P1277 Ford Code - Cylinder #7 High To Low Side Open
Quick Answer
The Injector Driver Module (IDM) is capable of detecting individual injectors open and shorts to either ground or power while the engine is running. Common causes include Faulty Fuel Injector, Faulty Injector Driver Module (IDM), Fuel Injector harness is open or shorted. 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
- P1277 Ford indicates Cylinder #7 High To Low Side Open.
- Common causes
- Common causes include Faulty Fuel Injector, Faulty Injector Driver Module (IDM), Fuel Injector harness is open or shorted.
- 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 P1277 Ford Description
What are the Possible Causes of the DTC P1277 Ford?
- Faulty Fuel Injector
- Faulty Injector Driver Module (IDM)
- Fuel Injector harness is open or shorted
- Fuel Injector circuit poor electrical connection
How to Fix the DTC P1277 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
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1277 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.
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Frequently Asked Questions about P1277 Ford Code
1. What does the OBDII code P1277 mean on a Ford vehicle?
P1277 indicates that there is an open circuit issue in the high-to-low side of the injector circuit for cylinder #7, meaning the injector is not operating as intended.
2. What are the common symptoms of code P1277 on a Ford?
Symptoms may include engine misfires, rough idling, poor acceleration, reduced fuel efficiency, and an illuminated check engine light.
3. What causes the P1277 code to appear on a Ford?
Common causes include a faulty fuel injector, damaged wiring or connectors in the injector circuit, or a failed powertrain control module (PCM).
4. Can I drive my Ford with a P1277 code?
Driving with a P1277 code is not recommended as it can lead to poor engine performance, increased emissions, and potential damage to other components over time.
5. How do I diagnose the P1277 code on a Ford?
Start by inspecting the wiring and connectors for cylinder #7's injector for damage or corrosion. Use a multimeter to test for continuity and check the resistance of the injector.
6. How do I fix the P1277 code on a Ford?
Repairs may involve replacing the faulty injector, repairing or replacing damaged wiring or connectors, or reprogramming or replacing the PCM if necessary.
7. How much does it cost to fix the P1277 code on a Ford?
Repair costs can vary depending on the issue, ranging from $50-$300 for injector or wiring repairs to $500-$1,200 if the PCM needs replacement.
8. Can a dirty fuel injector cause the P1277 code on a Ford?
A dirty injector is unlikely to cause this specific code, as P1277 is related to an electrical circuit fault rather than a mechanical blockage.
9. Will clearing the code fix the P1277 issue on a Ford?
Clearing the code will turn off the check engine light temporarily, but it will return if the underlying issue is not resolved.
10. Can a bad PCM cause the P1277 code on a Ford?
Yes, a failed or malfunctioning PCM can cause the P1277 code if it cannot properly control the injector circuit for cylinder #7.
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