P0203 on Suzuki Wagon R: Cylinder 3 Injector Circuit Malfunction

Short answer: P0203 means “Cylinder 3 Injector Circuit Malfunction”. The car’s computer has found a fault in the Engine system and turns on the Check engine light (MIL). First check: read the code and freeze-frame data with an OBD-II scanner.

Standard OBD-II code Same meaning on all cars (SAE J2012). Not checked against this car’s factory manual.

Code

P0203

System

Engine

Dashboard light

Check engine light (MIL)

Also sold as

Maruti Suzuki Wagon R, Suzuki Karimun Wagon R (Indonesia)

Applies to

Generic OBD-II meaning. Not every code is used by this car.

Confidence

medium (generic OBD-II definition, not checked against the factory manual for this car)

Source

obd-codes.com

Symptoms and when it is set

1. Check engine light on

Likely causes

1. Bad injector. This is usually the cause of this code but doesn't rule out
2. The possibility of one of the other causes
3. Open in the wiring to the injector
4. Short in the wiring to the injector
5. Bad PCM

What to check, in order

1. Read the code and freeze-frame data with an OBD-II scanner
2. Check the connector and wiring of the part named in the code
3. Test the part with scanner live data or a multimeter, using the values in the repair manual
4. Fix the cause, clear the code and test-drive

Related on this car

• All fault codes for this car
• Warning lights
• Where the parts are (parts map)
• Common problems

Same code on other cars

• P0203 · Toyota Passo (1st gen)
• P0203 · Toyota Corolla (11th gen, E170)
• P0203 · Toyota Corolla (10th gen, E140)
• P0203 · Honda City (5th gen, GM2)
• P0203 · Honda Civic (10th gen, FC)
• P0203 on all cars compared

← P0202 P0204 →

Clearing the code does not fix the fault. If it comes back, the problem is still there. For brakes, airbags and steering, see a trained mechanic.