P0642 Ford Code - Sensor Reference Voltage 'A' Circuit Low
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
- P0642 Ford indicates Sensor Reference Voltage 'A' Circuit Low.
- 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 P0642 Ford Description
What are the Possible Causes of the DTC P0642 Ford?
- 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 P0642 Ford?
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 P0642 Ford 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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Information for Specific Ford Models
- P0642 2006 Ford Fusion — Sensor Reference Voltage 'A' Circuit Low
- P0642 2007 Ford Fusion — Sensor Reference Voltage 'A' Circuit Low
- P0642 2008 Ford Fusion — Sensor Reference Voltage 'A' Circuit Low
- P0642 2009 Ford Fusion — Sensor Reference Voltage 'A' Circuit Low
- P0642 2010 Ford Fusion — Sensor Reference Voltage 'A' Circuit Low
- P0642 2011 Ford Fusion — Sensor Reference Voltage 'A' Circuit Low
- P0642 2012 Ford Fusion — Sensor Reference Voltage 'A' Circuit Low
Frequently Asked Questions about P0642 Ford Code
1. What are the common symptoms of OBDII code P0642 in a Ford vehicle?
- Common symptoms include engine misfires, rough idling, poor acceleration, and potential stalling.
2. What does the OBDII code P0642 Ford mean?
- The code indicates a malfunction in the Sensor Reference Voltage 'A' Circuit, specifically that the voltage is too low.
3. What are the possible causes of OBDII code P0642 in a Ford?
- Common causes include a faulty sensor, damaged wiring or connectors, a failing PCM (Powertrain Control Module), or a short circuit.
4. How can I diagnose the Sensor Reference Voltage 'A' Circuit Low issue?
- To diagnose the problem, you may need to use a multimeter to check the voltage at the sensor, inspect the wiring for damage, and perform a thorough visual inspection.
5. What are the repair tips for fixing OBDII code P0642 in a Ford vehicle?
- Repair tips may include replacing the faulty sensor, repairing or replacing damaged wiring, ensuring proper connections, and resetting the trouble code with an OBDII scanner.
6. Can driving with OBDII code P0642 cause further damage to the vehicle?
- Continuing to drive with this code may lead to poor engine performance, reduced fuel efficiency, and potential damage to other components over time if left unresolved.
7. How much does it typically cost to repair OBDII code P0642 in a Ford?
- The cost of repair can vary depending on the exact cause of the issue, but it may involve parts and labor costs ranging from $100 to $300 or more.
8. Can I clear the OBDII code P0642 in a Ford without fixing the underlying issue?
- While you can clear the code temporarily, it is recommended to address the root cause to prevent recurring issues and ensure optimal vehicle performance.
9. Is OBDII code P0642 a common problem in Ford vehicles?
- Yes, Sensor Reference Voltage 'A' Circuit Low issues leading to code P0642 are relatively common in Ford vehicles, particularly in older models or those with high mileage.
10. How urgent is it to address OBDII code P0642 in a Ford vehicle?
- It is advisable to address the issue promptly to prevent further complications and ensure the proper functioning of the vehicle's sensors and engine control systems.
Discuss the causes and fixes for P0642 Ford OBDII Code
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My car hyindai sonata this is out the cidep0642 i change already ECM AND TROTTOLE BODY STILL NO ACCELARETION JUST ONLY 2500 RPM. NOT UP NOT DOWN pls help me what i do to my car.
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