P0725 Engine speed signal to the transmission computer is missing or faulty

Engine speed input circuit

P0725 in short

P0725 means the transmission computer is not getting a valid engine speed (rpm) signal. Wiring, connectors or the sensor that makes the rpm signal are the usual suspects, and on many Nissans it appears with a crankshaft sensor code and stalling. Have it inspected soon, and stop driving if the engine cuts out.

The transmission computer needs engine rpm to time shifts and control the torque converter clutch. On most vehicles that signal comes from the engine side, usually derived from the crankshaft position sensor, and is shared with the transmission computer. P0725 sets when the signal is missing or does not make sense.

Because the signal starts on the engine side, an engine sensor fault can set P0725 too. Many 2003–2006 Nissan Altima owners report P0725 together with P0335 (crankshaft position sensor) and stalling, and the stall is the dangerous part.

Bulletins exist for the 2003 Nissan Murano and the 1995–1997 Honda Accord (tachometer fluctuation). On later Nissans with a CVT, owners report P0725 alongside transmission fault codes, which needs a full transmission diagnosis.

Most likely causes

  1. Crankshaft position sensor fault (2003–2006 Nissan Altima and similar)

    Supported by vehicle data
    Why it ranks here
    Many Altima owners report P0725 together with P0335 and stalling, and shops pointed to the crankshaft position sensor.
    What would change this
    Rises when P0335 is stored too and the engine has stalled or been slow to restart.
    How to test the crankshaft position sensor

  2. Damaged wiring or loose connector in the engine speed circuit

    Common general cause
    Why it ranks here
    Damaged or corroded wires and loose connectors are standard causes, and power, ground and connector checks come first on any transmission input.
    What would change this
    Rises if the tachometer also flickers or the code comes and goes with bumps.

  3. Engine speed signal condition covered by a Nissan bulletin (2003 Murano)

    Supported by vehicle data
    Why it ranks here
    Nissan has a bulletin for P0725 engine speed signal and/or P1722 on the 2003 Murano.
    What would change this
    Rises on a 2003 Murano, especially with P1722 also stored.

  4. Tachometer and engine speed signal condition (1995–1997 Honda Accord)

    Supported by vehicle data
    Why it ranks here
    Honda has a bulletin for tachometer fluctuation and/or A/T code P0725 on these Accords.
    What would change this
    Rises on a 1995–1997 Accord with a fluctuating tachometer.

  5. CVT or transmission computer fault reported alongside P0725 (later Nissans)

    Possible — needs testing
    Why it ranks here
    Some Nissan owners report dealers diagnosing a failed CVT with P0725 among other transmission codes; the link is from complaints, not a bulletin.
    What would change this
    Rises when other CVT codes are stored and the car has drivability problems such as low power or no drive.
    How to test the transmission control module (tcm)

What to test first

Start at step 1. Each result tells you what it means and where to go next.

  1. Read codes from the engine and transmission modules with a scan tool before anything is cleared.

    Low riskTool: scan tool that reads the transmission module

  2. Check for open recalls and P0725 bulletins for your VIN at a dealer or on the NHTSA site.

    Low risk

  3. Have a shop compare the engine rpm the transmission computer sees with the engine computer's rpm, then check the signal wiring and connectors.

    Best left to a shopTool: scan tool with live data

    Warning:Shop test. Circuit checks follow the maker's wiring diagram.

Symptoms

  • Check engine light
  • Rough, late or harsh shifting
  • Tachometer or speedometer reading erratically
  • Engine stalls or is slow to restart Gets more serious: stop and have it checked.
  • Transmission stuck in one gear or reduced power (limp-home mode) Gets more serious: stop and have it checked.

How to fix

  1. Do not clear the code before both modules have been read.

  2. If P0335 is also stored, have the crankshaft position sensor fault fixed first.

  3. Ask a dealer whether your VIN has an open recall or P0725 bulletin.

Parts and cost context

  • Crankshaft position sensor:Often the source of the engine speed signal. Replace it only when P0335 or a test points to it.
  • Transmission control module (TCM):Do not replace the transmission computer for P0725 unless the signal reaches it intact and it still sets the code.

Labor varies by vehicle and shop; get a quote before you approve a repair.

Compare used part prices on PartPriceGuide

On your vehicle

Nissan

  • 2003–2006 · Altima

    Supported by vehicle data

    Owners report P0725 together with P0335 and the engine stalling or shutting off while driving; shops pointed to the crankshaft position sensor. This comes from owner complaints to NHTSA that quote a shop or dealer readout, so it is labelled vehicle data rather than confirmed.

  • 2003 · Murano

    Supported by vehicle data

    Nissan 04-061 covers P0725 engine speed signal and/or P1722. The bulletin is on NHTSA, but whether it is still current is not verified, so it is labelled vehicle data rather than confirmed.

  • 04061Status unverified

    P0725 engine speed signal and/or P1722 vehicle speed signal

    2003murano · issued · NHTSA 10007553

    Covers 2003 Murano with P0725 engine speed signal and/or P1722. Only the NHTSA flat-file summary was reviewed, not the bulletin itself.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

Honda

  • 1995–1997 · Accord

    Supported by vehicle data

    Honda 01-07-01 covers tachometer fluctuation and/or A/T code P0725. The bulletin is on NHTSA, but whether it is still current is not verified, so it is labelled vehicle data rather than confirmed.

  • 010701Status unverified

    Tachometer fluctuation and/or A/T code P0725

    1995–1997accord · issued · NHTSA 624549

    Covers 1995–1997 Accord with a fluctuating tachometer and/or automatic transmission code P0725. Only the NHTSA flat-file summary was reviewed, not the bulletin itself.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

  • P0335Crankshaft position sensor A circuit fault

    Primary / secondary Supported by vehicle data

    Likely primary: P0335. Nissan owners often see P0725 and P0335 together. Fix the crankshaft sensor fault first; P0725 can follow because the rpm signal comes from the engine side.

All Transmission codes

P0725 questions

Why does a transmission code show up with a crankshaft sensor code?

The transmission computer usually gets engine rpm from the engine side, often from the crankshaft position sensor. If that sensor fails, both P0335 and P0725 can set.

Sources and review

  1. P0725 — Engine Speed Input Circuit — Kelley Blue Book
  2. NHTSA complaint 10286311: 2005 Nissan Altima, P0725 with P0335 — NHTSA Office of Defects Investigation
  3. Cal. Code Regs. Tit. 13, § 1968.2 — Malfunction and Diagnostic System Requirements (OBD II) — California Air Resources Board (via Cornell LII)
  4. NHTSA complaint 10730920: 2006 Nissan Altima, P0725 with P0335 — NHTSA Office of Defects Investigation
  5. NHTSA complaint 10548253: 2006 Nissan Altima, P0725 with P0335 — NHTSA Office of Defects Investigation
  6. NHTSA complaint 10347913: 2003 Nissan Altima, P0725 with P0335 — NHTSA Office of Defects Investigation
  7. Tranny Problems: On the Outside Looking In — MOTOR Magazine ,
  8. Nissan 04-061: DTC P0725 engine speed signal and/or P1722 ESTM vehicle speed signal — Nissan North America ,
  9. Honda 01-07-01: tachometer fluctuation and/or A/T DTC P0725 — American Honda ,
  10. NHTSA complaint 11444640: 2015 Nissan Rogue, P0725 with CVT fault — NHTSA Office of Defects Investigation
Last reviewed
Written by
Saurabh K.
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