P0652 Cadillac Code - 5 Volt Reference 2 Circuit Low Voltage
Quick Answer
The Engine Control Module (ECM) has four (4) internal 5 Volt reference circuits (Some models have two (2) internal 5 Volt reference circuits). Common causes include Faulty Sensor on 5 Volt circuit, Sensor on 5 Volt circuit harness is open or shorted, Sensor on 5 Volt 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
- P0652 Cadillac indicates 5 Volt Reference 2 Circuit Low Voltage.
- Common causes
- Common causes include Faulty Sensor on 5 Volt circuit, Sensor on 5 Volt circuit harness is open or shorted, Sensor on 5 Volt 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 P0652 Cadillac Description
What are the Possible Causes of the DTC P0652 Cadillac?
- Faulty Sensor on 5 Volt circuit
- Sensor on 5 Volt circuit harness is open or shorted
- Sensor on 5 Volt circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P0652 Cadillac?
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.
Code Tech Notes
The 5 Volt reference 2 circuit provides 5 Volt to the following sensors: (Some models may have different sensors, please consult the factory service manual for the list of sensors for your model and year)
- Brake pedal position sensor
- Crankshaft position sensor
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0652 Cadillac 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.
Need more information about the P0652 Cadillac code?
Need more information on how to fix the P0652 Cadillac code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0652 Cadillac code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P0652 Cadillac Code
1. What does the OBDII code P0652 mean on a Cadillac?
P0652 indicates a low voltage issue in the 5 Volt Reference 2 Circuit, which provides power to various sensors in the vehicle.
2. What are the symptoms of the P0652 code in a Cadillac?
Symptoms may include poor engine performance, stalling, a no-start condition, illuminated check engine light, and erratic behavior of sensors.
3. What causes the P0652 code on a Cadillac?
Common causes include a shorted sensor, damaged wiring, a faulty powertrain control module (PCM), or corrosion in the 5-volt reference circuit.
4. How do I diagnose the P0652 code on a Cadillac?
Start by inspecting the wiring and connectors for damage, test the sensors connected to the 5-volt reference circuit, and use a multimeter to check for proper voltage.
5. Can I drive my Cadillac with the P0652 code?
It’s not recommended to drive with this code as it can lead to poor performance, unsafe driving conditions, or further damage to the engine or sensors.
6. How do I fix the P0652 code on a Cadillac?
Repairs may include replacing a shorted sensor, repairing damaged wiring, cleaning corroded connectors, or replacing the PCM if it is faulty.
7. Which sensors could be affected by the P0652 code on a Cadillac?
Sensors dependent on the 5 Volt Reference 2 Circuit could include the throttle position sensor, MAP sensor, and other critical engine sensors.
8. How much does it cost to repair the P0652 code on a Cadillac?
Repair costs vary but may range from $100 to $500 depending on whether a sensor, wiring, or PCM needs replacement.
9. Can a bad battery cause the P0652 code on a Cadillac?
While unlikely, a weak or failing battery can cause voltage-related issues that might trigger this code. It’s worth testing the battery as part of the diagnosis.
10. Will disconnecting the battery clear the P0652 code on a Cadillac?
Disconnecting the battery may temporarily clear the code, but the issue will return if the underlying cause isn’t addressed.
Discuss the causes and fixes for P0652 Cadillac OBDII Code
Code P0652 Cadillac comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
