Home › Fault codes › P112F / 101F01 (throttle vs manifold pressure)
BMW P112F, 101F01 and 28A0: throttle angle vs intake manifold pressure
The intake manifold pressure doesn't match what the throttle position says it should be. On the N55, BMW has a bulletin; vacuum leaks and the throttle body are the usual suspects.
Last updated
Codes on this page
| Code | Definition | Source |
|---|---|---|
| P112F | Manifold absolute pressure to throttle angle: too high (bank 1), = BMW 101F01 | Factory diagnostic chart via Lemon Manuals |
| 101F01 | Throttle valve opening angle / absolute pressure intake pipe comparison: pressure too high (F-series) | SI B11 09 19 (PDF) |
| 28A0 | Same check, older DME software | SI B11 09 19 (PDF) |
P-codes are the generic OBD-II codes any reader shows. Six-character and four-character hex codes are BMW's own, read with a BMW-capable scanner; the wording is BMW's, from the source shown.
What it means
The DME predicts intake manifold pressure from throttle angle and engine speed. If the measured pressure is too high for the throttle opening, it stores 101F01 (28A0 on E-series), shown as P112F on generic tools. BMW's N55 bulletin says it can appear shortly after programming or with a customer complaint.
Can I keep driving?
Usually yes; get it checked. The engine may run normally or feel down on power. Drive normally while you arrange a diagnosis.
Usual causes on BMWs
| Cause | Cars most affected | What you notice | Evidence | Repair prices (national average) |
|---|---|---|---|---|
| After programming or an adaptation (N55) | N55 in E70, E71, E82, E84, E88, E90–E93, F01, F02, F06, F07 and others | BMW SI B11 09 19 gives the diagnosis and adaptation steps for 28A0 and 101F01. | SI B11 09 19 (PDF) | — |
| Vacuum or crankcase ventilation leak | N55 (valve cover/PCV) | Lean codes may be stored too. | — | N55 valve cover / valve cover gasket (PCV) Indie $1,225–$1,547 Dealer $2,017–$2,557 Indie owners paid $930–$1,625 Dealer owners paid $1,450–$2,076 |
| Boost/intake leak or throttle body | N55 | A leaking charge pipe or a dirty or faulty throttle body. | — | N55 charge pipe (intercooler to throttle) replacement Indie $578–$922 Dealer $1,287–$1,744 |
A bulletin isn't a recall and doesn't mean your car has the problem; open it for the exact models and build dates. Estimates are national averages built from BMW warranty labor time, regional shop rates and parts prices; open a repair for your ZIP. "Owners paid" is the middle half of sourced prices, shown where we have at least 3.
What to do
- Ask whether the car was recently programmed and whether BMW's adaptation steps were followed.
- Smoke-test the intake and crankcase ventilation.
Warnings it can bring up
Related codes
P0171 / P0174 (lean) P0299 / 120308 (underboost) All fault codes
Other BMW bulletins that mention it
- SI B12 05 13 Service Engine Soon Light Flashes with Throttle Adaptation Faults Stored E60, E82, E84, E88, E89 and others · May 2013
- SI B07 03 14 Electrical system fault codes E46, E60, E61, E63, E64 and others · Nov 2016
3 of the BMW bulletins we hold mention it in their text; these are the closest matches.
Sources
- Factory diagnostic chart via Lemon Manuals: DTC P112F = BMW DTC 101F01, manifold absolute pressure to throttle angle too high (N55)
- NHTSA: BMW technical service bulletins and recalls by VIN
Bulletins are cited in the tables above. Explanations are ours; where a source is an owner report rather than BMW, it is labelled as one.