OBD-II Code
P0881
Severity
Not yet reviewed
Nobody on our side has assessed this code yet, so we are not going to guess at how serious it is.
Can you drive it
We cannot say
Treat it as unknown until a shop reads it with live data. If the check-engine light is FLASHING, stop driving as soon as it is safe to — that means an active misfire, whatever the code.
Indicative cost (USD)
$250–$1,400
From this code's diagnostic notes. Varies by vehicle, diagnosis, parts, and local labor. This is not a repair quote.
P0881 sets when the TCM power input is electrically present but the voltage is out of the rationality window for the engine and ignition state, typically reading high during key-off or low during cranking beyond what the TCM expects.
How a shop works this
Work from evidence to part, not the other way round. A code names a circuit or a symptom; it does not name the part that failed.
Note every code that is set, not just this one.
Codes that appear together usually narrow the cause faster than any one of them read alone.
Read the freeze frame — the conditions the fault was recorded under.
Cold or warm, idle or load, road speed and engine speed. A fault that only appears cold is a different fault from one that only appears under load, even with the same code on the scanner.
Confirm the fault is current rather than history.
Clear the code and see whether it returns under those same conditions. A code that does not come back may have been logged during a repair, a flat battery, or a bad connection that has since been disturbed.
Then follow the diagnostic notes further down this page, in the order they are written.
They are written in the order a shop works this code, cheapest checks first. Where they name a component, inspect its wiring and connector before replacing it.
If the code comes back after a repair, the underlying fault is still there. That is the point to bring in a scanner with live data and freeze-frame, or a shop that has one.
Common symptoms
- Check engine light
Read the full diagnostic procedureP0881 sets when the TCM power input is electrically present but the voltage is out of the rationality window for the engine and ignition state, typic…
P0881 sets when the TCM power input is electrically present but the voltage is out of the rationality window for the engine and ignition state, typically reading high during key-off or low during cranking beyond what the TCM expects.
Cheapest first
- confirm battery state-of-health with a conductance tester and verify charging-system output under load stays between 13.6V and 14.8V at idle.
- Scan-tool the TCM battery voltage PID and compare to the PCM battery voltage PID; a delta greater than 0.5V between the two modules indicates a ground or feed resistance specific to the TCM circuit.
- Caveat: a marginal battery that passes a static voltage check but fails under cranking load is the most common source of intermittent P0881.
Vehicle-specific patterns2009-2014 Chrysler vehicles with TIPM-7 see P0881 from a sticking TCM relay that closes but exhibits high contact resistance.
- 2009-2014Chrysler vehicles with TIPM-7 see P0881 from a sticking TCM relay that closes but exhibits high contact resistance.
- 2010-2016GM with the 6L80 in stop/start-equipped trucks throws P0881 from auxiliary battery aging at 4-5 years.
- 2013-2018Ram 1500 with the 8HP70 and BSG mild-hybrid system logs P0881 from DC/DC converter output droop.
- 2012-2017BMW with the ZF 8HP and brake-energy regeneration sees P0881 when the intelligent battery sensor on the negative post fails.
Estimated repair$250 to $1400.
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