P245D

EGR Cooler Bypass Control Circuit High Bank 1

Q: Is it safe to drive with P245D?

Generally yes — it is an emissions control fault, not a safety one. The car should drive normally, but repair it so EGR cooling and emissions stay correct and it can pass an emissions test.

Q: Can I just clear P245D?

You can clear it, but if the wiring or bypass valve is faulty it will return. Fix the underlying circuit first.

EGR / emissions Generic OBD-II Low

What it means

P245D means the ECM has detected an abnormally high voltage in the control circuit for the EGR cooler bypass valve on bank 1. That valve routes exhaust gas either through or around the EGR cooler to manage EGR temperature. The fault is usually electrical — wiring, a connector, or the valve itself — and it affects emissions rather than how the car drives.

Low

Can I keep driving? Yes — this is an emissions control fault; the car drives normally, but fix it to keep EGR cooling and emissions correct.

Real-world scan data

Seen in

scans in the past year

Found in

<0.1%

of scans

<0.1%

of scans that found faults

Appears alongside · share of P245D scans

P0401in 69.3% of scans

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 noticeable change in how the car drives
Possible failed emissions test
On some diesels, incomplete or delayed particulate-filter regeneration

Common causes

Most likely first

Short-to-voltage or open in the EGR cooler bypass valve control wiringLikely
Corroded or loose connector at the bypass valve/actuatorCommon
Failed EGR cooler bypass valve or its control solenoidCommon
ECM driver circuit fault (least common)Less often

How to diagnose & fix

Work through it in order

Scan and read freeze-frame data to see when the fault set.
Inspect the bypass valve connector and wiring for damage, corrosion, or a short to power.
Measure the valve/solenoid resistance and check for proper power and ground.
Replace the EGR cooler bypass valve if it fails testing.
Clear the code and re-test; suspect the ECM only if wiring and valve check good.

FAQ

Quick answers

Is it safe to drive with P245D?+

Generally yes — it is an emissions control fault, not a safety one. The car should drive normally, but repair it so EGR cooling and emissions stay correct and it can pass an emissions test.

Can I just clear P245D?+

You can clear it, but if the wiring or bypass valve is faulty it will return. Fix the underlying circuit first.

Read & clear P245D 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