Engine-CodesGMC – P0803 GMC

P0803 GMC Code - Skip Shift Solenoid Control Circuit

Quick Answer

The P0803 GMC code specifically refers to the Skip Shift Solenoid Control Circuit in a GMC vehicle. Common causes include Faulty skip shift solenoid, Wiring or connector issues in the control circuit, Corrosion or damage to the electrical connections. 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
P0803 GMC indicates Skip Shift Solenoid Control Circuit.
Common causes
Common causes include Faulty skip shift solenoid, Wiring or connector issues in the control circuit, Corrosion or damage to the electrical connections.
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.
Table of contents Created and updated by William Orellana on Sep 11, 2024
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Code P0803 GMC Description

The P0803 GMC code specifically refers to the Skip Shift Solenoid Control Circuit in a GMC vehicle. This code indicates that there is a malfunction in the circuit responsible for controlling the skip shift solenoid. The skip shift solenoid is a component in the transmission system that helps improve fuel efficiency by skipping a gear during certain driving conditions, typically when accelerating from a stop. When this solenoid malfunctions, it can lead to issues with gear shifting, fuel economy, and overall vehicle performance.

OBDII Code P0803 GMC - Skip Shift Solenoid Control Circuit
P0803 GMC Code - Skip Shift Solenoid Control Circuit

Common Causes of P0803 GMC

  1. Faulty skip shift solenoid
  2. Wiring or connector issues in the control circuit
  3. Corrosion or damage to the electrical connections
  4. Engine control module (ECM) software issue
  5. Mechanical problem in the transmission

Symptoms of P0803 GMC

  1. Harsh or delayed shifting
  2. Poor acceleration
  3. Decreased fuel efficiency
  4. Limp mode activation
  5. Check Engine Light illuminated

How to Fix P0803 GMC

  1. Diagnose the exact cause of the P0803 code using a diagnostic scanner and multimeter to test the skip shift solenoid and control circuit.
  2. Inspect the wiring and connectors for any damage or corrosion, repairing or replacing as necessary.
  3. Replace the skip shift solenoid if it is found to be faulty.
  4. Clear the error code and test drive the vehicle to ensure the issue has been resolved.
  5. If the problem persists, further diagnostic testing may be needed to identify any underlying mechanical issues in the transmission.

Cost to Fix P0803 GMC

The cost of repairing a P0803 GMC code can vary depending on the specific cause of the issue and the labor rates in your area. Typically, replacing a skip shift solenoid and addressing any wiring issues can range from $200 to $500. However, additional costs may apply if there are more significant transmission problems that need to be addressed. It is recommended to consult with a professional mechanic to get a more accurate estimate based on your vehicle's make and model. Keep in mind that labor rates at auto repair shops can vary, so it's best to shop around for the best price.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

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