Engine-Codes - Generic - P0804

P0804 Code - 1-4 Upshift Skip Shift Lamp Control Circuit Malfunction

- Code Popularity: 10,876 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents
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What are the Possible Causes of the DTC P0804?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Skip Shift Lamp
  • Skip Shift Lamp harness is open or shorted
  • Skip Shift Lamp circuit poor electrical connection
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How to Fix the DTC P0804?

Check the 'Possible Causes' listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

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What is the Cost to Diagnose the Code?

Labor: 1.0

The cost to diagnose the P0804 code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

What Does the P0804 Code Mean?

An ignition voltage is supplied to the Skip Shift Lamp. The Powertrain Control Module (PCM) controls the lamp by grounding the control circuit via an internal switch called a driver. The driver supplies the ground for the component being controlled. Each driver has a fault line which the PCM monitors. When the PCM commands a component ON, the voltage of the control circuit should be low (near 0 volts).

P0804 Code - 1-4 Upshift Skip Shift Lamp Control Circuit Malfunction

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Code P0804 Information for Specific Makes

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