiring and the component have both been ruled out Low
Frequently Asked Questions
Can I keep driving with P0954?
Yes, with the repair booked. This is a fault in the selector CIRCUIT that reports manual-mode shift requests, not a mechanical transmission failure. The transmission normally keeps working in fully automatic mode - expect manual/tiptronic selection to stop responding rather than the vehicle to be undriveable.
What does P0954 mean?
Auto Shift Manual Control Circuit Intermittent. That definition comes from SAE J2012, the standard that assigns generic OBD-II trouble code meanings.
Is P0954 the same on every vehicle?
The definition is standardized, but the exact test that sets it, the specified voltages and the physical location of the component vary by make and model. Check your vehicle's service information for those.
Mechanics Guide Step-by-step diagnosis
Step-by-Step Diagnostic Procedure
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Read ALL stored codes first. Faults in this area often set several codes at once, and the cheapest cause is usually shared wiring rather than the part.
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Inspect the connector and harness at the auto shift manual control circuit for corrosion, backed-out pins, and chafing before testing anything electrically.
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Back-probe the circuit with the connector attached and compare the reading against the manufacturer's specification for your vehicle - generic values do not apply across makes.
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Check power, ground and reference voltage feeding the circuit before condemning the component.
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Replace the component only after the wiring tests good. Confirm the repair by clearing the code and verifying it does not return under the conditions that set it.
Sources 2
This page is built from documented references. Verify against your own service info before repair work.
- SAE J2012Diagnostic Trouble Code Definitions (defines the generic OBD-II code ranges)
- Cross-checked against the SAE J2012:2002 DTC table (2026-08-27)archived scan of the SAE standard — readable copy, not SAE’s current edition
Commonly Affected Vehicles
- 2010-2020 Ford F-150
- 2012-2019 Chevrolet Silverado
- 2011-2020 Toyota Camry
- 2009-2019 Honda Accord
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