P0290 — Cylinder 10 Injector Circuit High
Drivable short-term, but fix now to avoid damage.
What P0290 means
This code means the engine computer detected high voltage or an open condition in the circuit that controls the fuel injector for cylinder 10. It usually points to an open circuit, a broken wire, a poor connector, or a failed injector. It's a fairly common electrical fault and is often fixable by repairing the wiring or replacing a single injector without major engine work.
Common symptoms
- Check engine light is on
- Rough idle or engine shaking
- Engine misfire or hesitation
- Loss of power or sluggish acceleration
- Hard starting or stalling
Common causes
- Open circuit or broken wire in the injector harness
- Corroded or loose injector connector
- Failed fuel injector for cylinder 10
- Poor ground or power supply to the injector
- Faulty engine control module (less common)
Typical repair cost
$150 – $500
Varies by vehicle and root cause.
Frequently asked questions
Can I keep driving with a P0290 code?
For short distances, usually yes, but it's not wise long term. A non-firing cylinder can damage the catalytic converter and lead to a bigger repair, so have it looked at soon.
How much does it cost to fix a P0290 code?
Expect roughly $150 to $500. A wiring or connector repair is on the low end, while replacing the cylinder 10 injector plus diagnosis costs more.
Is P0290 a serious code?
Yes, it's fairly serious because it can stop a cylinder from firing. The car may still run, but you risk converter damage and rough performance if you leave it.
What's the difference between P0290 and P0289?
P0290 means the circuit voltage is too high or open, while P0289 means it's too low or shorted. Both involve cylinder 10's injector, but the parts and wiring a technician inspects differ.