P023A

Charge Air Cooler Coolant Pump A Control Circuit/Open

Q: Is it safe to drive with P023A?

For short trips, yes. This is the low-temperature coolant pump for the intercooler — if it stops, intake charge runs hotter under boost, so avoid extended hard driving until it's repaired.

Q: Can I just clear P023A?

It returns as soon as the ECM commands the pump again and sees the open circuit. Fix the wiring or pump first.

Turbo/boost — charge air cooling Generic OBD-II Low

What it means

P023A means the ECM detected an open circuit in the control wiring for the charge air cooler coolant pump 'A'. On engines with a liquid-cooled intercooler, this electric pump circulates coolant to keep intake charge temperatures down; an open circuit stops that cooling, which mainly reduces performance and raises knock risk under sustained boost rather than stopping the car.

Low

Can I keep driving? Safe to drive short-term — intake air may run hotter under sustained boost, which can reduce power and increase knock risk, so avoid extended hard driving until fixed.

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
Often no symptoms in normal driving
Higher intake temperatures and reduced power under sustained boost
Possible knock or timing pull under heavy load

Common causes

Most likely first

Open circuit in the charge air cooler coolant pump 'A' control wiringLikely
Failed coolant pump motor or its relay/fuseCommon
Corroded or disconnected connector at the pumpCommon
Faulty ECM control driver (least likely)Less often

How to diagnose & fix

Work through it in order

Read freeze-frame data and check the pump's fuse, relay, and connector for an open circuit.
Verify the pump receives voltage and ground on command; check wiring continuity.
Replace the coolant pump if it has power and ground but doesn't run.
Repair open wiring or corroded terminals as needed, then clear and re-test.

FAQ

Quick answers

Is it safe to drive with P023A?+

For short trips, yes. This is the low-temperature coolant pump for the intercooler — if it stops, intake charge runs hotter under boost, so avoid extended hard driving until it's repaired.

Can I just clear P023A?+

It returns as soon as the ECM commands the pump again and sees the open circuit. Fix the wiring or pump first.

Read & clear P023A 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