P2602

Coolant Pump A Control Circuit Low

Q: Is it safe to drive with P2602?

Short trips may be fine, but only while watching the temperature gauge. If it climbs toward hot, stop — overheating can warp the cylinder head or damage the engine.

Q: Can I just clear P2602?

Clearing it won't help — the code returns as soon as the module sees the circuit fault again. Fix the pump or wiring first.

Engine cooling Generic OBD-II Medium

What it means

P2602 means the control module has detected low voltage in the control circuit for the electric coolant pump — usually a short to ground, an open, or a failed pump. The pump may not run when commanded, so the main risk is the engine overheating if coolant isn't being circulated. It won't stop the car from starting.

Medium

Can I keep driving? Often drivable short-term, but watch the temperature gauge — if the electric coolant pump isn't running, the engine can overheat.

Real-world scan data

Seen in

scans in the past year

Found in

<0.1%

of scans

<0.1%

of scans that found faults

Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.

Common symptoms

What you'll notice

Check-engine light on
Engine running hotter than normal, or overheating
Electric coolant pump not running or running erratically
Coolant-temperature warning in some vehicles

Common causes

Most likely first

Faulty electric coolant pumpLikely
Short to ground or low-voltage fault in the pump control wiringCommon
Corroded or loose connector at the pump or control moduleCommon
Blown fuse or relay feeding the pumpLess often
Faulty control-module (PCM/ECM) driverLess often

How to diagnose & fix

Work through it in order

Read freeze-frame and check for any coolant/overheating codes set alongside this one.
Inspect the coolant-pump connector and wiring for corrosion, chafing, or a short to ground.
Check the pump's power feed, fuse, and relay.
Test the pump directly; replace it if it won't run on command.
If wiring and pump are good, suspect the control-module driver. Clear and re-test.

FAQ

Quick answers

Is it safe to drive with P2602?+

Short trips may be fine, but only while watching the temperature gauge. If it climbs toward hot, stop — overheating can warp the cylinder head or damage the engine.

Can I just clear P2602?+

Clearing it won't help — the code returns as soon as the module sees the circuit fault again. Fix the pump or wiring first.

Read & clear P2602 yourself

Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.

▶ Get it on Google Play

✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX