P24C2Exhaust Gas Temperature Measurement System - Multiple Sensor Correlation Bank 1
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- Diesel exhaust lines often carry three or four temperature probes in a row, ahead of the oxidation catalyst, the particulate filter and the SCR catalyst. P24C2 says that on bank 1 the readings of these probes no longer agree with each other, without pinning the error on one of them. Ford's 2023 diesel summary uses it in its EGT plausibility check: after a soak of at least six hours with the engine stopped, all probes should read alike at key-on (limit 50 °C), and during the following 200 to 400 s each probe is compared with a model (±80 °C), with a fault having to persist for 20 s. Ram lists the code in bulletin 18-028-14 for the 2014 Ram 1500 with the 3.0 L diesel, cured by new PCM software. Single-probe faults are P2080, P2084, P242B and P246F. Filter regeneration may be held back.
- What you may notice
- Malfunction indicator lamp on
- Particulate filter regeneration suppressed or aborted
- Often no noticeable change in driving behaviour
- Likely causes
- LikelyOne exhaust temperature probe has drifted with age and reads too high or too low
- PossibleCorroded or heat-damaged connector adding resistance to one probe signal
- PossibleEngine control software with too tight correlation limits (update available on some models)
- RareProbes swapped between mounting positions after a repair
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €80 – €700
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.