P1652 Buick Code - Cooling Fan 2 Relay Control Circuit Conditions
Quick Answer
With the key on, the Powertrain Control Module (PCM) detects improper voltage level on ODM 'B' output 2 fault line circuit, all conditions met for 5-30 seconds (length of time to set varies by engine family) 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
- P1652 Buick indicates Cooling Fan 2 Relay Control Circuit Conditions.
- 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 P1652 Buick Description
What are the Possible Causes of the DTC P1652 Buick?
- Faulty Cooling Fan 2 Relay
- Cooling Fan 2 Relay harness is open or shorted
- Cooling Fan 2 Relay circuit poor electrical connection
How to Fix the DTC P1652 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 P1652 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 P1652 Buick Code
1. What does the OBDII code P1652 mean on a Buick?
P1652 indicates an issue with the Cooling Fan 2 Relay Control Circuit, which suggests a problem in the circuit responsible for controlling the secondary cooling fan.
2. What are the common symptoms of code P1652 in a Buick?
Symptoms include engine overheating, the secondary cooling fan not running, the cooling fan running constantly, or the check engine light being illuminated.
3. What can cause the P1652 code to appear in a Buick?
Common causes include a faulty cooling fan relay, damaged wiring or connectors in the relay circuit, a blown fuse, or a malfunctioning engine control module (ECM).
4. Can I still drive my Buick with the P1652 code active?
Driving with the P1652 code is not recommended, as it can lead to engine overheating and potential damage if the secondary cooling fan is not operating correctly.
5. How do I diagnose the P1652 code on my Buick?
Diagnosis involves checking the cooling fan relay, inspecting wiring and connectors for damage, testing the relay circuit for proper voltage, and verifying the functionality of the ECM.
6. How can I fix the P1652 code on my Buick?
Repairs may include replacing the cooling fan relay, repairing damaged wiring or connectors, replacing a blown fuse, or, in rare cases, reprogramming or replacing the ECM.
7. Where is the Cooling Fan 2 Relay located in a Buick?
The Cooling Fan 2 Relay is typically located in the engine bay fuse and relay box. Refer to your vehicle’s service manual for the exact location.
8. How much does it cost to fix the P1652 code on a Buick?
Repair costs can vary, but replacing a cooling fan relay typically costs $50–$150, while more extensive electrical repairs or ECM replacement can cost significantly more.
9. Can a bad thermostat cause the P1652 code in a Buick?
A bad thermostat is not a direct cause of the P1652 code, but it can contribute to overheating, which might highlight issues with the cooling fan circuit.
10. Will clearing the code fix the P1652 issue on my Buick?
Clearing the code may temporarily turn off the check engine light, but the underlying issue must be resolved to prevent the code from returning.
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