P0652 Isuzu Code - 5 Volt Reference 2 Circuit Low Voltage
Quick Answer
The control module has 2 internal 5-volt reference buses called "5-volt reference 1" and"5-volt reference 2". Common causes include Faulty Engine Control Module (ECM), ECM harness is open or shorted, ECM 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 Isuzu indicates 5 Volt Reference 2 Circuit Low Voltage.
- Common causes
- Common causes include Faulty Engine Control Module (ECM), ECM harness is open or shorted, ECM 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 Isuzu Description
What are the Possible Causes of the DTC P0652 Isuzu?
- Faulty Engine Control Module (ECM)
- ECM harness is open or shorted
- ECM circuit poor electrical connection
- Shorted sensor on 5 volt circuit
How to Fix the DTC P0652 Isuzu?
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 P0652 Isuzu 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 P0652 Isuzu Code
What does the OBDII code P0652 mean on an Isuzu?
P0652 indicates a low voltage issue in the 5 Volt Reference 2 Circuit, which supplies power to various engine sensors.
What are the common symptoms of code P0652 in an Isuzu?
Symptoms may include poor engine performance, stalling, hard starting, reduced fuel efficiency, and an illuminated check engine light.
What causes the P0652 code to appear in my Isuzu?
Common causes include a short or open circuit in the 5-volt reference wiring, a faulty sensor, a damaged ECM, or corroded or loose electrical connections.
Can a faulty sensor trigger the P0652 code in an Isuzu?
Yes, a malfunctioning sensor that relies on the 5-volt reference circuit can cause this code if it creates a short or fails to operate correctly.
How do I diagnose the P0652 code on my Isuzu?
Start by inspecting the wiring and connectors for damage or corrosion. Use a multimeter to check the 5-volt reference circuit voltage and test related sensors for faults.
Is it safe to drive with a P0652 code on my Isuzu?
Driving with this code is not recommended as it can lead to poor engine performance or stalling, which could be dangerous in certain situations.
What sensors rely on the 5 Volt Reference 2 Circuit in an Isuzu?
Sensors that may depend on this circuit include the throttle position sensor, manifold absolute pressure sensor, and other engine management sensors.
Can a damaged ECM cause the P0652 code?
Yes, a malfunctioning engine control module (ECM) can result in incorrect voltage regulation and trigger this code.
How do I fix the P0652 code on my Isuzu?
Repairs may involve fixing damaged wiring, replacing a faulty sensor, cleaning corroded connectors, or, in rare cases, replacing the ECM.
Will clearing the code fix the P0652 issue on my Isuzu?
Clearing the code may turn off the check engine light temporarily, but the underlying problem must be resolved to prevent the code from returning.
Discuss the causes and fixes for P0652 Isuzu OBDII Code
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