P0758 Shift solenoid B electrical fault

Shift solenoid B electrical

P0758 in short

P0758 means the transmission computer found an electrical fault in shift solenoid B or its circuit. The car may skip gears, start off in a higher gear or go into limp mode. Wiring, the solenoid and, on some Toyota and Ford models, the computer are common causes. Have it inspected soon.

Shift solenoid B is one of the valves the computer switches to change gear. P0758 is an electrical code: the computer saw a voltage or current on the solenoid B circuit that does not match what it commanded, as from an open or short.

Many transmissions fall back to a fixed gear when a shift solenoid fails. Ford linked P0758 to an intermittent loss of 1st and 2nd gear on some CD4E transmissions, Hyundai to a 4th-gear fail-safe, and Toyota to harsh shifts on 2001–2003 RAV4s fixed by replacing the engine computer.

Most likely causes

  1. Solenoid wiring, harness or connector fault

    Common general cause
    Why it ranks here
    P0758 is an electrical code, wiring is a listed cause, and a 2011 Sonata owner traced it to a shorted harness.
    What would change this
    Rises if the harness is chafed or the circuit is open or shorted.

  2. Faulty shift solenoid B

    Common general cause
    Why it ranks here
    The solenoid is the controlled part and the first cause code references list.
    What would change this
    Rises if the solenoid resistance is out of spec once wiring is ruled out.

  3. Engine or transmission computer (2001–2003 Toyota RAV4, some Ford CD4E)

    Supported by vehicle data
    Why it ranks here
    Toyota covers P0758 on the 2001–2003 RAV4 and owners quote the repair as engine computer replacement; Ford covers P0758 on some 2000–2001 CD4E cars.
    What would change this
    Rises on a 2001–2003 RAV4 with several solenoid codes.
    How to test the transmission control module (tcm)

  4. Low fluid or valve body problem

    Possible — needs testing
    Why it ranks here
    Code references list low fluid and the valve body, but they rarely cause an electrical code by themselves.
    What would change this
    Rises if the fluid is low and the circuit tests good.

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.

    Low riskTool: scan tool that reads the transmission module

  2. Check for a P0758 bulletin for your VIN at a dealer or on the NHTSA site.

    Low risk

  3. Have a shop check the solenoid B circuit and solenoid resistance with the wiring diagram.

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

    Warning:Shop test. It needs the maker's wiring diagram, pressure specs and test procedure.

Symptoms

  • Check engine light or flashing transmission light
  • Harsh shifts or trouble with the 2–3 shift
  • Starts off in 2nd or 3rd gear
  • Stuck in one gear, or loss of 1st and 2nd gear Gets more serious: stop and have it checked.

How to fix

  1. Do not clear the code before the transmission module has been read; the stored data helps the shop.

  2. Check the transmission fuses listed in the owner's manual before replacing parts.

  3. Ask a dealer whether your VIN has an open P0758 bulletin or software update.

Parts and cost context

  • Transmission control module (TCM):Replace a computer for P0758 only after wiring and the solenoid are checked, unless a bulletin such as Toyota's for the 2001–2003 RAV4 points to it.

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

Compare used part prices on PartPriceGuide

On your vehicle

Toyota

  • 2001–2003 · RAV4

    Supported by vehicle data

    Toyota TSB-0156-10 covers harsh shifts and the MIL with P0758 and other solenoid codes. The bulletin is on NHTSA, but whether it is still current is not verified, so it is labelled vehicle data rather than confirmed.

  • TSB-0156-10Status unverified

    Harsh shift and/or MIL with P0750, P0753, P0755, P0758 or P1760

    2001–2003rav4 · issued · NHTSA 10034126

    Covers 4-speed automatic models. Only the NHTSA flat-file summary was read, not the bulletin itself.

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

Ford

  • 2000–2001

    Supported by vehicle data

    Ford 14838 covers intermittent loss of 1st and 2nd gear with P0758 on some CD4E Contour, Escape, Mystique and Cougar. The bulletin is on NHTSA, but whether it is still current is not verified, so it is labelled vehicle data rather than confirmed.

  • 14838Status unverified

    CD4E intermittent loss of 1st and 2nd gear with P0758

    2000–2001contour, escape · issued · NHTSA 619324

    Transmissions built 7/1/2000–12/20/2000; TCIL lamp flash, MIL with P0758 or P0740. Also Mercury Mystique and Cougar. Only the NHTSA flat-file summary was read, not the bulletin itself.

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

Hyundai

  • 2010–2011

    Supported by vehicle data

    Hyundai TSB-10AT003-1 covers P0758 with a 4th-gear fail-safe on the Azera, Santa Fe, Sonata and Tucson. The bulletin is on NHTSA, but whether it is still current is not verified, so it is labelled vehicle data rather than confirmed.

  • TSB-10AT003-1Status unverified

    Transmission solenoid DTCs and 4th-gear fail-safe

    2010–2011sonata, santa-fe, tucson, azera · issued · NHTSA 10033805

    P0758 and other solenoid codes; check engine light and transaxle held in 4th. Only the NHTSA flat-file summary was read, not the bulletin itself.

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

  • P0750Shift solenoid A circuit malfunction

    Shares causes Supported by vehicle data

    Toyota lists P0750 and P0758 together on the 2001–2003 RAV4.

  • P0740Torque converter clutch control circuit fault

    Shares causes Possible — needs testing

    Ford lists P0758 or P0740 for the same CD4E loss-of-gear concern, and a Silverado owner saw both.

  • P0700Transmission module requests the check engine light

    Primary / secondary Possible — needs testing

    Likely primary: P0758. On cars with a separate transmission module a basic reader may show only P0700; P0758 can be the module's own code.

All Transmission codes

Sources and review

  1. Toyota Camry Owner's Manual (OM06291U) — Toyota
  2. P0758 OBD-II Trouble Code: Shift Solenoid B Electrical — Kelley Blue Book
  3. Cal. Code Regs. Tit. 13, § 1968.2 — Malfunction and Diagnostic System Requirements (OBD II) — California Air Resources Board (via Cornell LII)
  4. Ford 14838: CD4E intermittent loss of 1st and 2nd gear with P0758 — Ford Motor Company ,
  5. NHTSA complaint 11306939: 2011 Hyundai Sonata, P0758 — NHTSA Office of Defects Investigation
  6. Hyundai 10-AT-003-1: transmission solenoid DTCs, 4th-gear fail-safe — Hyundai Motor America ,
  7. Toyota TSB-0156-10: harsh shift and/or MIL with P0750, P0753, P0755, P0758 or P1760 — Toyota Motor North America ,
  8. NHTSA complaint 10285963: 2002 Toyota RAV4, P0758 — NHTSA Office of Defects Investigation
  9. NHTSA complaint 10836973: 2005 Chevrolet Silverado 1500, P0758 — NHTSA Office of Defects Investigation
Last reviewed
Written by
Saurabh K.
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