What does fault code P200F mean?

The control module has detected a fault in the Catalyst System Over Temperature (Bank 2) (P200F). Affects cylinder bank 2 (bank 2, radiator/left side). Measurements: • Catalyst System Over Temperature (Bank 2) – Heater Resistance (Cold) (Resistance (Ω)): 2.5 - 10.0 Ω [Condition: Disconnected plug at 20°C] • Catalyst System Over Temperature (Bank 2) – Signal Voltage (Voltage (V)): 0.10 - 0.90 V, oscillating 1 - 3 Hz [Condition: Warm engine closed loop at 2000 RPM] • Catalyst System Over Temperature (Bank 2) – Pump Current (Wideband) (Current (mA)): -2.0 to +2.0 mA (0 mA at lambda 1.0) [Condition: Warm engine, closed loop] Oscilloscope: Scope the signal on a warm engine at 2000 RPM. A healthy Catalyst System Over Temperature (Bank 2) swings between 0.1 V and 0.9 V at least 8 times in 10 seconds; a lazy or flat trace indicates sensor aging or carbon buildup. (Scale: 1 s/div, 200 mV/div)

What are the symptoms of fault code P200F?

Subsystem operating efficiency falls below calibrated threshold Check Engine Light (MIL) illuminated Possible drivability or power reduction Risk of failing an emissions inspection

What causes fault code P200F?

Most likely: Catalyst System Over Temperature (Bank 2) is electrically operational but performing outside calibrated tolerance Bank 2 specific: Inspect wiring harness to cylinder bank 2 (radiator/left bank, exposed to vibration and moisture). Likely: Chafed or pinched wiring harness along the signal path to Catalyst System Over Temperature (Bank 2) Likely: Poor ground connection or excessive voltage drop (> 0.1 V) at the ground point for Catalyst System Over Temperature (Bank 2) Rare: Defective internal output driver or reference circuit in the control module for Catalyst System Over Temperature (Bank 2)

How do you fix fault code P200F?

Cross-swap the component on Bank 2 with Bank 1 to rule out mechanical oil passages and internal timing wear. Verify underlying mechanical operation and rule out blockage, vacuum leaks, or mechanical binding. Verify loaded supply voltage and harness terminal pins at Catalyst System Over Temperature (Bank 2). Check circuit continuity and ground-side voltage drop (< 0.05 V) for Catalyst System Over Temperature (Bank 2). For wideband sensors: monitor pump current (mA) and lambda in scan Live Data during snap-throttle and decel fuel cut. Mechanic tip: O2 sensors measure free oxygen, not fuel. An exhaust leak upstream of the sensor pulls in atmospheric air via venturi pulses, forcing false lean readings and causing the ECM to severely over-fuel.

Standard EOBD

P200F - Katalysatorsystem – overtemperatur (Bank 2)

Relatert:Katalysatorsystem, Ledningsnett og kontakter, Styreenhet (ECM/PCM)

System

Drivlinje (Motor og girkasse)

Kontakt oss Finn reparasjon

Teknisk beskrivelse

Styreenheten registrerer en feil i Katalysatorsystem (P200F). Gjelder sylinderbank 2 (bank 2).

Multimeter Målepunkter & Nominelle Verdier

Målepunkt / Komponent	Måletype	Nominelt Målområde	Målevilkår
Katalysatorsystem – varmemotstand (kald)	Motstand (Ω)	2.5 - 10.0 Ω	Frakoblet ved 20°C
Katalysatorsystem – signalspenning	Spenning (V)	0.10 - 0.90 V, oscillerande 1 - 3 Hz	Varm motor i sluten loop vid 2000 RPM

Katalysatorsystem – varmemotstand (kald)Motstand (Ω)

Børverdi:2.5 - 10.0 Ω

Frakoblet ved 20°C

Katalysatorsystem – signalspenningSpenning (V)

Børverdi:0.10 - 0.90 V, oscillerande 1 - 3 Hz

Varm motor i sluten loop vid 2000 RPM

Oscilloskop Kurveformanalyse

1 s/div, 200 mV/div

Mål signalspenning for Katalysatorsystem ved 2000 o/min; veksler mellom 0.1 V og 0.9 V.

Mulige årsaker

Katalysatorsystem fungerer elektrisk, men yter utenfor toleranse

Bank 2:Kontroller ledningsnettet til sylinderbank 2 (mot radiator).

Gnagd eller klemt ledningsnett fram til Katalysatorsystem

Dårlig jordforbindelse eller spenningsfall (> 0.1 V) for Katalysatorsystem

Defekt driver eller referanseutgang i styreenheten for Katalysatorsystem

Symptomer

Systemets virkningsgrad faller under kalibrert grense

Motorlampe (MIL) lyser

Mulig redusert kjørbarhet eller effekt

Risiko for underkjent EU-kontroll

Anbefalt tiltak

Bytt om komponenten mellom Bank 2 og Bank 1 for å bekrefte feilen før ny del bestilles.

Sjekk mekanisk grunnfunksjon og utelukk lekkasjer eller tette kanaler.

Sjekk matespenning og kontaktstykke ved Katalysatorsystem.

Mål kontinuitet og jordspenningsfall (< 0.05 V) for Katalysatorsystem.

For bredbåndssonde:sjekk pumpestrøm (mA) og lambdaverdier i livedata.

Mekanikerens tips

Eksoslekkasje før lambdasonden suger inn falskluft og lurer styreenheten til å fete opp blandingen unødig.

Relaterte feilkoder

P2003

Partikkelfilter (DPF) – renseeffekt under terskelverdi (Bank 2)

P201F

Pumpe for reduksjonsmiddel (AdBlue) 'A' – fastnet i på-stilling

P202F

Reduksjonsmiddel (AdBlue)/regenereringstilførsel – styrekrets urimelig måleverdi

P2039

Lufttrykksensor for reduksjonsmiddel 'A' (AdBlue) – lavt signal

Målepunkt / Komponent

Måletype

Nominelt Målområde

Målevilkår

Katalysatorsystem – varmemotstand (kald)

Motstand (Ω)

2.5 - 10.0 Ω

Frakoblet ved 20°C

Katalysatorsystem – signalspenning

Spenning (V)

0.10 - 0.90 V, oscillerande 1 - 3 Hz

Varm motor i sluten loop vid 2000 RPM