P0694 Buick Code - Cooling Fan 2 Control Circuit High
Quick Answer
The Engine Control Module (ECM) grounds the low-speed relay, which is the Fan Low relay, and the high-speed relay, which is the Fan High relay, control circuits through an internal solid-state device called a driver. Common causes include Faulty Cooling Fan 2 Relay, Cooling Fan 2 Relay harness is open or shorted, Cooling Fan 2 Relay circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P0694 Buick indicates Cooling Fan 2 Control Circuit High.
- Common causes
- Common causes include Faulty Cooling Fan 2 Relay, Cooling Fan 2 Relay harness is open or shorted, Cooling Fan 2 Relay circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P0694 Buick Description
What are the Possible Causes of the DTC P0694 Buick?
- Faulty Cooling Fan 2 Relay
- Cooling Fan 2 Relay harness is open or shorted
- Cooling Fan 2 Relay circuit poor electrical connection
- Faulty Cooling Fan 1
- Faulty Engine Control Module (ECM)
How to Fix the DTC P0694 Buick?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0694 Buick code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P0694 Buick Code
1. What does the OBDII code P0694 mean on a Buick?
P0694 indicates a problem with the Cooling Fan 2 Control Circuit, specifically that the circuit voltage is higher than expected.
2. What are the common symptoms of code P0694 in a Buick?
Symptoms may include the cooling fan running constantly, overheating, reduced engine performance, or the Check Engine Light illuminating.
3. What causes the P0694 code in a Buick?
Common causes include a faulty cooling fan relay, damaged wiring or connectors in the fan circuit, a malfunctioning cooling fan motor, or a defective engine control module (ECM).
4. Can I drive my Buick with a P0694 code?
Driving with a P0694 code is not recommended, as it can lead to engine overheating or damage if the cooling fan system is not functioning properly.
5. How do I diagnose a P0694 code on my Buick?
Start by inspecting the cooling fan relay, wiring, and connectors for damage or corrosion. Use a multimeter to check circuit continuity and voltage, and test the cooling fan motor for proper operation.
6. How can I fix the P0694 code on a Buick?
Repairs may involve replacing a faulty cooling fan relay, repairing damaged wiring, replacing the cooling fan motor, or, in rare cases, reprogramming or replacing the ECM.
7. How much does it cost to fix a P0694 code on a Buick?
The repair cost can range from $50 to $300, depending on whether the issue is a simple relay replacement or a more complex fan motor repair.
8. Can a bad thermostat cause the P0694 code on a Buick?
A bad thermostat is unlikely to cause this code directly, as P0694 specifically relates to the cooling fan's electrical circuit. However, it’s important to check the cooling system for overall functionality.
9. What tools are needed to troubleshoot the P0694 code?
You’ll need an OBDII scanner, a multimeter, and possibly a wiring diagram for your Buick's cooling fan circuit to diagnose the issue.
10. Does the P0694 code always mean the cooling fan motor is bad?
No, the P0694 code could also be caused by a faulty relay, damaged wiring, or a problem with the ECM, so proper diagnosis is necessary.
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