FORD/MERCURY: IF DIAGNOSTIC CODE B2278 IS STORED IN POWER STEERING CONTROL MODULE (PSCM), IT NEEDS REPLACING WITH TORQUE SENSOR SERVICE KIT THAT IS AVAILABLE AND IF NOT, DOES NOT APPLY. MODEL 2008-2012 ESCAPE, 2008-2011 MARINER.
full bulletin at NHTSA ↗2009 Mercury Mariner steering problems
moderate 167 complaints filed with NHTSA · avg repair $700 · see steering across all vehicles →
Failure mileage
Complaints
167
Recalls
0
Avg fix
$700
3crashes
1injury
When does it fail?
Of the 167 steering complaints filed for the 2009 Mercury Mariner, here's the actual mileage breakdown — failures cluster heaviest at 100,000-125,000 mi.
0-25k
25-50k
50-75k
75-100k
100-125k
125-150k
150k+
Each bar shows the share of total complaints filed at that mileage range. Peak failure window highlighted. Some owners report problems earlier; some make it well past 150,000 miles symptom-free. Maintenance habits and driving conditions shift the curve as much as mileage alone.
What stands out
Steering accounts for 53% of every owner complaint on file for this vehicle — the dominant problem area across 9 categories tracked.
Owners have filed 167 steering complaints with NHTSA against this vehicle, but no formal recall covers the issue — the federal record reflects what manufacturers have admitted, not everything owners are reporting.
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering steering on this vehicle — documented repair instructions, service campaigns, or warranty extensions sent to dealers. A TSB isn't a recall (it's not a free safety remedy), but it's the manufacturer acknowledging the issue and how to fix it.
FORD/MERCURY: STEERING COLUMN POP/CLUNK NOISE ON TURNS. SOME VEHICLES MAY EXHIBIT A POP OR CLUNK NOISE FROM THE STEERING COLUMN AREA WHILE TURNING. THIS NOISE TYPICALLY OCCURS QUARTER TURN BEFORE THE STEERING WHEEL REACHES IT'S END OF TRAVEL STOP AND TYPICALLY GOES AWAY WITH WEIGHT OFF THE WHEELS.
full bulletin at NHTSA ↗FORD/MERCURY: CLUNK NOISE AT STEERING; STOPS DURING FIRST LOCK TO LOCK CYCLE. THE NOISE TYPICALLY OCCURS DURING TIGHT PARKING LOT MANEUVERS. THE CLUNK NOISE HEARD ON THE FIRST STEERING LOCK TO LOCK CYCLE IS A NORMAL CHARACTERISTIC OF THE SYSTEM.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
Owners of 2009 Mercury Mariners describe a pattern of electric power steering system failures centered on the torque sensor. Most failures involve a sudden loss of power assist while driving, requiring significantly increased steering effort—some describe manual steering as nearly impossible, especially at low speeds or during turns. Many vehicles experienced repeated or intermittent failures even after Ford's 2014 recall (14V284000), which issued only a software update rather than replacing the faulty torque sensor.
Owners report no warning lights before failure in many cases, though some note a clicking sound at the moment of failure or startup. A few experienced locked steering wheels that required stopping the vehicle. Drivers had to restart the vehicle to restore assist temporarily; some report assist eventually failing completely.
The core grievance is that Ford applied a one-size remedy—software reprogramming of the power steering control module—despite knowing three options existed. Owners cite forum discussions and their own research showing this approach inadequate. When failures recurred, dealerships quoted $1,000–$2,000 for steering column replacement. Many owners report Ford denied warranty coverage, citing the recall as closed. Some vehicles fell outside the recall's VIN range despite meeting the manufacturing criteria, while others had the recall performed before the owner purchased the vehicle, making them ineligible for second repairs under the initial remedy's narrow warranty. Long parts backorders prevented timely repairs in at least two cases.
Same Mercury Mariner steering reports on nearby years: 2008 · 2010 · 2011
Failure modes owners describe
Electric Power Steering Torque Sensor Failure
Steering torque sensor malfunction causing sudden loss of electric power assist, requiring manual steering. Failures occurred during driving at low speeds, during turns, or at startup. Many cases involved repeated or intermittent failures even after the 2014 recall software update.
When: Failures reported from 2014 onward; some occurred within weeks to months after recall software update; others years later. Mileage at failure ranged from 65,941 to 179,000 miles.
Symptoms owners cite: Sudden loss of power steering assist while driving; Steering wheel becomes extremely difficult or impossible to turn; Intermittent loss of power assist (failures recur over time); Steering wheel vibration or shaking; Clicking sound at moment of failure or at startup; Steering wheel locks or feels locked; Power steering assist fault warning message on dashboard; Power steering assist failure warning light (inconsistent appearance)
Codes mentioned: P2112, Steering torque sensor fault codes (general, per owners' research)
Repairs/costs cited: Steering column replacement quoted at $996–$2,000+ by dealerships. Torque sensor replacement needed but steering column often must be replaced as complete assembly. Parts on backorder for 6+ months in at least two cases, leaving vehicles undrivable.
