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P0503 is a diagnostic trouble code (DTC) for "Vehicle Speed Sensor Intermittent/Erratic/High". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $70.00. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $30.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.
Vehicle Speed Sensor Intermittent/Erratic/High
The P0503 code indicates that the Engine Control Module (ECM) has detected an inconsistent signal voltage from the vehicle speed sensor.
Makes sure that the correct wheels and tires are installed
Locates the vehicle speed sensor then checks the connectors and the wiring in the circuit
If all is well so far:
In the unlikely event that the issue has not been found yet:
If any issues were found during the diagnosis of this issue, the parts would be replaced at the customer’s request.
A common mistake that could be made when diagnosing the P0503 trouble code would be overlooking the obvious. Checking the wheels and tires for correct size is the first thing that should be done considering that it is a visual check and requires no tools other than your eyes.
The P0503 trouble code is not too serious. This code only affects the performance of the vehicle’s speedometer. The only issue that may occur while having a P0503 code would be a speeding ticket.
If a P0503 trouble code is stored in your vehicle, it would be wise to drive slightly slower than the rest of traffic to ensure that you are not speeding until the issue has been resolved.
YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.