AutoStatsIQ
Data through Oct 2026
Model year

2020 Proterra Catalyst

Body and fuel not decoded. Owner complaints on file from no date to no date.

Recalls (8)Complaints (0)Investigations (0)Bulletins (110)
Recall campaigns covering this model year82,108 vehicles or units across those campaigns
Owner complaints0Not enough peers on file
Severity indexNoneCrash, fire, injury or death per 100
First 24 months0Complaints in its first two years
Complaints over time

Complaints about the 2020 Proterra Catalyst by year filed

Owner complaints about this model year, by the year they were filed with NHTSA.

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Source: NHTSA ODI complaints file. The lighter column runs through October.
Components

Complaints by component

Owner complaints by component. Hover or focus a bar for the crash, fire, injury or death count.

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Source: NHTSA ODI complaints file. A complaint can name more than one component; it is counted under the first.
Recalls

8 recall campaigns cover the 2020 Proterra Catalyst

Check a specific vehicle by VIN on NHTSA's site: a campaign may cover only part of a model year's production.

Recall campaigns for the 2020 Proterra Catalyst
CampaignFiledSubjectComponentVehiclesRemedy
24V-655Sep 6, 2024Vehicle controller software may allow the electrical circuit for the radiator fan to overheatElectrical system483Software update
23V-697Oct 17, 2023Transistor inside the inverter may overheat and fail, which can result in a loss of power steering and drive powerElectrical system238Part replacement
23V-078Feb 13, 2023Windshield wiper motors may operate intermittently or may fail to operateVisibility and wipers252Part replacement
22V-855Nov 18, 2022Back pressure in the shared air exhaust for the pneumatic ride height system and parking brake control valve may engage the parking brake while…Brakes386Repair or modification
22V-114Feb 28, 2022Plexus adhesive between the torque limiter plate and the bus body may be insufficient, causing the bolts that secure the steering gearbox to loosenSteering724Repair or modification
21V-268Apr 19, 2021Software defect in the body controller that operates the door motor may allow the rear door to open unexpectedlyElectrical system12Software update
20V-664Oct 28, 2020Lack of plexus adhesive between the torque plate and the vehicle chassis may cause the bolts securing the steering gear box to loosenSteering5Repair or modification
20V-621Oct 7, 2020Power steering hose located at the pump and reservoir may leak and sweat fluid through the hoseSteering8Part replacement
Source: NHTSA ODI recalls file.
Look up a VIN at NHTSA
Owner complaints

What owners reported about the 2020 Proterra Catalyst

The full text of every complaint filed with NHTSA about this model year, newest first. Complaints are filed by owners and are not verified by NHTSA; NHTSA removes personal details before publishing.

0 complaints on file.

    Source: NHTSA ODI complaints file.
    Investigations

    NHTSA has not opened an investigation on this model year

    Source: NHTSA ODI investigations file.
    All investigations
    Service bulletins

    110 manufacturer communications cover this model year

    Technical service bulletins and other notices the manufacturer sent to dealers. A bulletin is not a recall; the 60 most recent are listed.

