SERVICE BULLETIN - DUE TO AN IMPROPER PCM CALIBRATION, UNDER CERTAIN CONDITIONS AFTER STARTING THE ENGINE THE PCM CANNOT PROPERLY ADJUST THE AIR-FUEL RATIO. AS A RESULT, VEHICLE EMISSIONS MAY EXCEED APPLICABLE STANDARDS.
full bulletin at NHTSA ↗2012 Honda Civic electrical problems
severe Owners of the 2012 Honda Civic have filed 48 NHTSA complaints about the electrical, typically surfacing around 39,000 miles at roughly $850 to repair (U.S. federal records, as of July 2026). Source: NHTSA Office of Defects Investigation. See electrical across all vehicles →
Failure mileage
Complaints
48
Recalls
0
Avg fix
$850
| Model year | electrical complaints |
|---|---|
| 2008 Civic | 42 |
| 2009 Civic | 32 |
| 2010 Civic | 20 |
| 2011 Civic | 13 |
| 2012 Civic (this page) | 48 |
| 2013 Civic | 31 |
| 2014 Civic | 28 |
| 2015 Civic | 20 |
| 2016 Civic | 98 |
2crashes
2fires
When does it fail?
Of the 48 electrical complaints filed for the 2012 Honda Civic, here's the actual mileage breakdown — failures cluster heaviest at 50,000-75,000 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
Owners have filed 48 electrical 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.
No new NHTSA electrical complaint has been filed on this vehicle in over 11 years — the issue may be aging out of the active population.
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering electrical 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.
Dealer message - American Honda (AHM) is investigating certain 2012-2013 Civics with a complaint of an inaccurate fuel gauge. To fully understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.
full bulletin at NHTSA ↗Service bulletin - The customer states the vehicle did not start due to a low state battery charge. The vehicle?s battery sensor monitors battery condition and the PCM determines charging mode. Based on the sulfation of the battery and customer driving habits, the PCM may not select the correct charge mode.
full bulletin at NHTSA ↗Service bulletin - The customer states the vehicle did not start due to a low state of battery charge. The vehicle?s battery sensor monitors battery condition and the PCM determines charging mode. Based on the sulfation of the battery and customer driving habits, the PCM may not select the correct charge mode.
full bulletin at NHTSA ↗SERVICE BULLETIN -THE MIL COMES ON WITH DTC P0128 (COOLING SYSTEM MALFUNCTION) STORED. THE THERMOSTAT JIGGLE VALVE MAY INTERMITTENTLY STICK OPEN AND CAUSE THE PCM TO STORE DTC P0128.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
Owners describe a litany of electrical faults. Hard-start and no-crank conditions appear intermittently, sometimes requiring multiple key turns; Honda's internal Techline cited "occasional starter issues" but declined to provide documentation. Battery drain is chronic—vehicles won't start after 2–3 days parked, despite alternators testing good. Some owners have replaced batteries multiple times; one noted the problem worsened after a Honda software update. Charging system faults trigger warning lights; one owner was asked to pay $60 for a software reprogram.
Rodent damage to electrical harnesses is documented repeatedly. Owners cite soy-based wire insulation (allegedly more palatable to rodents than traditional plastic) with wires left exposed near connectors. Stalls, fuel leaks, and loss of power steering resulted; harness replacements ran $915–$1,700.
Hybrid owners report IMA Motor Power Inverter failures causing sudden engine shutdown, cascading warning lights, and loss of charging. A Technical Service Bulletin (20-030) offers 15-year/150k-mile coverage, but some dealers deny claims citing VIN mismatches.
Other faults include airbag warning lamps and deployment failure, erratic instrument panel flashing, tail light outages, VSA/ABS module failure (one at just 827 miles), and a ceiling light fire. Battery drain is so severe that one owner permanently runs headlights to maintain charge; another carries jumper cables everywhere.
