P0202
Fuel Injector Circuit/Open - Cylinder 2
The computer is not seeing the injector for cylinder 2 work the way it should. A bad injector, damaged wiring, or poor connector contact can cause misfires, rough running, and poor power.
- SEV
- 4/5
- DRIVE
- CAUTION
- DIY
- $20-$250
- SHOP
- $150-$700
Quick answer
AI-CITATION READYWhat it means
Can you drive with it?
Most common causes
- Faulty fuel injector on cylinder 2
- Damaged, corroded, or loose injector connector or harness for cylinder 2
- Open circuit, short, or blown driver feed in the injector control wiring
Typical repair cost
DIY usually runs $20-$250. Typical shop repair lands around $150-$700, depending on the root cause.
01 / Definition
P0202 means the PCM detected an electrical fault in the fuel injector circuit for cylinder 2. The circuit may be open, shorted, have excessive resistance, or the injector may not be responding correctly when the PCM commands it.
02 / Drive status
With caution. Short trips may be possible, but driving with a dead or weak injector circuit can cause strong misfires and catalytic converter damage. Limit driving until cylinder 2 injector operation is confirmed.
03 / Symptoms
- Check engine light
- Engine misfire
- Rough idle
- Lack of power
- Fuel smell from exhaust
04 / Causes
| 1 | Faulty fuel injector on cylinder 2 | high |
|---|---|---|
| 2 | Damaged, corroded, or loose injector connector or harness for cylinder 2 | high |
| 3 | Open circuit, short, or blown driver feed in the injector control wiring | medium |
| 4 | PCM injector driver fault | medium |
05 / Diagnostic sequence
- 01Confirm P0202 and check for related misfire or fuel trim codes.
- 02Inspect the cylinder 2 injector connector for corrosion, spread terminals, or loose retention.
- 03Check the injector harness for rub-through, heat damage, or broken wires near the fuel rail.
- 04Measure injector resistance and compare it to the other injectors on the same engine.
- 05Use a noid light or scope test to verify the PCM is pulsing the cylinder 2 injector circuit correctly.
06 / Repairs
| 1 | Repair damaged wiring, grounds, or connector terminals for injector 2 | $20-$150 |
|---|---|---|
| 2 | Replace the faulty cylinder 2 fuel injector | $50-$300 |
| 3 | Repair PCM driver or power feed faults if injector control is missing | $150-$700 |
MFG / Manufacturer notes
These supplements add make-specific diagnostic framing. Pages without full matrix backing or lane approval stay guarded and canonicalize back here until they are explicitly approved for indexing.
- Open
Audi P0202
Expansion-candidate noindex child page
07 / Related codes
08 / FAQ
Will P0202 cause a misfire on cylinder 2?
Yes. If injector 2 is not being controlled correctly, cylinder 2 can misfire and the engine may shake or lose power.
Can swapping injectors help diagnose P0202?
Yes. If the fault follows the injector to another cylinder, the injector itself is likely bad.
Can wiring cause P0202 without a bad injector?
Yes. Corroded connectors, broken wires, and poor terminal tension are common causes of injector circuit codes.
09 / Source and method
- DATA BASIS
- OBD-II REFERENCE + OBD2.HELP
- METHOD
- STATIC VALIDATION
- SAFETY
- INFORMATIONAL
This page combines OBD-II diagnostic reference data with OBD2.help generated diagnostic guidance for code meaning, likely causes, and repair direction.
Publishing uses deterministic schema and build validation, plus manual spot checks on representative pages before release.
Safety-critical diagnosis and repairs should be confirmed with a qualified mechanic, especially when the vehicle is misfiring, overheating, or losing power.