P2470

Exhaust Gas Temperature Sensor Circuit Low Bank 1 Sensor 4

Q: Is it safe to drive with P2470?

Usually yes short-term, but the ECM may cut power or skip diesel-filter regeneration, so repair it before soot builds up.

Q: Can I just clear P2470?

It will return until the low-circuit fault or sensor is repaired.

Exhaust temperature / emissions Generic OBD-II Medium

What it means

P2470 means the ECM detected low voltage (a short-to-ground or open) in the exhaust gas temperature (EGT) sensor circuit for bank 1, sensor 4. This sensor reports exhaust temperature so the ECM can protect the turbo, catalyst, and diesel particulate filter. A low-circuit fault gives an unreliable reading, which can limit performance or regeneration while the engine keeps running.

Medium

Can I keep driving? Usually drivable, but the ECM may limit power or diesel-filter regeneration to protect the exhaust — have it checked soon.

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
Reduced power or limp mode in some vehicles
On diesels, disabled or incomplete particulate-filter (DPF) regeneration
Emissions-related warnings

Common causes

Most likely first

Short-to-ground or open in the EGT sensor circuitLikely
Faulty exhaust gas temperature (EGT) sensorCommon
Corroded or loose connector at the sensorCommon
Heat- or chafe-damaged wiring near the exhaustLess often
Rarely, an ECM faultLess often

How to diagnose & fix

Work through it in order

Scan for codes and record freeze-frame data.
Inspect the EGT sensor connector and wiring for a short-to-ground or open.
Measure the sensor signal voltage and compare against specification.
Check continuity of the signal and ground wires back to the ECM.
Replace the EGT sensor if it is out of spec, then clear and re-test.

FAQ

Quick answers

Is it safe to drive with P2470?+

Usually yes short-term, but the ECM may cut power or skip diesel-filter regeneration, so repair it before soot builds up.

Can I just clear P2470?+

It will return until the low-circuit fault or sensor is repaired.

Read & clear P2470 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