U033DSoftware Incompatibility With Hybrid/EV Battery Interface Control Module D
- Generic OBD-II code · Network
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- On the first-generation Chevrolet Volt the monitoring electronics end at the fourth board. GM's 2012 Volt table refers to four slave units through its own codes: P1EB2 to P1EB5 report a slave that answered wrongly or not at all when a programming session ended, and U2603 to U2606, listed in GM's U-code catalogue for the 2011 Saab 9-4X as loss of hybrid battery interface control modules 1 to 4, block the software comparison while a slave is silent. A fourth slot exists there, but GM uses its own numbers instead of U033D; in the 2018 table P1EB5 is labelled module D not programmed. A failed flash of that board thus shows up as P1EB5. U01A3 and U02A0 are the generic lost-contact and invalid-data codes for D.
- What you may notice
- Code appears after programming or replacing a battery section
- Hybrid warning, MIL possible on plug-in hybrids
- Reduced propulsion until all boards match
- Likely causes
- LikelyProgramming of the fourth board aborted or answered with an error
- PossibleReplacement board D still on a superseded software version
- RareInterrupted link to board D masks or disturbs the version check
- Inspection (ITP)
- Can matter for the ITP: it concerns the emissions system.
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €80 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.