P1934 Mazda Code - Fuel Additive Pump Control Circuit High
Quick Answer
The Fuel Additive Pump is a positive displacement pump (reciprocating pump) and, in response to commands from the fuel additive control unit, delivers a metered quantity of fuel additive to the injector on the top of the fuel tank via a short fuel pipe; the injector then injects the additive into the fuel tank. Common causes include Faulty Fuel Additive Level Pump, Fuel Additive Level Pump harness is open or shorted, Fuel Additive Level Pump circuit poor electrical connection. 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 Mazda indicates Fuel Additive Pump Control Circuit High.
- Common causes
- Common causes include Faulty Fuel Additive Level Pump, Fuel Additive Level Pump harness is open or shorted, Fuel Additive Level Pump circuit poor electrical connection.
- 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.
Code P1934 Mazda Description
The piezo sensor on the Fuel Additive Pump records the fill level of the fuel additive in the fuel additive tank and transmits this information to the fuel additive control unit.
Its other task is to determine any change in the viscosity of the fuel additive as a function of ambient temperatures; this may result in the metered quantity of fuel additive having to be corrected.
If the fill level of the fuel additive in the fuel additive tank falls below a certain limit, the engine system fault warning lamp in the instrument cluster will switch on.
If the fuel additive tank becomes empty, the Malfunction Indicator Lamp (MIL) will light up.
What are the Possible Causes of the DTC P1934 Mazda?
- Faulty Fuel Additive Level Pump
- Fuel Additive Level Pump harness is open or shorted
- Fuel Additive Level Pump circuit poor electrical connection
How to Fix the DTC P1934 Mazda?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1934 Mazda code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P1934 Mazda Code
1. What are common symptoms of OBDII code P1934 in a Mazda related to the Fuel Additive Pump Control Circuit High?
- Common symptoms include the check engine light illuminating, reduced engine performance, and potential issues with fuel efficiency.
2. What are the possible causes of OBDII code P1934 in a Mazda indicating a Fuel Additive Pump Control Circuit High?
- Possible causes include a faulty fuel additive pump, damaged wiring or connectors in the control circuit, or a malfunctioning fuel additive control module.
3. How can I diagnose the OBDII code P1934 in a Mazda related to the Fuel Additive Pump Control Circuit High?
- Diagnose the issue by performing a visual inspection of the wiring and connectors, testing the fuel additive pump, and using a scan tool to check for trouble codes.
4. Can I continue driving my Mazda with OBDII code P1934 indicating a Fuel Additive Pump Control Circuit High?
- It is not recommended to drive the vehicle with this code present, as it can lead to further damage and potentially affect engine performance.
5. How can I repair OBDII code P1934 in a Mazda associated with a Fuel Additive Pump Control Circuit High?
- Repair options include replacing the fuel additive pump, repairing or replacing damaged wiring or connectors, and resetting the trouble code with a scan tool after completing the repairs.
6. Are there any preventive maintenance tips to avoid OBDII code P1934 in a Mazda related to the Fuel Additive Pump Control Circuit High?
- Regularly inspecting the fuel additive system components, ensuring proper fuel quality, and addressing any fuel system issues promptly can help prevent this code from occurring.
7. Can a DIY enthusiast fix OBDII code P1934 in a Mazda indicating a Fuel Additive Pump Control Circuit High?
- Depending on the level of expertise, a DIY enthusiast may be able to diagnose and repair this issue, but it is recommended to consult a professional mechanic for accurate diagnosis and repair.
8. Will resetting the check engine light resolve OBDII code P1934 in a Mazda associated with a Fuel Additive Pump Control Circuit High?
- Resetting the check engine light without addressing the underlying issue will not resolve the problem. It is important to diagnose and repair the root cause of the code.
9. How much does it typically cost to repair OBDII code P1934 in a Mazda related to the Fuel Additive Pump Control Circuit High?
- The cost of repairs can vary depending on the specific issue, but it may involve replacement parts, labor costs, and diagnostic fees. It is recommended to obtain quotes from different mechanics for an accurate estimate.
10. Is it safe to clear the OBDII code P1934 in a Mazda indicating a Fuel Additive Pump Control Circuit High without fixing the problem?
- While clearing the code may temporarily turn off the check engine light, the underlying issue will persist and could potentially lead to more serious problems. It is best to address the root cause of the code to ensure the vehicle operates properly.
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