Recalls/TSBs owners mention: NHTSA Campaign 14V284000 (Recall 14S05), issued 7/18/2014 for 2008–2011 Ford Escape and Mercury Mariner vehicles mfg. 8/18/2006–9/11/2010. Remedy: software update to PSCM and instrument cluster. If vehicle showed fault history at time of recall service, components would be replaced at no cost. However, owners report the software update proved insufficient and failures recurred. Many vehicles fell outside the VIN range despite meeting manufacturing window criteria. Ford refused further assistance after recall was marked closed, citing software update as completed remedy. Owners report dealerships sometimes chose software-only fix when component replacement options were available.
Power Steering Assist Loss During Operation
Complete or near-complete loss of electric power steering assist while vehicle is in motion, with no warning and no illuminated warning light in some cases. Driver experienced extreme steering effort, particularly dangerous during turns or in traffic.
When: Occurred while actively driving—during turns, in parking lots, in traffic, on highways. Most failures happened without prior warning or symptoms.
Symptoms owners cite: Abrupt loss of power steering assist during driving; Steering wheel becomes stiff and heavy, requiring both hands to turn; Almost caused accidents (nearly hit other vehicles, nearly left roadway); No warning light or message prior to failure in many cases; Buzzer alert with immediate power loss (2–3 second duration, recurring every 2–3 months); Intermittent assist loss during turns
Codes mentioned: Power steering assist fault codes (unspecified in narratives)
Repairs/costs cited: Owners unable to self-repair; required towing to dealership in many cases. Parts unavailable or on long backorder. Temporary workaround: restarting vehicle sometimes restored assist momentarily.
Recalls/TSBs owners mention: Recall 14S05 (14V284000) applied to affected vehicles, but software update did not prevent recurrence. Manufacturer refused extended coverage or second repairs, citing recall as closed and characterizing recurrences as new, unrelated incidents outside warranty. Ford required receipts from owners in hopes of future reimbursement if recall expanded, but denied those claims later.
Steering Wheel Lock or Extreme Stiffness at Startup or During Turning
Steering wheel becomes locked, stuck, or extremely difficult to turn, either at startup or during vehicle operation. Vehicle becomes unsafe to operate in some cases; one case involved torque sensor replacement causing locked steering and a gashed tire during service.
When: Occurred at startup in some cases; others during active driving, particularly when making turns. One case (Narrative #1) occurred immediately after torque sensor replacement service at dealership.
Symptoms owners cite: Steering wheel locked or nearly impossible to turn in either direction; Steering wheel extremely stiff or tight, especially when turning left or right; Steering wheel does not 'spring back' after turns (requires manual assistance); Steering wheel jerks or pulls to one side; Steering jerks, locks, then unlocks with vehicle restart
Codes mentioned: Steering assist system fault codes (narrative specifics limited)
Repairs/costs cited: Steering column replacement required in cases reported. One vehicle required replacement after service (torque sensor install); another required replacement at $1,100+. Multiple cases involved dealership diagnostic fees that were not credited toward repair.
Recalls/TSBs owners mention: Warranty limited or non-existent for vehicles outside recall VIN range or whose recall remedy (software update) was performed by prior owner. Dealerships charged diagnostic fees and quoted full steering column replacement cost to owners. Ford closed recall case once software update was applied, refusing further assistance even when failures recurred.
Steering System Failure Immediately Following Dealership Service
In one case, a torque sensor replacement service at a Ford dealership resulted in locked steering and a catastrophic gash in the driver-side tire, rendering the vehicle undrivable and unsafe. The dealership claimed pre-existing tire damage, but the owner provided evidence the tire had passed Virginia state inspection 13 days prior and was inspected by a tire shop 10 days before service.
When: 4/9/2026 (service date). Vehicle was in driving condition when delivered for torque sensor replacement appointment.
Symptoms owners cite: Locked steering wheel after torque sensor replacement; Catastrophic gash in driver-side tire sidewall; Vehicle declared unsafe by dealership staff
Repairs/costs cited: Dealership performed improper torque sensor installation. Steering column replacement on backorder. Tire damage occurred during service but dealership disputed this; owner had clear proof of pre-incident tire condition via state inspection (2/27/2026) and tire shop inspection (3/30/2026).
Recalls/TSBs owners mention: Dealership (Crossroads Ford of Prince George) claimed tire damage was pre-existing. Advised owner to pick up vehicle, then called saying it was unsafe for their employees to drive. Delayed delivery and left vehicle in condition that was unsafe to operate.
Limp Mode and Random Overheating Triggered by Power Steering Faults
When power steering assist fault occurs, vehicle enters limp mode, restricting performance. Accompanied by random overheating in some cases. Creates unpredictable driving hazard when vehicle enters limp mode mid-traffic.
When: 5+ months duration reported in one case; recurring over multiple months in another.
