P0253
Stop drivingYour engine's computer detected a low voltage signal in the control circuit for the 'A' fuel injection pump. This means the high-pressure fuel pump isn't getting the correct electrical signal to operate properly.
Code P0253 means your fuel injection pump's control circuit has low voltage, indicating a problem with its operation. Common causes: Faulty fuel injection pump (60%), wiring issues (30%), or a bad fuel pressure sensor (5%). Drivability: No, stop driving immediately. Repair cost: $500-$2000 DIY, $1000-$4500 professional.
Can I Drive With P0253?
No, stop driving
Immediate repair needed
Stop driving immediately if: Engine stalls, significant power loss, check engine light is flashing, or any unusual noises from the engine.
Symptoms of P0253
- 1Engine will not start or is very difficult to start
- 2Engine stalls unexpectedly
- 3Significant loss of engine power
- 4Engine runs very rough or misfires
- 5Black smoke from the exhaust (diesel engines)
- 6Engine enters 'limp mode'
Common Causes of P0253
Parts most likely causing this code, ranked by probability
The internal control solenoid or actuator within the high-pressure fuel pump has failed, or the pump itself is drawing too much current, causing the control module to detect a low voltage signal.
60% of P0253 cases are fixed by replacing this part
A damaged wire, corroded connector, or poor ground connection in the fuel injection pump's control circuit can directly cause a low voltage signal to be reported.
30% of P0253 cases are fixed by repairing wiring or connectors
A faulty fuel pressure sensor or regulator can send incorrect feedback to the engine computer, leading it to misinterpret the fuel injection pump's control circuit status as 'low'.
5% of P0253 cases are fixed by replacing this part
The engine's computer itself could have a faulty driver circuit responsible for controlling the fuel injection pump, though this is a rare cause.
5% of P0253 cases are fixed by replacing the PCM
Check These First (Before Buying Parts)
- Visually inspect the wiring harness and electrical connector to the high-pressure fuel pump for any obvious damage, fraying, or corrosion. Ensure the connector is securely seated.
- Check your vehicle's battery voltage. A weak battery or charging system can sometimes cause low voltage codes, though less common for P0253.
How to Diagnose P0253
- 1Visually inspect the wiring harness and connectors leading to the high-pressure fuel pump for any signs of damage, corrosion, or loose connections.
- 2Use a scan tool to check for other related fuel system codes and monitor live data, specifically fuel pressure readings and fuel pump control signals.
- 3Perform a voltage drop test on the fuel injection pump's control circuit to identify any excessive resistance.
- 4Test the resistance and continuity of the fuel injection pump's internal solenoid or actuator, if accessible and specified by the manufacturer.
- 5If all wiring and sensor inputs are confirmed good, test the high-pressure fuel pump itself according to manufacturer specifications.
P0253 on Popular Vehicles
Ford F-150
2018-2024On 3.0L Power Stroke diesel engines, P0253 can indicate a failure of the high-pressure fuel pump (HPFP) or issues with its electrical connector and wiring. Fuel quality and contamination are critical for HPFP longevity.
75% fixed by addressing HPFP or wiring
Chevrolet Silverado
2007-2024For Duramax diesel engines, P0253 often relates to the CP4 high-pressure fuel pump. These pumps are known to fail, sometimes sending metal debris through the fuel system. Thorough inspection of the fuel system for contamination is essential.
70% fixed by replacing HPFP
Ram Cummins
2007-2024On 6.7L Cummins diesel engines, P0253 can point to issues with the CP3 or CP4 high-pressure fuel pump, or its associated wiring harness. Fuel pressure sensor issues can also sometimes trigger this code if they cause incorrect pump control.
70% fixed by addressing HPFP or wiring
Frequently Asked Questions
What does P0253 mean?
P0253 indicates that your vehicle's engine computer has detected a low voltage condition in the control circuit for the 'A' fuel injection pump. This means the high-pressure fuel pump is not receiving or responding to the proper electrical signals to function correctly.
Can I drive with P0253?
No, stop driving. This code points to a critical issue with your fuel system's high-pressure pump. Driving with P0253 can lead to sudden engine stalling, severe engine damage, or leave you stranded.
Will P0253 clear itself?
No, P0253 will not clear itself. This code signifies a hard fault in a critical system. The underlying issue must be diagnosed and repaired before the code will clear, either automatically after several drive cycles or by using a scan tool.
How do I fix P0253 myself?
Fixing P0253 yourself involves inspecting the wiring and connectors to the high-pressure fuel pump for damage. If the wiring is good, you'll need a multimeter and potentially a scan tool to test the fuel pump's control circuit and the pump itself. Replacing the high-pressure fuel pump is a complex job that often requires specialized tools and knowledge.
