OBD Guide
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P15A1

Fuel Economy Mode Switch Performance

P15A1 is an OBD-II diagnostic trouble code meaning: Fuel Economy Mode Switch Performance. Common causes: fuel economy mode switch malfunction, open or short circuit in switch circuit. Estimated repair cost: $17–56.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$17–56 (est.)

Symptoms

  • Check Engine Light Is On
  • No response to switching fuel economy mode
  • Reduced acceleration dynamics
  • Increased fuel consumption
  • Limitation of available engine operating modes

Causes

  • Fuel economy mode switch malfunction
  • Open or short circuit in switch circuit
  • Wiring Harness Problems
  • ECU malfunction
  • Contact corrosion

How to Fix

  1. Check the status of the fuel economy mode switch
  2. Check the integrity of the circuit and connection
  3. Scan the system for other errors
  4. Replace switch if necessary
  5. Reset the error and check the system operation

Related codes

P15A0P15A2P15A3

FAQ

What does the P15A1 code mean?

P15A1 is an OBD-II diagnostic trouble code that indicates: Fuel Economy Mode Switch Performance

What causes a P15A1 error code?

The most common causes of P15A1 include: Fuel economy mode switch malfunction; Open or short circuit in switch circuit; Wiring Harness Problems; ECU malfunction.

How do I fix a P15A1 diagnostic trouble code?

To fix P15A1: Check the status of the fuel economy mode switch. Check the integrity of the circuit and connection. Scan the system for other errors. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P15A1?

Yes, but get it checked soon

How much does it cost to fix P15A1?

The estimated repair cost for P15A1 is $17–56. Actual cost depends on your vehicle, location, and labor rates.

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