P1934 Mercury Code - Fuel Additive Pump Control Circuit High
Quick Answer
The P1934 diagnostic trouble code for Mercury vehicles indicates a problem with the Fuel Additive Pump Control Circuit being detected as high. Common causes include Malfunctioning fuel additive pump, Wiring issues in the control circuit, Faulty sensor related to the fuel additive pump. 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
- P1934 Mercury indicates Fuel Additive Pump Control Circuit High.
- Common causes
- Common causes include Malfunctioning fuel additive pump, Wiring issues in the control circuit, Faulty sensor related to the fuel additive pump.
- 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.
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Code P1934 Mercury Description
The P1934 diagnostic trouble code for Mercury vehicles indicates a problem with the Fuel Additive Pump Control Circuit being detected as high. This code specifically relates to the control circuit of the fuel additive pump, which is responsible for injecting fuel additives into the fuel system. The fuel additive pump is crucial for maintaining the proper functioning of the vehicle's emissions system and improving fuel efficiency.
Common Causes of P1934 Mercury
- Malfunctioning fuel additive pump
- Wiring issues in the control circuit
- Faulty sensor related to the fuel additive pump
- ECM malfunction
- Corrosion or damage to electrical connections
Symptoms of P1934 Mercury
- Check Engine Light is illuminated
- Decreased fuel efficiency
- Rough idling or stalling
- Engine misfires
- Reduced acceleration
How to Fix P1934 Mercury
- Diagnose the source of the issue by performing a thorough inspection of the fuel additive pump, control circuit, wiring, and sensors.
- Test the fuel additive pump and control circuit for proper functioning using a multimeter.
- Replace any faulty components such as the fuel additive pump, sensor, or wiring as needed.
- Clear the trouble code from the ECM memory and test drive the vehicle to ensure the issue has been resolved.
- If the problem persists, further diagnostics may be required to pinpoint the exact cause of the high voltage reading.
Cost to Fix P1934 Mercury
The typical repair costs for addressing the P1934 code on a Mercury vehicle can range from $200 to $500, depending on the extent of the issue and the cost of replacement parts. This estimate includes the cost of the fuel additive pump, sensors, wiring, and labor. It's important to note that prices can vary based on the location of the repair shop, the vehicle's make and model, and the specific components that need to be replaced. Diagnostic time and labor rates can vary, with most shops charging between $80 and $150 per hour for labor. It's recommended to obtain quotes from multiple repair shops to get a more accurate estimate for the repair.
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