P0859
P0859: Transmission Control Module (TCM) Range/Performance Issue
📖 What Does P0859 Mean?
Symptoms
- • Transmission slips
- • hesitates
- • or refuses to engage gears
- • unusual noises
- • or the 'check engine' light comes on.
Common Causes
- • Faulty transmission solenoid
- • clogged transmission filter
- • low transmission fluid level
- • faulty TCM
- • or wiring issues.
Possible Solutions
1. Check transmission fluid level and condition. 2. Inspect and clean the transmission filter. 3. Test the transmission solenoids. 4. Update the TCM software. 5. Replace the faulty solenoid or TCM if necessary.
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❓ Common Questions About P0859
Can I drive with code P0859?
You can drive for a short time, but should address code P0859 soon to avoid worsening the problem or failing an emissions test.
How much does it cost to fix P0859?
The estimated repair cost for code P0859 is between $200 and $800. This includes parts and labor for most makes and models.
Is this code easy to fix myself?
This repair is considered moderate. It may require specialized tools or significant disassembly. Professional help is recommended if you aren't an experienced DIYer.
Required Parts
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View Best Sellers ↗Related Diagnostic Codes
Other codes that may appear with P0859
P0857: Transmission Control Module (TCM) Range/Performance Problem
P0858: Transmission Range Sensor Circuit Malfunction
P0860: Transmission Control Module (TCM) Range/Performance Problem
P0861: Transmission Control Module (TCM) - Pressure Control Solenoid 'A' Circuit Low
💡 Why These Codes Are Related:
- • Similar Issues: Same root cause or component failure
- • Related Problems: Often occur together due to system interactions
- • Sequential Codes: Progressive failure stages or multiple sensors
- • Same System: Components within the same automotive system