P0696 moderate

Cooling Fan 3 Control Circuit High

The P0696 code means the vehicle's onboard diagnostic system has detected: Cooling Fan 3 Control Circuit High. This is a moderate severity code.

My Garage →

Keep driving?: Short distances only
DIY difficulty: moderate
Estimated cost: $50 - $500 (parts and labor)

Recommended Tool

ANCEL AD310 OBD-II Scanner

Best-selling code reader on Amazon. Reads and clears check engine codes on any 1996+ vehicle. Under $30.

Check Price on Amazon

Affiliate link -- we earn a commission at no extra cost to you.

Every Tech Needs This

AstroAI Digital Multimeter

Essential for diagnosing sensor codes, checking voltage, and testing circuits. Under $15 and pays for itself on the first job.

Check Price on Amazon

Affiliate link -- we earn a commission at no extra cost to you.

Common Symptoms

Check Engine Light on
Fan 3 stays on continuously
Reduced system performance
Warning indicators on dashboard

Probable Causes (Ranked by Likelihood)

Short to power in fan 3 control circuit Very High
Wiring damage or corrosion in the circuit High
Poor electrical connection at module or component Moderate
ECM or control module internal failure Low

Step-by-Step Diagnostic Procedure

Use a scan tool to read data related to Cooling Fan 3 Control
Inspect all related wiring, connectors, and grounds for damage, corrosion, or loose connections
Measure circuit voltage, resistance, and continuity to identify the fault type
Check for technical service bulletins related to this code for your specific vehicle

Frequently Asked Questions

What is cooling fan 3?

Some vehicles have multiple cooling fans. Fan 3 is typically an additional auxiliary cooling fan. Each fan has its own control circuit.

Can P0696 cause overheating?

If fan 3 is not operating properly, cooling capacity is reduced. This may cause overheating during idle, low-speed driving, or when the AC is running, especially in hot weather.

Should I replace the fan motor or the relay?

Start with the relay as it is less expensive and easier to replace. If the relay tests good, check wiring for shorts. The fan motor is typically the last component to test.