P0732 Transmission computer sees the wrong speed ratio in second gear

Gear 2 incorrect ratio

P0732 in short

P0732 means the transmission computer measured input and output speeds that do not match second gear, so second is slipping or not engaging. Bulletins point to low line pressure, internal faults on older Fords and software on some Chrysler and Jeep models. Have it inspected soon and check for a bulletin first.

The transmission computer knows which gear it has asked for and reads the speed going in and the speed coming out. If the two speeds do not match the ratio of gear two, the gear is slipping or not fully engaged, and the computer sets this code.

Older Ford bulletins tie P0732 to a missing 1-2 upshift, or to low line pressure with slipping shifts. Chrysler and Jeep have transmission computer updates for some newer models, and Ford lists P0732 among its 10R80 shift codes.

A scan for other codes and a bulletin check by VIN come first. Most real repairs are inside the transmission.

Most likely causes

  1. Low line pressure (older Ford 4R44E/5R55E family)

    Supported by vehicle data
    Why it ranks here
    Ford ties low line pressure at full throttle, slipping shifts and P0732 together on 1995–2002 Explorer, Ranger and related models.
    What would change this
    Rises if a shop measures low line pressure on a covered Ford.

  2. Internal fault giving no 1-2 upshift

    Supported by vehicle data
    Why it ranks here
    Ford bulletins link a missing 1-2 upshift with P0732 on several older transmissions.
    What would change this
    Rises if the car holds first gear and never shifts into second.

  3. Transmission computer software

    Supported by vehicle data
    Why it ranks here
    FCA updates the transmission computer on some Pacifica and Wrangler models with P0732, and an earlier Chrysler bulletin pairs P0732 with shift quality improvements.
    What would change this
    Rises on a covered 2017 Pacifica or 2021 Wrangler that has not had the update.
    How to test the transmission control module (tcm)

  4. Input or output speed sensor giving a false reading

    Possible — needs testing
    Why it ranks here
    The ratio is worked out from speed sensor signals, so a bad sensor or connection can make a healthy gear look wrong. Ford ties an output speed sensor fault in the 6R80 leadframe to P0731.
    What would change this
    Rises if a speed sensor code is also stored or a sensor reading drops out on the scan tool.

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 that supports both, before anything is cleared. Note every code, not just this one.

    Low riskTool: scan tool that reads the transmission module

  2. Check for a P0732 bulletin or software update for your VIN at a dealer or on the NHTSA site.

    Low risk

  3. Have a transmission shop check line pressure with a gauge and watch commanded gear and speed sensor readings on a road test.

    Best left to a shopTool: scan tool with transmission data and output controls

    Warning:Shop test. It is done while driving or on a lift, often with pressure gauges, and needs the maker's procedure.

Symptoms

  • Check engine light
  • No shift from first to second, or a slipping 1-2 shift Gets more serious: stop and have it checked.
  • Shudder or poor shift quality on some Chrysler models
  • Transmission stuck in one gear (limp-home mode) Gets more serious: stop and have it checked.

How to fix

  1. Do not clear the code before the transmission module has been read.

  2. Ask a dealer whether your VIN has an open P0732 bulletin or software update. Chrysler, Jeep and Ford have issued them.

Parts and cost context

  • Transmission control module (TCM):Do not replace the module for P0732 unless a test points to it. The Chrysler and Jeep fixes are software updates to the existing module.

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

Compare used part prices on PartPriceGuide

On your vehicle

Chrysler

  • 2017 · Pacifica

    Supported by vehicle data

    FCA 21-008-21 updates the transmission computer software for P0732 and other codes. The bulletin is on NHTSA, but whether it is still current is not verified, so it is labelled vehicle data rather than confirmed.

  • 21-008-21Status unverified

    Transmission computer software update

    2017pacifica · issued · NHTSA 10190702

    Reprograms the transmission computer after a MIL with transmission codes including P0732. 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.

  • 2100207Status unverified

    Torque converter shudder, shift quality improvements, P0732

    2007300, pacifica, sebring · issued · NHTSA 10021089

    Addresses torque converter shudder and shift quality and lists P0732. Dodge and Jeep models are also listed. 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.

Jeep

  • 2021 · Wrangler

    Supported by vehicle data

    FCA 21-028-21 updates the transmission computer software for P0732 and other codes. The bulletin is on NHTSA, but whether it is still current is not verified, so it is labelled vehicle data rather than confirmed.

  • 21-028-21Status unverified

    Transmission computer software update

    2021wrangler · issued · NHTSA 10218592

    Reprograms the transmission computer after a MIL with transmission codes including P0732. 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.

