Error code
OBD2 P0261
OBD2P0261
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
Cylinder 1 Injector Circuit Low.
Severity
moderateCan drive, but performance issues may occur.
Summary
P0261 indicates a low voltage issue with the fuel injector circuit for cylinder 1 in the powertrain system.
Symptoms
- Engine knock
- Reduced engine performance, especially during acceleration
- Decreased fuel economy
Common Causes
- Faulty or dirty fuel injector
- Electrical malfunction (open circuit or short)
- Corroded or loose electrical connectors
- Fault in the Fuel Injector Control Module (FICM)
Diagnosis
- Inspect and clean electrical connections to fuel injector
- Check for voltage at the fuel injector using a voltmeter
- Listen for clicking sound from the fuel injector while engine is running
Fixes
- Replace or clean the faulty fuel injector
FAQ
What causes P0261?
Common causes include electrical malfunctions, dirty or faulty fuel injectors, and issues with connectors or wiring.
Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
More OBD2 codes
- P0200Injector Circuit/Open
- P0201Injector Circuit/Open - Cylinder 1
- P0202Injector Circuit/Open - Cylinder 2
- P0203Injector Circuit/Open - Cylinder 3
- P0204Injector Circuit/Open - Cylinder 4
- P0205Injector Circuit/Open - Cylinder 5
- P0206Injector Circuit/Open - Cylinder 6
- P0207Injector Circuit/Open - Cylinder 7
- P0208Injector Circuit/Open - Cylinder 8
- P0209Injector Circuit/Open - Cylinder 9
- P0210Injector Circuit/Open - Cylinder 10
- P0211Injector Circuit/Open - Cylinder 11