OBD-II Code
P0890
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)
$80–$1,300
From this code's diagnostic notes. Varies by vehicle, diagnosis, parts, and local labor. This is not a repair quote.
P0890 is a TCM power relay sense circuit low fault, meaning the transmission control module is reading a low voltage on the feedback line that should be receiving battery voltage when the relay is energized.
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 procedureP0890 is a TCM power relay sense circuit low fault, meaning the transmission control module is reading a low voltage on the feedback line that should…
P0890 is a TCM power relay sense circuit low fault, meaning the transmission control module is reading a low voltage on the feedback line that should be receiving battery voltage when the relay is energized.
Cheapest first
- this code is fundamentally an electrical supply problem to the TCM, so start with the basics: load-test the battery (must hold above 9.6V during a 15-second cranking load) and clean the battery terminals and the engine-to-chassis and battery-to-chassis ground straps.
- Locate the TCM power relay in the underhood fuse box and swap it with an identical relay; if the code clears, the relay was the issue.
- If the relay is good, back-probe the relay sense wire at the TCM connector with KOEO and the relay commanded on, and verify battery voltage.
- Caveat: replacing a TCM (often $800 to $2,000 new and requiring programming) on a P0890 without verifying the relay, the relay socket, and the power and ground feeds first is one of the most common transmission-shop misdiagnoses.
Vehicle-specific patterns2002 to 2008 Dodge Ram 1500, 2500, and 3500 with the 45RFE, 545RFE, or 48RE transmissions set P0890 from the TIPM (totally integrated power module) i…
- 2002to 2008 Dodge Ram 1500, 2500, and 3500 with the 45RFE, 545RFE, or 48RE transmissions set P0890 from the TIPM (totally integrated power module) internal relay failing, a documented Chrysler defect with a class action involved.
- 2007to 2014 Chrysler 300, Dodge Charger, and Magnum with the W5A580 (Mercedes 5G-Tronic) trip P0890 from the same TIPM relay pattern.
- 2004to 2010 Ford F-150 with the 4R75E sets P0890 when the underhood power distribution box gets water intrusion from the cowl drain.
- 2008to 2012 Jeep Liberty and Grand Cherokee with the 545RFE share the Chrysler TIPM failure pattern.
Estimated repair$80 to $1,300.
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