P146A Code - EVAP Purge Pump Speed Too High
Quick Answer
Purge capacity is being reduced by technologies that improve fuel economy. Common causes include Faulty Evaporative Emission Purge Pump, Evaporative Emission Purge Pump harness is open or shorted, Evaporative Emission Purge 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
- P146A indicates EVAP Purge Pump Speed Too High.
- Common causes
- Common causes include Faulty Evaporative Emission Purge Pump, Evaporative Emission Purge Pump harness is open or shorted, Evaporative Emission Purge 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 P146A Description
What are the Possible Causes of the DTC P146A?
- Faulty Evaporative Emission Purge Pump
- Evaporative Emission Purge Pump harness is open or shorted
- Evaporative Emission Purge Pump circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P146A?
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 P146A 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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Information for Specific Makes
- P146A Buick — EVAP Purge Pump Speed Too High
- P146A Cadillac — EVAP Purge Pump Speed Too High
- P146A Chevrolet — EVAP Purge Pump Speed Too High
- P146A GMC — EVAP Purge Pump Speed Too High
Frequently Asked Questions about P146A Code
1. What does the OBDII code P146A mean?
P146A indicates that the EVAP purge pump is operating at a speed that is higher than expected, which may suggest a malfunction in the EVAP system.
2. What are the common symptoms of a P146A code?
Symptoms may include an illuminated check engine light, a potential fuel smell near the vehicle, and in some cases, reduced fuel efficiency or difficulty starting.
3. What causes the P146A code to trigger?
Common causes include a faulty EVAP purge pump, a damaged or leaking purge valve, vacuum leaks in the EVAP system, or electrical issues such as wiring or connector problems.
4. Can a loose gas cap cause the P146A code?
While a loose gas cap can cause EVAP system-related codes, it is unlikely to directly cause P146A, which is specific to the purge pump speed being too high.
5. How is the P146A code diagnosed?
A technician will typically inspect the EVAP purge pump and related components, check for vacuum leaks, test the electrical connections, and use a scan tool to monitor EVAP system operation.
6. Is it safe to drive with a P146A code?
Driving with a P146A code may be safe in the short term, but it can lead to increased emissions and potential damage to EVAP system components if not addressed.
7. How can I fix the P146A code?
Repairs may involve replacing the EVAP purge pump, repairing vacuum leaks, fixing damaged wiring, or replacing the purge valve if it’s malfunctioning.
8. What tools are needed to repair a P146A code?
Common tools include a diagnostic scan tool, a multimeter for testing electrical connections, and potentially a smoke machine to detect vacuum leaks.
9. Will clearing the P146A code with a scan tool fix the issue?
Clearing the code may temporarily turn off the check engine light, but the underlying issue must be resolved to prevent the code from returning.
10. How much does it cost to repair a P146A code?
Repair costs vary depending on the issue, but replacing an EVAP purge pump typically ranges from $150 to $400, including parts and labor.
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