P2603
Pump A Control Circuit HighP2603 is a generic OBD-II powertrain diagnostic trouble code: Pump A Control Circuit High. It is logged by the engine control unit when the powertrain monitor detects that a specific fault threshold has been exceeded — typically resulting in the malfunction-indicator lamp (MIL / check-engine light) being illuminated.
Detailed reference content for P2603 is being prepared. What you see above — the code's group, system, and the software disable option below — is accurate and complete; the long-form explainer, common causes, symptoms, and diagnostic steps will appear here once they have been reviewed.
Vehicles where we've handled P2603
Platforms in our catalogue with confirmed P2603 coverage.
Related powertrain codes
- P0000 — No trouble code
- P0051 — HO2S Heater Control Circuit Low (Bank 2 Sensor 1)
- P0052 — HO2S Heater Control Circuit High (Bank 2 Sensor 1)
- P0057 — HO2S Heater Control Circuit Low (Bank 2 Sensor 2)
- P0058 — HO2S Heater Control Circuit High (Bank 2 Sensor 2)
- P007A — Charge Air Cooler Temperature Sensor Circuit Bank 1
Disabling P2603 in software
RaceTune can permanently disable P2603 — and any other OBD-II diagnostic trouble code — on every ECU family we support. The monitor is disabled inside the ECU itself, so the fault stops being logged: the warning light stays off and the engine never enters limp mode for this code. The change is tied to your exact software version.
ECUs with a P2603 disable in our catalogue
Confirmed coverage from our recipe database — we support many more families. Upload your file and our identifier will match it automatically.
- Bosch EDC17C50 verified 1 software version
Software modifications affect emissions compliance and are not road-legal in many jurisdictions. RaceTune service files are intended for motorsport, off-road, and export use.
Got P2603 in your scan?
Upload your ECU file — we'll identify the exact software version and confirm whether a disable is available for your car.
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