P0890 Infiniti Code - Transmission Control Module Power Relay Sense Circuit Low
Quick Answer
The Diagnostic Trouble Code (DTC) will set if the battery voltage supplied to the Transmission Control Module (TCM) is less than 8.4 V continuously for 200 msec or the TCM power supply voltage is more than 11 V. Common causes include Faulty Transmission Control Module (TCM), Transmission Control Module harness is open or shorted, Transmission Control Module circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P0890 Infiniti indicates Transmission Control Module Power Relay Sense Circuit Low.
- Common causes
- Common causes include Faulty Transmission Control Module (TCM), Transmission Control Module harness is open or shorted, Transmission Control Module circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P0890 Infiniti Description
What are the Possible Causes of the DTC P0890 Infiniti?
- Faulty Transmission Control Module (TCM)
- Transmission Control Module harness is open or shorted
- Transmission Control Module circuit poor electrical connection
How to Fix the DTC P0890 Infiniti?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0890 Infiniti code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P0890 Infiniti Code
1. What does the OBDII code P0890 mean on an Infiniti?
P0890 indicates that the Transmission Control Module (TCM) is detecting a low voltage or malfunction in the power relay sense circuit, which affects transmission operation.
2. What are the symptoms of the P0890 code in an Infiniti?
Common symptoms include transmission not shifting properly, being stuck in a single gear (limp mode), poor acceleration, and the check engine light being illuminated.
3. What causes the P0890 code to appear on an Infiniti?
Possible causes include a faulty TCM power relay, damaged wiring or connectors, blown fuses, or an internal TCM failure.
4. Can I drive my Infiniti with the P0890 code?
It is not recommended to drive with this code, as it can lead to poor transmission performance and potentially cause further damage.
5. How do you diagnose the P0890 code on an Infiniti?
Diagnosis involves checking the TCM power relay, inspecting wiring and connectors for damage or corrosion, and testing the TCM for proper function using a diagnostic tool.
6. How do you fix the P0890 code on an Infiniti?
Repairs may include replacing the TCM power relay, repairing or replacing damaged wiring, cleaning corroded connectors, or, in rare cases, replacing the TCM.
7. Can a dead battery cause the P0890 code in an Infiniti?
A weak or dead battery can cause electrical issues, so it’s worth checking the battery and charging system as part of the diagnosis.
8. How much does it cost to fix the P0890 code on an Infiniti?
The cost varies depending on the issue, ranging from $50 for a relay replacement to $800 or more if the TCM needs replacement.
9. Will clearing the P0890 code fix the problem?
Clearing the code without fixing the underlying issue will only temporarily turn off the check engine light, and the code is likely to reappear.
10. Can a faulty alternator trigger the P0890 code in an Infiniti?
Yes, a failing alternator can cause low voltage conditions, which might trigger the P0890 code if the TCM power relay circuit is affected.
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