P2062

Reductant/Regeneration Supply Control Circuit/Open

Q: Is it safe to drive with P2062?

Short-term yes, but the SCR system can force reduced power if the DEF supply fault persists, so don't delay the repair.

Q: Can I just clear P2062?

It returns until the open circuit or supply component is repaired.

Auxiliary emissions control Generic OBD-II Medium

What it means

P2062 means the engine computer detects an open in the reductant/regeneration supply control circuit — the circuit that delivers diesel exhaust fluid (DEF) into the SCR system. The engine still runs, but without proper DEF supply the emissions system can't do its job, and an unresolved fault often triggers a reduced-power derate, so fix it promptly.

Medium

Can I keep driving? Yes for now — the engine runs, but this diesel emissions (SCR/DEF) fault can lead to reduced power if left unfixed; repair soon.

Real-world scan data

Seen in

252

scans in the past year

Found in

<0.1%

of scans

0.1%

of scans that found faults

Appears alongside · share of P2062 scans

P202Ain 41.7% of scans

P2002in 21.8% 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
SCR/emissions warning message and possible reduced-power countdown
Failed emissions readiness or increased NOx

Common causes

Most likely first

Open circuit in the reductant/regeneration supply control wiringLikely
Faulty reductant (DEF) supply pump or control valveCommon
Damaged or corroded connector at the supply control componentCommon
Failed powertrain control module (PCM)Less often

How to diagnose & fix

Work through it in order

Read freeze-frame data and inspect the supply control connector and wiring for an open or corrosion.
Check the control circuit for continuity against the wiring diagram; repair any open found.
Test the reductant supply pump/valve operation and replace it if it doesn't respond.
If wiring and component test good, have the PCM diagnosed. Clear the code and re-test.

FAQ

Quick answers

Is it safe to drive with P2062?+

Short-term yes, but the SCR system can force reduced power if the DEF supply fault persists, so don't delay the repair.

Can I just clear P2062?+

It returns until the open circuit or supply component is repaired.

Read & clear P2062 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