Same Honda Civic electrical reports on nearby years: 2009 · 2010 · 2011 · 2013 · 2014
Failure modes owners describe
Starter malfunction - intermittent no-crank condition
Engine fails to crank on first or multiple key turns; requires repeated attempts to start. Honda service identified as 'occasional starter issues' via internal Techline reference. Starter was replaced in one documented case.
When: Intermittent; documented at varying mileage; can occur when engine is cold or hot
Symptoms owners cite: No ignition on key turn; Requires multiple key turns to start engine; No starter or solenoid sound on failed attempts
Repairs/costs cited: Starter replacement performed at Honda dealership
Recalls/TSBs owners mention: Honda Techline reference cited for 'occasional starter issues' in newer Hondas; internal document not provided to customer
Battery discharge - chronic drain
Battery dies after vehicle sits idle for 2-3 days or overnight without cause, despite alternator testing good. Battery replacement temporary fix; problem recurs within weeks to months. Owners report needing multiple new batteries and jump-starts. Software update mentioned in one case correlating with increased frequency.
When: After 2-3 days idle or overnight; various mileages reported
Symptoms owners cite: Battery dead after parking overnight or short idle period; Vehicle will not start without jump; Check charging system warning lamp illuminated; Car stutters at stops due to low battery
Repairs/costs cited: Battery replacement (multiple replacements reported); alternator tested good in several cases but problem persists; one owner installed jumper cables in trunk as workaround
Recalls/TSBs owners mention: Honda software update performed; owner noted battery drain increased after update
Charging system malfunction - alternator and software issues
Check charging system warning light illuminates; battery fails to charge properly despite alternator testing operational. One case identified charging frequency software requiring paid update ($60). Multiple battery replacements fail to resolve issue.
When: Various mileages; one case at 120,000 miles
Symptoms owners cite: Check charging system warning light on; Battery will not hold charge while driving; Low battery condition persists despite new batteries
Repairs/costs cited: Owner refused to pay $60 software update charge; Honda dealership cited 'charging frequency software update' as solution; multiple battery replacements ineffective
Recalls/TSBs owners mention: Software update offered at customer cost ($60 referenced); Honda stated issue would only be evaluated for coverage if future repair needed
Rodent-damaged wiring harness - insulation chewing
Rodents chew through electrical wiring insulation in engine compartment and other locations, causing stalls, warning lights, and loss of critical systems. Wiring harness identified as soy-based material reportedly attractive to rodents. Multiple wires exposed and unprotected near connectors. Complete harness replacement required in several cases.
When: Various mileages reported; one case documented at low miles; affects 2012 model widely
Symptoms owners cite: Engine stalls while driving; Dashboard lights illuminate with error codes; Check engine light, brake malfunction, IMA battery, charging malfunction lights; Loss of power steering; Vehicle will not accelerate; Fuel leaks from damaged fuel lines; Multiple warning lights flash; No restart capability
Repairs/costs cited: Engine room wiring harness P/N# 32200-TR0-A00 replaced; fuel line replacement; IMA inverter replacement; junction box replacement; repairs ranged $915–$1,701; comprehensive insurance (collision deductible applies); one owner reports repair cost ~$1,700 for harness replacement; roadside assistance required for towing
Recalls/TSBs owners mention: No recalls mentioned; dealership acknowledged soy-based wire insulation as known issue; customer claims Honda should be held accountable for material choice
IMA Motor Power Inverter (MPI) failure
Motor power inverter internal circuit malfunction or IGBT failure causes sudden loss of hybrid system, engine shutdown, and warning light cascade. Can occur at any mileage but often after 100k miles. Technical Service Bulletin 20-030 covers 2012–2015 Civic Hybrid MPI for 15 years/150k miles warranty, but some vehicles denied coverage despite matching VIN criteria.
