P1291 Ford Code - Injector High Side Short To Ground Or Battery Voltage Bank 1
Quick Answer
The Powertrain Control Module (PCM) monitors the output of the fuel injector circuits and sets a Diagnostic Trouble Code (DTC) when it detects the output is not within a calibrated limit. Common causes include Faulty Fuel Injector, Fuel Injector harness is open or shorted, Fuel Injector 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
- P1291 Ford indicates Injector High Side Short To Ground Or Battery Voltage Bank 1.
- Common causes
- Common causes include Faulty Fuel Injector, Fuel Injector harness is open or shorted, Fuel Injector 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 P1291 Ford Description
What are the Possible Causes of the DTC P1291 Ford?
- Faulty Fuel Injector
- Fuel Injector harness is open or shorted
- Fuel Injector circuit poor electrical connection
How to Fix the DTC P1291 Ford?
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.
Code Tech Notes
2011-2012 Ford F-Super Duty
2011-2012 Ford F-Super Duty Factory Service Bulletin OBDII Code P1291
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1291 Ford 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.
Need more information about the P1291 Ford code?
Need more information on how to fix the P1291 Ford code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P1291 Ford code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P1291 Ford Code
1. What are the common symptoms of OBDII code P1291 on a Ford vehicle?
The common symptoms of code P1291 include engine misfires, rough idling, poor acceleration, and illuminated Check Engine Light.
2. What does the OBDII code P1291 on a Ford indicate?
OBDII code P1291 indicates an injector high side short to ground or battery voltage issue in Bank 1 of the engine.
3. What are the potential causes of OBDII code P1291 in a Ford?
Potential causes of code P1291 include a faulty injector, damaged wiring or connectors, issues with the fuel injector driver module, or a short to ground or battery voltage in the injector circuit.
4. How can I diagnose the OBDII code P1291 in my Ford vehicle?
Diagnosing code P1291 involves inspecting the injector and its wiring for any visible damage, testing the fuel injector driver module, and using a multimeter to check for shorts to ground or battery voltage in the circuit.
5. Is it safe to drive with OBDII code P1291 present in a Ford?
It is not recommended to drive with code P1291 present, as it can lead to engine performance issues and potential damage to the fuel injector or other components.
6. How can I repair OBDII code P1291 on my Ford?
Repairing code P1291 may involve replacing a faulty injector, repairing damaged wiring or connectors, replacing the fuel injector driver module, or addressing any shorts in the injector circuit.
7. Can a DIY enthusiast fix OBDII code P1291 on a Ford at home?
While some basic diagnostic steps can be performed at home, fixing code P1291 may require specialized tools and knowledge. It is recommended to consult a professional mechanic for proper diagnosis and repair.
8. How much does it cost to repair OBDII code P1291 on a Ford?
The cost of repairing code P1291 can vary depending on the cause of the issue, the parts needed for repair, and labor costs. It is advisable to get a few quotes from reputable repair shops.
9. Will resetting the OBDII code P1291 on a Ford make it go away permanently?
Resetting the code may temporarily turn off the Check Engine Light, but if the underlying issue causing P1291 is not addressed, the code is likely to return.
10. Can OBDII code P1291 on a Ford be prevented?
Regular maintenance, such as checking and replacing fuel injectors as needed, inspecting wiring for damage, and keeping the vehicle well-maintained, can help prevent issues that may trigger code P1291.
Discuss the causes and fixes for P1291 Ford OBDII Code
-
Well I deleted and tuned my 2011 6.7 about 5 months ago it started acting funny by bucking in-between gears then went into limp mode i cleared the code on the ezlink programmer went to throttle up and it went into limp mode again so I cleared it once Moreland it was fine and I drove on home. But today just in accelerating to take of from a stop sign it did it continuously and a code popped up on my DTC P1291 I LOOKED IT UP IT SAID SOMETHING ABOUT MY GND OR VBATT ON MANK 1 CANT FIGURE THIS OUT NEED SOME INDIGHT
-
You may have a shorted fuel injector cause by fuel contaminated. We have updated the information and included a link to a Factory Service Bulletin. See "Tech Notes" above.
Tech Notes: https://www.autocodes.com/p...
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
