P0692🔧 Engine cooling (electric radiator fan)Stop and fix promptly

P0692: Cooling Fan 1 Relay Control Circuit High (Meaning, Causes, Fixes)

Reviewed 2026-10-25 · Based on 2 cited source(s)

What P0692 means

Electric fans pull air through the radiator when the car isn't moving fast enough to cool it, such as in stop-and-go traffic, on hot days or with the A/C on. The powertrain computer (PCM) switches the fan on and off based on the engine coolant temperature sensor. OBD-Codes.com explains that the PCM turns the fan on by grounding the cooling fan relay's control circuit: that circuit sits near battery voltage when the fan is off and near zero when the fan is commanded on. P0692 is set when the PCM sees that the voltage stays high while cooling fan 1 is commanded on. RepairPal defines the code a little more broadly as 'Fan 1 Control Circuit High' and says the PCM sets it when it can't control the cooling fan as desired. It is a generic code for 1996 and newer vehicles, and repair steps vary by make and model. The sources differ on symptoms: OBD-Codes.com lists engine overheating and the check engine light, while RepairPal also says the fans may stay on all the time and the A/C may not work. They also differ on causes: OBD-Codes.com names the fan relay, a blown fan fuse and, rarely, the PCM, while RepairPal adds a failed fan control module, a failed fan motor and wiring problems. P0691 is the matching 'circuit low' code, and P0480 and P0481 are related cooling fan control codes.

Severity: can I keep driving?

Stop and fix promptly

Get it fixed soon. OBD-Codes.com says overheating from cooling fans that don't run is very probable, so use caution driving and repair it as soon as possible. RepairPal rates P0692 Urgent, meaning immediate action is needed.

Common symptoms

Likely causes

Roughly most to least common, based on the sources below. Your vehicle may differ.

  1. Bad cooling fan 1 relay (OBD-Codes.com says this is the most common cause in the author's experience; RepairPal also lists it)
  2. Blown cooling fan fuse (OBD-Codes.com)
  3. Failed cooling fan motor (RepairPal)
  4. Failed engine cooling fan control module (RepairPal)
  5. Wiring problem (RepairPal)
  6. Faulty engine computer (PCM), which OBD-Codes.com says is rare (OBD-Codes.com, RepairPal)

Diagnostic steps you can do

⚠ Before you start

Work on a cool engine, parked on level ground with the parking brake set. Never work under a car supported only by a jack.

  1. Find the cooling fan relay (your owner's manual or the fuse box lid shows which one). OBD-Codes.com suggests swapping it with an identical relay from the same box, clearing the code and driving. If the code doesn't come back, replace the relay; if it does, the problem is elsewhere.
  2. Only swap relays that are identical in every way. OBD-Codes.com warns that the wrong relay can damage the PCM, and that some Nissan relays look the same apart from color and fit the same socket but are different.
  3. Check the cooling fan fuse too, since OBD-Codes.com lists a blown fan fuse as a cause. Replace it with one of the same amperage and find out why it blew.
  4. Watch the temperature gauge closely while this code is set, and pull over and shut the engine off if it starts to overheat.

Typical fixes

Repair costs vary widely by vehicle, region, parts brand and shop, so we don't quote prices. Get a written estimate after diagnosis.

🛠 When to call a pro

  • The engine is overheating or the temperature gauge is climbing
  • A known-good relay doesn't clear the code
  • Your car uses a cooling fan control module instead of a simple relay
  • Tests point to the engine computer

Where to buy

Plain search links. Always match parts to your exact year, make, model and engine.

OBD2 scanners on Amazon Parts at Advance Auto Parts catalog at RockAuto

FAQs

Can I drive with P0692?

Only with care. OBD-Codes.com says overheating from cooling fans that don't run is very probable and it should be repaired as soon as possible, and RepairPal rates it Urgent. Keep an eye on the temperature gauge and stop if it climbs.

What is the most common cause of P0692?

OBD-Codes.com's author says a faulty cooling fan relay is the most common cause in their experience. RepairPal also lists the fan motor, a fan control module, wiring and the PCM.

What's the difference between P0691 and P0692?

Per OBD-Codes.com, P0691 means the fan relay control circuit voltage is low when the fan should be off, and P0692 means it stays high when the fan is commanded on.

How much does it cost to fix P0692?

Neither source gives a repair cost for P0692. A relay or fuse is a much smaller job than a fan assembly or engine computer, so find the cause before buying parts.

Sources

  1. OBD-Codes.com: P0692 Cooling Fan 1 Relay Control Circuit High (Daniel Young, ASE Master Technician)
  2. RepairPal: P0692 Fan 1 Control Circuit High (rated Urgent)

Last reviewed 2026-10-25. Code definitions and repair steps can vary by manufacturer. Confirm with your vehicle's service information.