When: Documented at 95,000 miles, 123,000 miles, and up to 167,842 miles; intermittent or sudden
Symptoms owners cite: IMA, braking, engine, charging, ABS lights illuminate simultaneously; Engine shuts down while driving (on highway reported); Hybrid system fails; Vehicle switches from EV motor to starter on restart; 12V battery will not charge; Check engine, brake malfunction, IMA battery, charging malfunction lights
Codes mentioned: P1437 Motor Drive Module (MDM) Short Circuit, POA78 Tmu-L Motor Power Inverter Module Internal Circuit Malfunction, P15A5 Motor Current Sensor Circuit Malfunction, P1440, B2993, B2992
Repairs/costs cited: No repairs completed in documented cases; IMA inverter replacement required (cost not specified); one case references ~$1,701 for IMA system replacement
Recalls/TSBs owners mention: Technical Service Bulletin 20-030 (Warranty Extension: 2012–2015 Civic Hybrid IMA Motor Power Inverter); some owners report denial of coverage citing VIN mismatch despite identical model/year/issue; extended warranty claim of 15 years/150k miles disputed by some dealers
Airbag system malfunction - warning indicator and deployment failure
Airbag warning light illuminates intermittently. One case showed no deployment in collision at low angle impact; another case required computer module update then entire airbag system replacement. Dealership required $300 diagnostic fee and denied warranty coverage.
When: 25,000 miles and beyond; varies
Symptoms owners cite: Airbag warning indicator illuminated; Check airbags warning message on display; Airbag failure to deploy in collision
Repairs/costs cited: Computer module update performed, then entire airbag system replacement required in one case; dealership demanded $300 upfront diagnostic fee and rejected warranty claim; repairs not completed in most cases
Recalls/TSBs owners mention: Module update attempted; Honda manufacturer stated need for 24 hours to review but no resolution documented; warranty denial by dealership
Instrument panel and dashboard electrical failures
Dashboard lights flashing erratically, warning lights coming on without cause, and display screens going dark while driving. Maintenance minder system malfunction prevents visibility of warnings. Odometer and MPG display ceases functioning or flashes intermittently.
When: Various mileages; one case at low miles
Symptoms owners cite: All instrument panel lights flash erratically; Dashboard lights turn off while driving; Speedometer display goes dark; Odometer and MPG display flashes or ceases functioning; Maintenance minder system malfunctions; Check engine light and other warning lights illuminate without driving condition change
Repairs/costs cited: Software replacement needed per one dealer (not completed); display replacement (Part # 78260-TR2-A11RM) replaced once under warranty, failed again; no repairs completed in some cases
Recalls/TSBs owners mention: Manufacturer stated no available remedy for maintenance minder malfunction; software update available in one case
Taillights and interior lighting failures
Taillights completely non-functional; dashboard and console lights partially or completely inoperative. Vehicle rendered unsafe and illegal to operate. Multiple instances reported in rental fleet.
When: Throughout vehicle operation; rental fleet reported
Symptoms owners cite: Taillights completely non-functional; Dashboard and console lights partially functional or inoperative
Repairs/costs cited: No repairs documented in complaint; rental fleet maintenance failure
Recalls/TSBs owners mention: No manufacturer response documented; rental fleet (Hertz) failed to address
VSA/ABS module electronic failure
VSA (Vehicle Stability Assist) and ABS (Anti-lock Brake System) warning lights illuminate. One case documented VSA modulator module completely fried at 827 miles (while parked, not moving). ABS/VSA module faults reported as common problem. System failure messages display on LCD screen.
When: Very early in vehicle life (827 miles documented); various mileages reported
Symptoms owners cite: VSA warning light illuminated; ABS warning light illuminated; VSA and ABS system failure message on LCD screen; Module failure while vehicle parked and stationary
Repairs/costs cited: VSA modulator module replacement; module cost ~$900; repair completed under warranty in documented case
Recalls/TSBs owners mention: Dealership repaired under warranty
TPMS (Tire Pressure Monitoring System) false warnings
TPMS warning lights illuminate despite all tires being properly inflated. Multiple sensor replacements under warranty fail to prevent recurrence. Two sensors replaced; problem continues.
