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P0700 Transmission Control System: What It Means & What to Do
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P0700 Transmission Control System
This guide covers everything you need to know about P0700 code fix. We've researched the most common causes, real diagnostic procedures, and actual repair costs. This is one of the most searched automotive repair topics (70K+/month), so we've made it comprehensive.
Symptoms
- Check engine light
- Transmission warning light
- Harsh shifting
- Limp mode
- Slipping
Common Causes (Ranked by Likelihood)
| Cause | Likelihood | Repair Cost | DIY? |
|---|---|---|---|
| Transmission solenoid failure | 35% | $200-600 | ❌ No (shop needed) |
| Low transmission fluid | 25% | $50-150 | ✅ Yes |
| Faulty TCM (transmission control module) | 20% | $300-800 | ❌ No (shop needed) |
| Wiring/connector corrosion | 15% | $100-400 | ✅ Yes |
| Internal transmission damage | 5% | $2000-4000 | ❌ No (shop needed) |
Tools You'll Need
- OBD-II scanner with transmission module access
- Transmission fluid dipstick
- Multimeter
Step-by-Step Diagnosis
- Scan for additional transmission codes (P07xx series)
- Check transmission fluid level and condition
- Fluid should be red/pink - brown or burnt smell means trouble
- Inspect wiring harness to transmission for damage
- Test transmission solenoids with scan tool (actuation test)
- Check TCM power and ground circuits
- If fluid is dark or smells burnt, transmission needs service
Pro Tips
- P0700 is just a "check engine light for the transmission" - look for other codes
- Never ignore transmission problems - they get expensive fast
- A fluid change sometimes fixes shifting issues if caught early
Service Manuals for Your Vehicle
Every repair is easier with the factory service manual. Here are the manuals we carry for vehicles commonly affected by this issue:
Toyota Camry
- 1997 Toyota Camry Service & Repair Manual Software — $49.00 AUD
- 1998 Toyota Camry Service & Repair Manual Software — $49.00 AUD
- 1999 Toyota Camry Service & Repair Manual Software — $49.00 AUD
- 2000 Toyota Camry Service & Repair Manual Software — $49.00 AUD
- 2001 Toyota Camry Service & Repair Manual Software — $49.00 AUD
- ...and 13 more years available
Honda Accord
- 2024 Honda Accord Repair Manual | Manuals Online — $49.00 AUD
- 2014 Honda Accord Plug-In Repair Manual | Manuals Online — $49.00 AUD
- 2005 Honda Accord Hybrid Repair Manual | Manuals Online — $49.00 AUD
- 2006 Honda Accord Hybrid Repair Manual | Manuals Online — $49.00 AUD
- 2007 Honda Accord Hybrid Repair Manual | Manuals Online — $49.00 AUD
- ...and 30 more years available
Ford F-150
- 1997 Ford F-150 Service & Repair Manual Software — $49.00 AUD
- 1997-1999 Ford F-150 Service & Repair Manual — $49.00 AUD
- 1997-2003 Ford F-150 Service & Repair Manual — $49.00 AUD
- 1998 Ford F-150 Service & Repair Manual Software — $49.00 AUD
- 1999 Ford F-150 OEM Service & Repair Manual — $49.00 AUD
- ...and 16 more years available
Nissan Maxima
- 1997 Nissan Maxima Service & Repair Manual | Manuals Online — $49.00 AUD
- 1997 Nissan Maxima Service & Repair Manual Software — $49.00 AUD
- 1998 Nissan Maxima Service & Repair Manual | Manuals Online — $49.00 AUD
- 1998 Nissan Maxima Service & Repair Manual Software — $49.00 AUD
- 1999 Nissan Maxima Service & Repair Manual | Manuals Online — $49.00 AUD
- ...and 30 more years available
Chevrolet Impala
- 2000 Chevrolet Impala Service & Repair Manual Software — $49.00 AUD
- 2000 CHEVY / CHEVROLET Impala Owners Manual | Manuals Online — $49.00 AUD
- 2000 CHEVY CHEVROLET IMPALA Owners Manual - Manual 00 !! — $49.00 AUD
- 2000-2005 Chevrolet Impala Service & Repair Manual — $49.00 AUD
- 2000-2009 Chevrolet Impala Service & Repair Manual — $49.00 AUD
- ...and 37 more years available
When to Get the Full Service Manual
This guide covers the general process, but every vehicle is different. Torque specs, wiring diagrams, and procedures specific to your year and model are in the factory service manual. For $49, you get the exact procedures the dealership mechanics use—including torque specs, fluid capacities, wiring diagrams, and diagnostic flowcharts.