P1277
Cylinder #7 High To Low Side Open
P1277 is an OBD-II diagnostic trouble code meaning: Cylinder #7 High To Low Side Open. Common causes: broken wire in the injector/coil control circuit, malfunction of the ignition coil of the 7th cylinder. Estimated repair cost: $17–89.
Symptoms
- Misfire in cylinder 7
- Loss of engine power
- Increased fuel consumption
- Rough engine idling
- Check Engine Light Is On
Causes
- Broken wire in the injector/coil control circuit
- Malfunction of the ignition coil of the 7th cylinder
- Cylinder fuel injector problem
- Wiring harness damage
- Engine control unit malfunction
How to Fix
- Check the integrity of the wires to the 7th cylinder
- Test ignition coil resistance
- Check the operation of the fuel injector
- Inspect connectors and contacts for corrosion
- If necessary, replace faulty components
Related codes
Error P1277 by Vehicle Brand
FAQ
What does the P1277 code mean?
P1277 is an OBD-II diagnostic trouble code that indicates: Cylinder #7 High To Low Side Open
What causes a P1277 error code?
The most common causes of P1277 include: Broken wire in the injector/coil control circuit; Malfunction of the ignition coil of the 7th cylinder; Cylinder fuel injector problem; Wiring harness damage.
How do I fix a P1277 diagnostic trouble code?
To fix P1277: Check the integrity of the wires to the 7th cylinder. Test ignition coil resistance. Check the operation of the fuel injector. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1277?
Limited driving only, diagnose soon
How much does it cost to fix P1277?
The estimated repair cost for P1277 is $17–89. Actual cost depends on your vehicle, location, and labor rates.
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