P2429Exhaust Gas Temperature Too High (Bank 2)
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2429 reports excessive exhaust heat on bank 2 and therefore exists only on engines with two separately monitored exhaust branches, such as V diesels with an aftertreatment line per bank. No manufacturer publishes P2429. The bank 1 version P2428 is documented by GM for a 2014 diesel as an immediate Type A fault with several temperature and temperature-rise limits around the oxidation catalyst and the particulate filter; a bank 2 code would be expected to work the same way on its own sensors. CARB requires rationality monitoring for any exhaust temperature sensor that feeds a control strategy. Before replacing hardware, compare the bank 2 readings with bank 1 and look for a misfiring or leaking cylinder on that side.
- What you may notice
- Warning lamp with reduced engine power
- Unusual heat or smell from one side of the exhaust
- Likely causes
- LikelyExcessive soot burn in the bank 2 filter
- PossibleLeaking injector or misfire on bank 2 sending fuel into the exhaust
- PossibleBank 2 exhaust temperature sensor reading high
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €100 – €3,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.