P2602 - Engine Coolant Pump Control Circuit Range/Performance Problem in Honda, Toyota, and Ford Vehicles

Quick Answer

P2602 means: P2602 indicates a problem with the engine coolant pump control circuit performance.

Fix: Check and replace faulty components Cost: $300 - $700 Time: 90-180 minutes

Can I drive with P2602? Immediate attention is recommended to avoid engine overheating and damage.

Common Questions

What does P2602 mean and how does it affect my car?

The P2602 code signifies a problem with the engine coolant pump control circuit. It can lead to overheating, which may cause severe engine damage if not resolved promptly. If you notice the check engine light on, it’s essential to address this issue quickly.

What are the most common causes of P2602 and how much does it cost to fix?

The most frequent causes include a faulty coolant pump (around $300-$700 to replace) and wiring issues (typically $100-$300). Regular maintenance and inspections can help catch these problems early.

Can I drive my car with P2602 or should I stop immediately?

Driving with a P2602 code can be risky, as it may lead to engine overheating. It is advisable to stop driving and have the issue diagnosed and repaired as soon as possible to avoid severe damage.

How can I diagnose P2602 myself using GeekOBD APP?

Using the GeekOBD APP, you can perform a full OBD2 scan to retrieve the P2602 code and any related codes. The app allows you to view freeze frame data, which can help you understand when the fault occurred, aiding your diagnosis.

What vehicles are most commonly affected by P2602?

The P2602 code is commonly found in 2015-2018 Honda Civics, 2014-2018 Toyota Corollas, and 2013-2017 Ford Fusions. If you own one of these models, keep an eye out for symptoms associated with this code.

How can I prevent P2602 from happening again?

Regular maintenance of your vehicle’s cooling system, including coolant flushes and inspections of the coolant pump and wiring, can help prevent the recurrence of the P2602 code.

What is P2602?

The P2602 diagnostic trouble code (DTC) indicates an issue with the engine coolant pump control circuit, specifically relating to its range or performance. This code is prevalent in various makes and models, particularly in 2015-2018 Honda Civics, 2014-2018 Toyota Corollas, and 2013-2017 Ford Fusions. When the engine control module (ECM) detects that the coolant pump is not functioning within its expected parameters, it triggers the P2602 code. The engine coolant pump plays a critical role in maintaining the optimal temperature of the engine by circulating the coolant. If this pump fails or operates inefficiently, it can lead to overheating, reduced engine performance, and potential long-term damage. Car owners may experience symptoms such as the check engine light turning on, engine overheating, or poor fuel economy. Ignoring this code can lead to severe engine issues, so timely diagnosis and repair are essential to ensure the longevity and reliability of your vehicle.

System: P - Powertrain (Engine, Transmission, Emissions)

Symptoms

Common symptoms when P2602 is present:

  • Check engine light stays on constantly, indicating a fault that needs attention.
  • Engine overheating during operation, which can lead to severe engine damage if not addressed.
  • Fuel economy decreased by 10-15%, impacting your overall driving costs.
  • Unusual engine noises, especially related to the cooling system, which can indicate pump failure.
  • Increased engine temperature readings on the dashboard gauge, signaling potential cooling issues.

Possible Causes

Most common causes of P2602 (ordered by frequency):

  1. Faulty engine coolant pump - 40% likelihood, often caused by wear and tear or electrical failure.
  2. Wiring or connector issues affecting the coolant pump circuit - 30% likelihood; look for damaged wires or loose connections.
  3. Corrosion at the pump terminals or connectors, which can disrupt electrical flow - 20% likelihood; regular inspections can help prevent this.
  4. ECM or PCM failure, though less common, can lead to incorrect readings and control issues - 5% likelihood.
  5. Obstructed coolant pathways, which can affect pump performance - 5% likelihood; maintaining clean cooling systems can reduce this risk.

P2602 Repair Costs

Cost Breakdown by Repair Type

Engine Coolant Pump Replacement

Replacing the faulty engine coolant pump to restore proper functionality.

  • Total: $300 - $700
  • Success rate: 90%
Wiring Repair

Repairing or replacing damaged wiring or connectors in the coolant pump circuit.

  • Total: $100 - $300
  • Success rate: 85%
Money-Saving Tips for P2602
  • Start with the most common and least expensive repairs first
  • Use GeekOBD APP to confirm diagnosis before replacing expensive parts
  • Consider preventive maintenance to avoid future occurrences
  • Compare prices for OEM vs aftermarket parts based on your needs
  • Address the issue promptly to prevent more expensive secondary damage

Diagnostic Steps

Professional P2602 Diagnosis Process

Follow these systematic steps to accurately diagnose P2602. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion (5-10 minutes)
GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context (10-15 minutes)
GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 3: Component testing - Use multimeter or specific diagnostic tools to test the coolant pump and its circuit (20-30 minutes)
GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 4: System function test - Verify proper operation after repairs and clear codes (10-15 minutes)
GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 5: Road test verification - Drive vehicle under various conditions to confirm repair success (15-20 minutes)
GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.

Important Notes

  • Always verify the repair with GeekOBD APP after completing diagnostic steps
  • Clear codes and test drive to ensure the problem is resolved
  • Address underlying causes to prevent code recurrence

Real Repair Case Studies

Case Study 1: Honda Civic P2602 Repair Case

Vehicle: 2016 Honda Civic, 75,000 miles

Problem: Customer reported check engine light and occasional overheating.

Diagnosis: Diagnostic scan revealed P2602. Visual inspection showed corrosion on the coolant pump connector.

Solution: Replaced the coolant pump and repaired the connector.

Cost: $450 (parts: $250, labor: $200)

Result: Check engine light cleared, and the vehicle's temperature remained stable.

Case Study 2: Toyota Corolla P2602 Resolution

Vehicle: 2017 Toyota Corolla, 60,000 miles

Problem: Owner noticed reduced fuel economy and engine overheating.

Diagnosis: P2602 code was retrieved; testing showed low voltage at the coolant pump.

Solution: Replaced the coolant pump and tightened loose wiring connections.

Cost: $350 (parts: $200, labor: $150)

Result: Fuel economy improved, and overheating issues resolved.

Diagnose P2602

Use GeekOBD APP for professional diagnosis!

  • Real-time data monitoring
  • Advanced diagnostic features
  • Step-by-step repair guidance
  • Professional-grade analysis
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Code Information

Code: P2602
System: Powertrain (Engine, Transmission, Emissions)
Severity: HIGH
Category: Engine Codes