P0202 — Injector Circuit Malfunction - Cylinder 1
Drivable short-term, but fix now to avoid damage.
What P0202 means
This code means the engine computer has found an electrical problem in the injector circuit for cylinder 1 specifically. It usually points to a damaged wire, a loose connector, or a failing injector on that cylinder. It's commonly fixable by repairing the wiring or replacing the one affected injector rather than major engine work.
Common symptoms
- Check engine light is on
- Rough idle or engine shaking
- Misfire felt from cylinder 1
- Hesitation or loss of power when accelerating
- Reduced fuel economy
Common causes
- Faulty or clogged cylinder 1 injector
- Damaged or chafed wiring to the injector
- Loose or corroded injector connector
- Open or short in the cylinder 1 control circuit
- Failing injector driver in the engine computer
Typical repair cost
$150 – $500
Varies by vehicle and root cause.
Frequently asked questions
Can I keep driving with a P0202 code?
For short trips, usually yes, but you shouldn't rely on it. If cylinder 1 is misfiring, driving for long can damage your catalytic converter, so get it diagnosed quickly.
How much does it cost to fix a P0202 code?
A wiring or connector repair might cost around $150 to $250. Replacing the cylinder 1 injector typically runs $300 to $500 including parts and labor, depending on your vehicle.
Is a P0202 code serious?
It can be. A faulty injector circuit on cylinder 1 often causes a misfire, which wastes fuel and can harm the catalytic converter over time. It's worth addressing soon.
Which cylinder does P0202 refer to?
P0202 points to the injector circuit for cylinder 1. The exact location of cylinder 1 varies by engine, so a repair manual or technician can show you where it sits on your specific vehicle.