P0700 on Saab: How to Diagnose & Fix
Transmission Control System Malfunction
2 Saab models · 2 documented issues · 2 critical · $120-$3,000 repair
P0700 on Saab by model: symptoms, diagnosis and fix
The automatic 9-5 can drop into limp mode (locked in a single gear until restart) and develop slipping or harsh shifts. Early versions of the 5-speed automatic introduced around 2002 had valve-body and software issues; common triggers include the torque-converter lock-up solenoid, speed-sensor faults, and degraded fluid. In limp mode the car launches in a high gear with an unlocked converter and bangs into gear on upshifts.
Common Symptoms
- Stuck in limp mode (one gear)
- Harsh or banging shifts
- Slipping between gears
- Won't pull from a stop
- Transmission warning light
How to Fix
Diagnose for solenoid/speed-sensor codes; a revised valve body (2003+ units are far more durable) or solenoid replacement often resolves it. Critically, change to synthetic ATF every 50,000-60,000 miles to prevent recurrence.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Mobil ATF 3309 JWS 3309 automatic transmission fluid, six 1-quart bottles
Specification-only path for Saab 9-5 AW55 five-speed applications whose tag/VIN and service procedure require JWS 3309. Not a valve-body repair and not for every automatic transmission.
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Sources for this issue (3)
Second-gen 9-3 (2003-2011) Sentronic 5-speed automatic is the Aisin AF33-5. Develops harsh shifts, slipping, then total failure typically by 100,000-150,000 miles. Saab's "lifetime fill" claim was the prime contributor. Failure mode includes valve body wear and torque-converter shudder.
Common Symptoms
- harsh shifts
- slipping
- shudder
- delayed engagement
- limp mode
How to Fix
Drain-and-fill ATF every 40,000-50,000 miles with Aisin AFW+ / JWS3309 (~$120-$200 DIY — ~6 quarts come out per service). If shifts are already harsh, valve body rebuild ($800-$1,500) or full transmission swap with used unit ($1,500-$2,800). New AF33 transmissions are hard to source for Saab post-bankruptcy — used is the practical option.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Mobil ATF 3309 JWS 3309 automatic transmission fluid, six 1-quart bottles
Do not use solely because the car says Sentronic; confirm transmission tag/VIN and do not assume 2.8T AF40 coverage.
As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.
P0700 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P0700 mean on a Saab?
P0700 stands for "Transmission Control System Malfunction." P0700 is a general code indicating the transmission control module (TCM) has detected a fault somewhere in the transmission control system and has requested the check engine light be turned on. By itself it doesn't pinpoint the problem — it's an 'umbrella' code that tells you to look for additional, more specific transmission codes stored alongside it. The actual fault could be electrical, a sensor, a solenoid, or an internal transmission issue. You may notice harsh or delayed shifts, slipping, or the transmission going into a protective 'limp' mode. On Saab it is documented across 2 models: 9-5, 9-3.
What are the most common causes of P0700?
The most common causes of P0700 are: Stored companion transmission codes pointing to the real fault, Faulty shift solenoid or pressure control solenoid, Low, dirty, or degraded transmission fluid, Faulty transmission speed or input/output sensor, Wiring, connector, or ground problems at the transmission, Failing transmission control module (TCM), Internal transmission mechanical wear or clutch problems, Valve body fault or sticking valves. The specific cause varies by vehicle.
How much does it cost to fix P0700 on a Saab?
Published repair estimates on Saab range from $120 to $3,000 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
Looking for P0700 on a different make?
View P0700 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.