When: Various mileage; recurring issue
Symptoms owners cite: TPMS warning light illuminated; Two additional warning lights activated; Information center display activated; Warning despite proper tire inflation
Repairs/costs cited: Two TPMS sensors replaced by dealership under warranty; problem recurs
Recalls/TSBs owners mention: Warranty coverage provided for sensor replacement; no permanent fix identified
Ceiling light fire hazard - electrical short
Backseat ceiling light fixture experienced electrical short causing fire. Plastic melted and dripped onto upholstery, igniting fire while vehicle was parked and idling. Owner extinguished flames with snow brush.
When: While parked and idling
Symptoms owners cite: Flames from backseat ceiling light; Plastic melting and dripping; Upholstery fire ignition; Ceiling area fire damage
Repairs/costs cited: Towed to dealership for diagnosis; no repair details provided
Recalls/TSBs owners mention: No response documented
Electrical drain causing hard-start intermittent condition
Security system or steering wheel-related circuit drains battery, preventing engine start despite good battery and alternator. Owner purchased jumper cables as permanent workaround.
When: Intermittent, recurring condition
Symptoms owners cite: Car will not start multiple times; Recurring battery drain despite good battery test; Intermittent no-crank condition
Repairs/costs cited: Owner purchased rechargeable battery and jumper cables as personal workaround; no dealer repair identified
Recalls/TSBs owners mention: None documented
Electrical fire and post-collision failure
Vehicle caught fire post-collision and burned completely. Airbags failed to deploy in frontal collision. Vehicle became fully engulfed after impact.
When: During vehicle operation; post-collision
Symptoms owners cite: Vehicle fire post-collision; Complete vehicle destruction; Airbag failure to deploy in frontal crash
Repairs/costs cited: Vehicle total loss
Recalls/TSBs owners mention: None documented
Interior lighting and media system intermittent loss
All interior lighting goes out while driving in heavy rainfall; media player crackles and stops; systems return to normal after pulling over. No lightning observed; electrical glitch suspected.
When: During heavy rainfall
Symptoms owners cite: All interior lighting goes out; Media player crackles and stops; Systems return to normal after minutes
Repairs/costs cited: No repair documented; self-correcting event
Recalls/TSBs owners mention: None
Alternator failure and replacement
Multiple alternator replacements (three reported in one case) fail to resolve chronic battery drain and hard-start condition. Owner now operates with headlights on continuously to prevent battery discharge.
When: Recurring; varying mileages
Symptoms owners cite: Battery will not charge despite alternator output; Car will not start without jump; Headlights required at all times to maintain charge
Repairs/costs cited: Three new alternators installed; problem persists; owner now operates with continuous headlights as workaround
Recalls/TSBs owners mention: None documented
Synthesized from 48 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 2 most recent
I was driving a 2012 Honda civic when the car in front of me slammed on their brakes and came to a complete stop due to something in the road. I slammed on my brakes and tried to avoid the car in front of me by swerving to the right. The driver side of the front of my car hit the back of the car in front of me. My car was completely smashed in the front. Air bags did not deploy. After I came to a…
While I was diving on 1st october night, my dash light was suddenly turned off. In Honda civic speedometer is digital, so it was turned off too. So I was driving without checking the speed. Later I took my car to a nearest Honda dealer to diagnose the problem but they refused to diagnose. I reported this problem, many times to Honda customer service but they didn't take any action so that the…
Had electrical trouble with your 2012 Honda Civic?
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 electrical problem on the 2012 Honda Civic?
It's a meaningful issue. 48 complaints have been filed and the failure mode causes operational problems for owners. Repairs average $850.
At what mileage does the electrical typically fail?
Across the 30 complaints that reported odometer mileage, most electrical failures cluster between 24,000 and 66,100 miles, with the median around 39,000. A quarter of owners report trouble before 24,000; a quarter make it past 66,100. 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 $850 for electrical 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 electrical?
No active recalls currently cover electrical 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/2012/Honda/Civic.
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.