Ford

  • 1995–2002 · Explorer

    Supported by vehicle data

    Ford 15887 links P0732 to a missing 1-2 or 2-3 upshift, and 02138 links it to low line pressure on trucks built before 1 December 2001. The Ranger is also covered. The bulletins are on NHTSA, but whether they are still current is not verified, so it is labelled vehicle data rather than confirmed.

    Where it is:Inside the transmission

  • 2004–2005 · Freestar

    Supported by vehicle data

    Ford 041512 covers no 1-2 upshift with P0732 on the 4F50N. The Taurus is also covered. The bulletin is on NHTSA, but whether it is still current is not verified, so it is labelled vehicle data rather than confirmed.

  • 041512Status unverified

    4F50N no 1-2 upshift and P0732

    2004–2005freestar, taurus · issued · NHTSA 10011157

    Covers a 4F50N transaxle with no 1-2 upshift and P0732. 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.

  • 15887Status unverified

    No 1-2 or 2-3 upshift, P0732 or P0733

    1995–2002explorer, ranger, explorer-sport-trac, aerostar · issued · NHTSA 637755

    Some vehicles may have no 1-2 or 2-3 upshift, no engine braking in manual 1, or P0732 or P0733. 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.

  • 02138Status unverified

    Low line pressure at wide open throttle with P0732 / P0733 / P1762

    1995–2002explorer, ranger, explorer-sport-trac, aerostar · issued · NHTSA 635998

    Low line pressure at full throttle with slipping shifts or delayed engagement, on vehicles built before 1 December 2001. 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.

  • P0700Transmission module requests the check engine light

    Primary / secondary Possible — needs testing

    Likely primary: P0732. On cars with a separate transmission module, a basic code reader may show only P0700, which means the module has stored its own code. P0732 can be that code, so fix P0732 and P0700 goes with it.

  • P0731Transmission computer sees the wrong speed ratio in first gear

    Shares causes Supported by vehicle data

    GM tied P0731 and P0732 to the same intermittent no-power condition on the 4T80-E.

  • P0733Transmission computer sees the wrong speed ratio in third gear

    Shares causes Supported by vehicle data

    Older Ford bulletins list P0732 and P0733 together for missing upshifts and low line pressure.

  • P0734Transmission computer sees the wrong speed ratio in fourth gear

    Same system Possible — needs testing

    Both are gear ratio checks on the same transmission, for different gears.

All Transmission codes

P0732 questions

What does P0732 feel like?

Often a missing or slipping shift from first to second, so the engine revs without the car picking up speed. Some cars show only the light.

Is it safe to drive with P0732?

Have it inspected soon. Toyota tells owners to get the car checked right away when the light is on for the transmission. If it starts slipping or will not shift, get it checked before relying on it.

Can a software update fix P0732?

On some models, yes. Chrysler and Jeep have transmission computer updates for P0732, so ask a dealer to check your VIN first.

Sources and review

  1. Toyota Camry Owner's Manual (OM06291U) — Toyota
  2. Cal. Code Regs. Tit. 13, § 1968.2 — Malfunction and Diagnostic System Requirements (OBD II) — California Air Resources Board (via Cornell LII)
  3. Ford 02138: Low line pressure at wide open throttle, slipping shifts, P0732 / P0733 / P1762 — Ford Motor Company / NHTSA ,
  4. Ford 041512: 4F50N no 1-2 upshift and P0732 — Ford Motor Company / NHTSA ,
  5. Ford 15887: No 1-2 or 2-3 upshift, P0732 or P0733 — Ford Motor Company / NHTSA ,
  6. FCA 21-008-21: TCM software update, 2017 Pacifica — FCA US LLC / NHTSA ,
  7. FCA 21-028-21: TCM software update, 2021 Wrangler — FCA US LLC / NHTSA ,
  8. Chrysler 2100207: Torque converter shudder, shift quality improvements, P0732 — Chrysler LLC / NHTSA ,
  9. Tranny Problems: On the Outside Looking In — MOTOR Magazine ,
  10. Ford 19N01-S3: 6R80 molded leadframe extended coverage, 2011–2013 F-150 and 2012–2013 Expedition/Navigator — Ford Motor Company / NHTSA ,
  11. DTC P0700 — Saab 9-5 (9650) 2010 Workshop Information System — SaabWISOnline (community rehost of Saab/GM service information)
  12. GM 010730009A: Intermittent no power with P0731 / P0732, 4T80-E — General Motors / NHTSA ,
  13. On-Board Diagnostic Trouble Codes (generic code title list) — Delaware Division of Motor Vehicles
Last reviewed
Written by
Saurabh K.
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