How much does it cost to fix P0253?
The cost to fix P0253 varies significantly. If it's a wiring issue, DIY costs are $50-$200, and a shop will charge $150-$400. If the high-pressure fuel pump needs replacement, parts alone can be $500-$2000, with professional installation pushing the total to $1000-$4500 or more, especially for diesel engines.
P0253 keeps coming back - why?
If P0253 keeps returning, it means the root cause was not fully addressed. Common reasons for recurrence include: an intermittent wiring issue that wasn't fully repaired, a faulty fuel injection pump that was misdiagnosed, or a rare PCM issue that was overlooked. Ensure all related components and circuits are thoroughly tested.
Will P0253 fail emissions/smog test?
Yes, P0253 will cause your vehicle to fail an emissions or smog test. This code indicates a significant malfunction in the fuel system, which directly impacts engine performance and emissions. Your check engine light will be on, which is an automatic failure in most jurisdictions.
What's the difference between P0253 and P0251?
P0251 is a general code indicating a 'Fuel Injection Pump 'A' Malfunction', meaning there's a problem with the pump's overall operation. P0253 is more specific, indicating a 'Fuel Injection Pump 'A' Control Circuit Low' condition, pointing directly to an electrical issue with the pump's control circuit (low voltage).
P0253 on Ford F-150?
On Ford F-150s, especially those with diesel engines (like the 3.0L Power Stroke), P0253 often points to issues with the high-pressure fuel pump (HPFP) itself or its wiring. HPFP failures can be costly, and thorough diagnosis is crucial to avoid replacing expensive parts unnecessarily. Fuel contamination can also contribute to HPFP issues.
Questions to Ask Your Mechanic
Did you check the voltage and ground at the high-pressure fuel pump's control circuit connector?
Good answer: Yes, I confirmed proper voltage supply and ground integrity at the pump connector. The issue isn't with the external wiring.
What were the fuel pressure readings from the scan tool, both commanded and actual, when the code set?
Good answer: The actual fuel pressure was significantly lower than the commanded pressure, or the control circuit showed an abnormal duty cycle, indicating the pump wasn't responding correctly.
Did you inspect the fuel for any signs of contamination or debris?
Good answer: Yes, I checked the fuel filter and a fuel sample. There were no signs of water or metal particles, so fuel quality isn't the primary suspect.
Repair Cost Estimate
DIY Repair
Parts only
$50-$2000
Shop Repair
Parts + labor
$150-$4500
Save $100-$2500 by doing it yourself (depending on the part)
Difficulty
advanced
Time
3-8 hours
Professional recommended - This code involves a critical and complex part of your engine's fuel system. Diagnosis requires specialized tools and knowledge, and replacement of the high-pressure fuel pump is often difficult and costly if done incorrectly.
Cost of Waiting
Ignoring P0253 is extremely risky. Your engine can stall without warning, creating a dangerous situation. Continued operation with a failing high-pressure fuel pump can lead to severe engine damage, including injector failure, piston damage, and potentially total engine seizure. A $1000-$4500 fuel pump repair now prevents a $5,000-$10,000 engine replacement later.
While You're In There...
If you're working on the high-pressure fuel system, it's a good time to replace the fuel filter. A clogged filter can stress the pump and contribute to fuel delivery issues, and it's a low-cost maintenance item.
Inspect all accessible fuel lines and hoses for cracks, leaks, or signs of wear. Replacing any compromised lines while the system is open prevents future leaks and ensures proper fuel delivery.
Tools You'll Need
- OBD-II Scan Tool (with live data capability)
- Multimeter
- Wiring diagram for your vehicle
- Fuel pressure gauge (optional, but helpful)
- Specialized fuel line tools (for pump replacement)
- Torque wrench
- Basic hand tools (sockets, wrenches)
P0253 is a serious code, but it's a known issue. With proper diagnosis, the problem can be accurately identified and repaired, restoring your vehicle's reliable performance.
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Your Next Steps
Step 1: Perform a thorough visual inspection of the wiring and connectors to the high-pressure fuel pump. Look for any signs of damage, corrosion, or loose connections. Repair any issues found.
Step 2: If wiring is good, use an advanced OBD-II scan tool to monitor live fuel pressure data and the fuel injection pump's control circuit. Compare actual readings to commanded values. If there's a significant discrepancy, proceed to test the pump itself.
Step 3: If testing confirms the high-pressure fuel pump is faulty, you'll likely need to replace it. This is a complex repair, especially on diesel engines, and may require specialized tools. Consider professional help if you're not comfortable with advanced fuel system work.