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OBD-II Code

P0693

Severity

Not yet reviewed

Nobody on our side has assessed this code yet, so we are not going to guess at how serious it is.

Can you drive it

We cannot say

Treat it as unknown until a shop reads it with live data. If the check-engine light is FLASHING, stop driving as soon as it is safe to — that means an active misfire, whatever the code.

Indicative cost (USD)

$35–$400

From this code's diagnostic notes. Varies by vehicle, diagnosis, parts, and local labor. This is not a repair quote.

P0693 is the Fan 2 control circuit low version of the same fault family.

How a shop works this

Work from evidence to part, not the other way round. A code names a circuit or a symptom; it does not name the part that failed.

  1. Note every code that is set, not just this one.

    Codes that appear together usually narrow the cause faster than any one of them read alone.

  2. Read the freeze frame — the conditions the fault was recorded under.

    Cold or warm, idle or load, road speed and engine speed. A fault that only appears cold is a different fault from one that only appears under load, even with the same code on the scanner.

  3. Confirm the fault is current rather than history.

    Clear the code and see whether it returns under those same conditions. A code that does not come back may have been logged during a repair, a flat battery, or a bad connection that has since been disturbed.

  4. Then follow the diagnostic notes further down this page, in the order they are written.

    They are written in the order a shop works this code, cheapest checks first. Where they name a component, inspect its wiring and connector before replacing it.

If the code comes back after a repair, the underlying fault is still there. That is the point to bring in a scanner with live data and freeze-frame, or a shop that has one.

Common symptoms

  • Check engine light
Read the full diagnostic procedureP0693 is the Fan 2 control circuit low version of the same fault family.

P0693 is the Fan 2 control circuit low version of the same fault family. On dual-fan applications fan 2 is the auxiliary or secondary fan, commanded on at higher ECT or with A/C high-side pressure above about 250 psi.

Cheapest-first ladder

  1. key-on engine-off, unplug the fan 2 relay or the fan 2 driver pin at the FCM and check the PCM control wire for a short to ground (should sit at battery voltage with no PCM command; 0 V at this measurement means the wire is grounded between PCM and relay).
  2. Measure relay coil resistance (50 to 90 ohms typical); a shorted coil reads under 10 ohms and confirms the relay is the cause.
  3. On scan-tool-commanded fan-on, expect 0 V on the control wire (low-side driver pulling to ground), current draw 3 to 25 A inrush settling to 4 to 15 A steady on a typical 12 to 14 inch electric fan, and less than 0.3 V drop across the fan power feed terminal under load.
  4. For PWM fan 2 outputs, duty cycle should ramp 0 to 100% smoothly as commanded; a clipped or stuck-high duty reading at the PCM monitor pin points to either the driver or the harness.
  5. Expensive-misdiagnosis caveat: fan resistor packs are the common consumable on multi-speed fan systems.
  6. Ford, GM, and Toyota all use 3-step fan resistor packs that burn open at the high-current stage; on dual-fan Toyota V6 platforms the resistor pack feeds both fans through staged relays, so a single failed pack will trip either P0691 or P0693 depending on which fan the PCM is currently commanding.
  7. Replace the pack, $40 to $120, before assuming the second fan motor failed.
Vehicle-specific patterns2011-2014 Ford F150 5.0 Coyote doesn't use a fan 2 on the single-PWM setup, so P0693 on this platform points to a misdiagnosis or to the FCM internal…
  • 2011-2014Ford F150 5.0 Coyote doesn't use a fan 2 on the single-PWM setup, so P0693 on this platform points to a misdiagnosis or to the FCM internal logic flagging a phantom output; verify scan-tool freeze-frame before chasing wiring.
  • 2007-2014GM Silverado/Tahoe/Yukon dual-system trucks throw P0693 from the electric secondary fan relay shorted to ground after coolant intrusion into the underhood fuse block (upper radiator hose drip is the classic source); $35 relay plus connector cleanup.
  • 2007-2017Toyota Camry V6 2GR-FE dual fan throws P0693 most commonly from the resistor pack high-stage open or from the fan 2 motor brushes worn out after 150k miles drawing under 1 A at command; pack first ($50 to $90), motor second ($180 to $320).
  • 2006-2015Honda Civic/Accord single-fan platforms don't have a fan 2 circuit; on Honda Pilot/Odyssey J35 V6 dual-fan setups P0693 is usually the auxiliary fan relay or chafed harness at the radiator support, $40 to $120.

Estimated repair$35 to $400.

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