    • SC-21-162 Dec 21, 2021 · Service Bulletin/Repair Instructions
      Pin location change on an ECU to properly assign both doors open signal and the horn relay signal.
    • SC-19-124 Oct 22, 2020 · Service Bulletin/Repair Instructions
      Transit bus repair to modify the plumbing of the hill hold solenoid to see slightly more pressure.
    • SC-20-052 Jul 22, 2022 · Service Bulletin/Repair Instructions
      Transit bus repair to specific high mirrors and replacing their mounting hardware to robust hardware.
    • SC-20-076 Nov 1, 2022 · Service Bulletin/Repair Instructions
      Transit bus repair to the electrical cabinet behind the drivers area. This bulletin updates the bracketry to be more robust in this area.
    • SC-20-081 Oct 15, 2020 · Service Bulletin/Repair Instructions
      Transit bus rear interlock solenoid retrofit to install sealed solenoid to reduce damage from road grime.
    • SC-20-092 Jul 1, 2020 · Service Bulletin/Repair Instructions
      Transit bus software update to the HVAC VFD Inverter, software patch to reduce the max operation to prevent overcurrent faults.
    • SC-20-126 Feb 12, 2021 · Service Bulletin/Repair Instructions
      Transit bus repair to replace the pressure switch with a sealed version to prevent unintended shifts to neutral.
    • SC-20-127 Mar 9, 2021 · Service Bulletin/Repair Instructions
      Transit bus repair to the air dryer governor switch due to the original not performing as well with the environmental expose.
    • SC-21-037 Jul 24, 2021 · Service Bulletin/Repair Instructions
      Transit bus repair to relocate the front interlock muffler to prevent road grime from clogging the vent.
    • SC-20-140 Jun 1, 2021 · Service Bulletin/Repair Instructions
      Transit bus repair for the rear door VIP sensors. This repair provides a clip to go behind the sensor to keep it from falling down.
    • SC-20-145 Jul 21, 2021 · Service Bulletin/Repair Instructions
      Transit bus repair to the exterior compartment for the LV batteries. The hatch gas strut brackets were only bonded in place therefore with the new brackets they use hardware to secure. Additionally longer gas struts are provided to help service the LV batte…
    • SC-20-147 Oct 21, 2020 · Service Bulletin/Repair Instructions
      Transit bus software update to support the quarterly cadence of software upgrades. This release updates a timer to the drivers seat to reduce false alarms of no driver in the seat over bouncy roads, mapped new output for horn relay. For the vehicle controll…
    • SC-20-148 Sep 1, 2021 · Service Bulletin/Repair Instructions
      Transit bus steering column maintenance document to supplement maintenance and repair manual.
    • SC-20-150 Jan 11, 2021 · Service Bulletin/Repair Instructions
      Transit bus repair to the compartment hatches over each of the wheel wells. The gas strut mounts for the hatches are now fastened with hardware to prevent debonding of the brackets.
    • SC-20-155 Feb 15, 2021 · Service Bulletin/Repair Instructions
      Transit bus repair to a coolant line under the rear hatch. New part in document is a molded hose to prevent hose from chaffing on the rear hatch.
    • SC-20-159 Mar 11, 2021 · Service Bulletin/Repair Instructions
      Transit bus repair to the side windows to include a larger sealing gasket to prevent water from entering cabin.
    • SC-20-163 Nov 23, 2020 · Service Bulletin/Repair Instructions
      Transit bus software update to increase regen in default drive and low modes to promote efficient driving. Recalibrating acceleration limiting to better achieve acceleration targets.
    • SC-20-164 Dec 17, 2020 · Service Bulletin/Repair Instructions
      Transit bus software update to the drivetrain controller. Revised controls for start up procedure, revised transmission oil pump speed for cold starts and resolved some other bugs.
    • SC-20-165 Jun 3, 2021 · Service Bulletin/Repair Instructions
      Transit bus repair to support adding drains to an internal cavity of the bus body to prevent water accumulation.
    • SC-20-169 Nov 9, 2020 · Service Bulletin/Repair Instructions
      Transit bus repair to the powersteering steering fill hose as the upper portion might leak while being filled.
    • SC-21-001 Nov 12, 2021 · Service Bulletin/Repair Instructions
      Transit bus repair to the wheel well compartment hinge. The compartment lid was previously bonded on, this repair instructions updates the vehicle to use fasteners as well.
    • SC-21-002 Jan 27, 2021 · Service Bulletin/Repair Instructions
      Transit bus hvac software update as the vendor found a bug inwhich the heater could run with out running the fan tripping the heating safety switch fault.
    • SC-21-005 Oct 12, 2021 · Service Bulletin/Repair Instructions
      Transit bus torque verification on the HV battery grounds.
    • SC-21-008 Feb 19, 2021 · Service Bulletin/Repair Instructions
      Transit bus drive axle retrofit to replace a lock washer on the transmission.
    • SC-21-020 Feb 16, 2021 · Service Bulletin/Repair Instructions
      Transit vehicle software update to the body controller and vehicle controller. Improving visibility on the dash to LV battery voltage and ABS on the dash will flash when active.
    • SC-21-021 Jun 1, 2021 · Service Bulletin/Repair Instructions
      Transit bus retrofit to upgrade parking brake release tank to 2.5 gallons.
    • SC-21-025 Apr 28, 2023 · Service Bulletin/Repair Instructions
      Transit bus retrofit to upgrade parking brake release tank to 2.5 gallons.
    • SC-21-028 May 7, 2021 · Service Bulletin/Repair Instructions
      Transit bus repair to rear axle flange bolts due to supplier communicating there might be a bad batch of hardware.
    • SC-21-032 Oct 11, 2021 · Service Bulletin/Repair Instructions
      Transit bus fuse block label update. Two fuse slots were mislabeled therefore we are replacing the label to match the physical.
    • SC-21-034 Sep 21, 2021 · Service Bulletin/Repair Instructions
      Transit bus repair to the air compressor, the previous banjo fitting was prone to leaking, the solid drain plug prevents compressor from losing oil.
    • SC-21-035 Mar 29, 2021 · Service Bulletin/Repair Instructions
