P24C3 code meaning
Exhaust Gas Temperature Measurement System - Multiple Sensor Correlation Bank 2
Powertrain system Generic code P24xx codes Check engine light
What P24C3 means
P24C3 is the bank 2 counterpart of P24C2 and only makes sense on engines whose two cylinder banks feed separate exhaust strings, each with its own set of temperature probes. The controller has found that the probes of the second string disagree among themselves beyond what the operating state allows. No manufacturer documents P24C3 publicly. Ford's 2023 diesel summary shows how such a group check works for bank 1: a key-on comparison after a long soak and a model comparison while driving, each probe weighed against the others. CARB requires that temperature sensors used for aftertreatment control be checked for rationality. The individual bank 2 probes have their own codes P2082, P2086, P2467 and P2474. A test with all probes cold after an overnight stop usually shows the outlier.
P24C3 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium
- Typical labor0.5 to 3 hours
- Clears after repairAfter a drive cycle
Symptoms of P24C3
- Malfunction indicator lamp on
- Particulate filter regeneration may be inhibited
Common causes of P24C3
- Most likelyOne bank 2 temperature probe has drifted and no longer matches the others
- PossibleContact resistance in a bank 2 probe connector or harness
- Less likelyExhaust leak near one probe cooling its tip
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Egt sensor b2s1Egt sensor b2s2Egt sensor b2s3Egt sensor b2s4
What each part of P24C3 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 4 | Area: auxiliary emission controls (catalytic converter, EGR, EVAP). |
| C3 | The exact fault in that area. |
What to do next
- Note P24C3 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P24C3
What does P24C3 mean?
P24C3 means "Exhaust Gas Temperature Measurement System - Multiple Sensor Correlation Bank 2". P24C3 is the bank 2 counterpart of P24C2 and only makes sense on engines whose two cylinder banks feed separate exhaust strings, each with its own set of temperature probes. It is a generic code, so it means the same on every make.
Is it safe to drive with P24C3?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P24C3 fail an emissions test?
Yes, it can. P24C3 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P24C3 to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will P24C3 clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.