Symptoms owners cite: Power steering assist fault message on dashboard; Vehicle enters limp mode (reduced performance); Engine suddenly shuts down or loses power mid-intersection or mid-acceleration; Random overheating when limp mode engages; Unpredictable failures—can occur mid-turn or mid-acceleration at low speed; Battery warning light illuminates alongside steering issues
Codes mentioned: Power steering assist fault
Repairs/costs cited: No repairs attempted in cases cited; vehicle too dangerous to drive for extended periods.
Recalls/TSBs owners mention: No manufacturer response documented in these narratives.
Steering Wheel Vibration and Twitching
Steering wheel vibrates or twitches side-to-side during startup or while driving, accompanied by noise. Severity increased over time. Occurred in vehicles that had received recall software update.
When: Observed during startup and while driving; worsened over time. In one case, noticed after recall update and mechanic observed visible vibration on 12/29/2014.
Symptoms owners cite: Steering wheel vibrates and twitches side-to-side; Abnormal noise from steering system; Vibration visible to mechanic despite no diagnostic codes
Codes mentioned: No fault codes present at time of service (in at least one case)
Repairs/costs cited: Software update did not resolve vibration. Owner was told no parts replacement covered due to lack of fault code at service time, despite visible mechanical failure. Owner chose to self-repair rather than pay dealership.
Recalls/TSBs owners mention: Dealership performed software update per 2014 recall, but refused component replacement because no diagnostic code was present at time of service. Told owner to self-repair or pay out-of-pocket.
Synthesized from 167 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 10 most recent
The contact owns a 2009 Mercury Marnier. The contact stated while driving at an undisclosed speed, the steering wheel started to shake. The electric power steering (EPS) warning light was illuminated. The vehicle was taken to an independent mechanic where it was diagnosed that the steering torque sensor needed to be replaced. The vehicle was not repaired. The dealer was not notified of the…
Tl* the contact owns a 2009 mercury mariner. While driving 35 MPH, the steering wheel seized without warning. The vehicle was taken to an independent mechanic where it was diagnosed that the steering column failed and needed to be replaced. The vehicle was repaired. The manufacturer was notified of the failure. The VIN was not included in NHTSA campaign number: 14v284000 (steering) the failure…
I went in to the parking lot of the vince lombardi service station turned the car off when i went in on the way out turn the car on and i couldnt move the steering unless i really used force so if this was to happen to me while driving it would have been bad called ford they say for my vin number it does not have a recall for that however diring research i saw other mariners have a 14s05 recall…
I purchased my husband a 2009 mercury mariner very recently friday december 12/21/18 took delivery of vehicle, had it shipped up from sewell Audi, sugar land, tx. My husband drove the vehicle the day of delivery, we took it out for dinner @ a local food chain, no issues. Saturday morning, I took the vehicle out on a christmas shopping errand in the morning. The mariner drove fine and it is or…
Past 30 days while driving heard warning chime lasting about 2 seconds. No message visible on dashboard. On 12/18 while parking car warning chime and message "power steering assist failure." steering assist completely failed. Was able to drive car home (about 2 miles) - with difficulty when driving at low speed. Searched the web and found that others experienced the same issue and…
Vehicle was stationary. Started vehicle and no power steering. Called Ford was told it was fixed on july 29, 2014 due to recall but same issue has happened again. Ford refuses to fix, was told was already fixed and nothing they can do. Went to dealership where it was bought now have to pay out of pocket.
The contact owns a 2009 Mercury Mariner. The contact stated that while at a complete stop, the steering wheel was jerking independently. There was no warning light illuminated. The contact stated that upon starting the vehicle, the power steering assist failed to operate as needed. The contact stated that the power steering warning light was illuminated. The dealer and the manufacturer were…
I started the car and when I began to drive the wheel would not turn. I asked the parking garage attendant to try and he could not turn the wheel either. I had to get a flat bed tow truck to take the car from the garage to a Ford dealership. Ford told me the whole steering column needed to be replace due to faulty steering module. It cost me $1,100.17 to replace the steering column. On…
I drove my 2009 mariner 45 minutes to a nearby city. After shopping I turned on the car and had no electronic power assist. I turned the car off and back on and it returned. I parked at the next store to shop and when I returned there was no power steering until I restarted the mariner. It then worked for about a half hour on the drive home and cut out on the highway and would not come back on at…
Unknown
Had steering trouble with your 2009 Mercury Mariner?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the steering problem on the 2009 Mercury Mariner?
It's a documented issue but not catastrophic. 167 complaints have been filed. Repairs average $700 and most owners catch it before it causes a breakdown.
At what mileage does the steering typically fail?
Across the 120 complaints that reported odometer mileage, most steering failures cluster between 100,000 and 148,000 miles, with the median around 120,000. A quarter of owners report trouble before 100,000; a quarter make it past 148,000. Maintenance history matters more than the odometer alone — this is the reported failure window, not a guarantee.
What does it cost to fix?
Independent shops typically charge around $700 for steering repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to steering?
No active recalls currently cover steering issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2009/Mercury/Mariner.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.