      Transit bus door software update from door manufacturer to fix bugs.
    • SC-21-036 Mar 29, 2021 · Service Bulletin/Repair Instructions
      Transit bus door software update from door manufacturer to fix bugs.
    • SC-21-037 Mar 19, 2021 · Service Bulletin/Repair Instructions
      Transit bus door software update from door manufacturer to fix bugs.
    • SC-21-040 Jul 21, 2021 · Service Bulletin/Repair Instructions
      Transit bus repair to the coolant system in which a bleed line is potentially allow for aeration of the coolant. Procedure caps off this line.
    • SC-21-045 Mar 18, 2021 · Service Bulletin/Repair Instructions
      Transit bus torque verification on the intermediate steering shaft.
    • SC-21-047 Mar 23, 2021 · Service Bulletin/Repair Instructions
      Transit bus front and rear door software update provided from the door vendor.
    • SC-21-048 Aug 30, 2021 · Service Bulletin/Repair Instructions
      Transit bus fleet check to inspect the steering gearboxes and replace hardware.
    • SC-21-056 May 20, 2021 · Service Bulletin/Repair Instructions
      Transit bus repair to the HVAC, the supply air temperature sensor is being replaced to improved sealed sensor provided by our HVAC OEM. The sensor failure prevents the HVAC from running.
    • SC-21-060 Sep 9, 2021 · Service Bulletin/Repair Instructions
      Transit bus rear axle cover bolt replacement. The hardware originally installed had the wrong coating for the harness road grim.
    • SC-21-077 Jun 4, 2021 · Service Bulletin/Repair Instructions
      Transit bus software update to the batteries, charge controller and vehicle controller. Fixes coolant level LEDs, ESM updated specific parameters around temperatures and auto pack configuration, BMS SW resolves brick imbalance, min/max humidity levels.
    • SC-21-082 Feb 27, 2021 · Service Bulletin/Repair Instructions
      Transit bus repair to horn, the horn relay is retrofitted in this document with a improved relay design.
    • SC-21-083 Jan 7, 2022 · Service Bulletin/Repair Instructions
      Transit bus repair to horn, the horn relay is retrofitted in this document with a improved relay design.
    • SC-21-090 May 12, 2022 · Service Bulletin/Repair Instructions
      Transit bus repair to stanchion floor mount to better dampen the stanchion system.
    • SC-21-097 Sep 8, 2021 · Service Bulletin/Repair Instructions
      Transit bus torque verification on the 3 phase power junction box for the air compressor.
    • SC-21-106 Sep 22, 2021 · Service Bulletin/Repair Instructions
      Transit bus software to fix bugs and reduce nuisance faults. Creates new EEPROMs for specific customer requests also updates logic for vehicles exterior lights to have cornering lights while in night mode.
    • SC-21-110 Dec 3, 2021 · Service Bulletin/Repair Instructions
      Transit bus repair to the Dash wiring in which it was missing illumination on the dash when Hazards, Stop Request, and pedal adjustment when pressed. Adds power to splice pack BD050.
    • SC-21-119 Jan 4, 2022 · Service Bulletin/Repair Instructions
      Transit bus repair at the front charge port compartment to update the hardware used on the hinges to be corrosion protected.
    • SC-21-121 Aug 26, 2022 · Service Bulletin/Repair Instructions
      Transit bus repair, retrofit adds guard to prevent horn from accumulating road debris.
    • SC-21-124 Oct 25, 2021 · Service Bulletin/Repair Instructions
      Transit bus repair to the Hadley ride height adding a check valve to the exhaust side of the the interlock valve.
    • SC-21-128 May 2, 2023 · Service Bulletin/Repair Instructions
      Transit bus repair for the ADA ramp brackets, new method to secure the interior body mounting brackets for the front door ramp.
    • SC-21-130 Dec 7, 2021 · Service Bulletin/Repair Instructions
      Transit bus repair to replace mudflaps behind the rear wheels. Larger mudflaps will be installed to minimize road grime and debris from entering the rear vehicle cage, thereby offering better protection for the components in the rear of the bus.
    • SC-21-139 Dec 1, 2021 · Service Bulletin/Repair Instructions
      Transit bus software update the HVAC controllers from our supplier. Adds additional protection from over current and logic for the heater safety switch faults that can occur on shutdown and restart.
    • SC-21-142 Nov 22, 2021 · Service Bulletin/Repair Instructions
      Transit bus software update to the body controller, when flashing the EEPROMs were auto setting to 238 not 0 when a new EEPROM was loaded on the vehicle. Then fixing a bug where the door entrance lights were not 100% brightness when doors were in use.
    • SC-21-147 Oct 13, 2022 · Service Bulletin/Repair Instructions
      Transit bus repair for rear modesty panel to replace wall bracket that is prone to cracking.
    • SC-21-148 Dec 6, 2021 · Service Bulletin/Repair Instructions
      Transit bus powertrain software update to support the product to shift smoothly and reduce nuisance faults.
    • SC-21-157 Oct 14, 2022 · Service Bulletin/Repair Instructions
      Transit bus repair to add seals around the dust covers over the top of the drive axle to prevent dust from entering around the shift solenoids.
    • SC-21-158 Apr 22, 2022 · Service Bulletin/Repair Instructions
      Transit bus repair for the ADA ramp closeout bracket on the exterior of the bus. The replacement part is made from stainless steel reducing the previous mild steel that was corroding.
    • SC-21-159 Jan 22, 2022 · Service Bulletin/Repair Instructions
      Transit bus bulletin to install snorkel to air compressor to prevent water and road grim from entering the intake.
    • SC-21-161 Aug 16, 2022 · Service Bulletin/Repair Instructions
      Transit bus repair at the rear doors, door seal is screw into the body. This repair procedure includes installing inserts into the body to keep seal from coming loose.
    • SC-21-166 Apr 25, 2022 · Service Bulletin/Repair Instructions
      Transit bus repair for exterior compartments gas strut brackets. Document provides instruction to improve the securement of the fixed brackets.
    Source: NHTSA manufacturer communications files.
    About service bulletins