Guide To P0503 OBD Error Code Solutions

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The error code P0503 can be identified as Vehicle Speed Sensor Intermittent/Erratic/High. This diagnostic fault code is a generic powertrain code, which means that it would apply to the OBD-II equipped vehicles. The specific repair steps can vary as it depends upon the vehicle make and model.

The P0503 trouble code would start indicating that the engine control module has detected an inconsistent signal voltage from the vehicle speed sensor.

What causes this problem with the Vehicle Speed Sensor “A” Intermittent?

• Faults in the engine control module
• Flaws in the vehicle speed sensor
• The size of wheels or tires might not be correct
• Defective instrument cluster
• Defaults in the wiring or connectors in the vehicle speed sensor circuit
• Multiple faulty wheel speed sensors/ hub bearings
• There can be broken ABS tone rings

1. Powertrain Control Module - Did your mechanic just found out that there is some fault in the Powertrain Control Module? Buy top notch Powertrain Control Module from us at economical prices.
2. ABS System Parts - A broken ABS System Parts can cause a lot of issues. It would be nice if you get it replaced on time.
3. Engine Wiring Harness - Everything is fine with the engine control module and still OBD code P0503 flashing? Then there is definitely some fault with the Engine Wiring Harness. Get it checked and replace if needed.
4. Speedometer - Speedometer is an important car part which should never be neglected. May be there is some fault in it due to which P0503 code may start flashing.
5. Electronic Control Unit - A faulty Electronic Control Unit can be troublesome. You can always rely on us as we have best auto parts for our customers.
6. Engine Control Module - P0503 code does not really end up spoiling your Electronic Control Unit, but it might also accompany few Engine Control Module issues. We have best Engine Control Module with us.

We care for our customers and that’s why we can totally understand your problem. That’s the reason why we have listed out some major symptoms behind the flashing up of OBD Code P0503. They are mentioned here as follows:

Common Symptoms

• The speedometer might be inaccurate
• Flashing up of the check engine light
• Speedometer needle may bounce up and down

If you wish to correct this fault code, then you have to follow certain steps. Correcting a problem needs your careful attention. Here are some ways with the help of which you will be able to correct the OBD Code P0503:

• You must replace the vehicle speed sensor
• it the correct size wheels and tires to the vehicle
• Repair or replace the wiring or connectors in the vehicle speed sensor circuit
• Make sure to replace one or more-wheel speed sensors
• Replacing a CV axle due to a faulty tone ring
• If there are some faults in the engine control module, then it should be replaced
• Restore the instrument cluster
• Defective hub bearing should be replaced properly

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Do you wish to diagnose P0503 error code easily? Here are some steps which you should follow in order to diagnose this fault code:

• Test the vehicle speed sensor for faults using the manufacturer’s recommended procedure
• Inspect the wheel speed sensors
• Carefully check the tone rings
• You must make sure that the correct wheels and tires are installed
• The vehicle speed sensor should be located properly and then check the connectors and the wiring in the circuit
• All the wheels and tires should be inspected properly
• Replace the engine control module if found faulty
• If any issues were found during the diagnosis of this issue, then the parts should be replaced

Common Mistakes When Diagnosing The P0503 Code

• Most of the times mechanic make a big mistake of overlooking the obvious issues while diagnosing the P0503 trouble code
• Make sure to check the wheels and tires for correct size as it would be a visual check and there would be no requirement of any tools