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Home/DTC Codes/Audi/A6/2014-2014 3.0L Supercharged V6/P2603
P2603

Coolant Pump A Control Circuit High

2014-2014 Audi A6 3.0L Supercharged V6

Moderate SeverityPowertrainGeneric (SAE)

The 2014 Audi A6 is equipped with a 3.0L V6 engine. Below you'll find detailed p2603 diagnostic code information including labor time estimates, cost ranges, and technician notes specific to this engine configuration.

Description

High voltage on auxiliary coolant pump circuit.

Symptoms

  • Check engine light
  • Pump runs constantly

Common Causes

  • Open ground
  • Short to power
  • Control module issue

Diagnostic Steps

  1. Check ground circuit
  2. Measure voltage

Repair Notes

Repair wiring or replace pump.

Related Codes

P2600Coolant Pump A Control Circuit Open

Other Powertrain Codes

P2603 on Other Vehicles

Audi A3

1996-1996 1.6L I4

Audi A3

1996-1996 1.8L Turbo I4

Audi A3

1997-1997 1.6L I4

Audi A3

1997-1997 1.8L Turbo I4

Audi A3

1998-1998 1.6L I4

Audi A3

1998-1998 1.8L Turbo I4

Audi A3

1999-1999 1.6L I4

Audi A3

1999-1999 1.8L Turbo I4 Quattro

Common Questions

What does code P2603 mean on a 2014-2014 Audi A6?

P2603 stands for "Coolant Pump A Control Circuit High". High voltage on auxiliary coolant pump circuit.

What are the symptoms of P2603 on a Audi A6?

Common symptoms of P2603 include: Check engine light, Pump runs constantly.

What causes P2603 on a 2014-2014 Audi A6?

Common causes of P2603 include: Open ground, Short to power, Control module issue.

Last updated: March 2026

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