P2241 O2 Sensor Positive Current Control Circuit Low (Bank 2 Sensor 1)

P2241 reports the pump-current circuit of the bank 2 front wide-band sensor at too low a level, typically a grounded wire or a sensor that cannot pump enough oxygen. No manufacturer publicly documents P2241 with thresholds. The bank 1 twin P2238 is described by Saab for its 2.0 turbo, where the signal must climb past 1.7 V on overrun with the injectors off; a V engine would run the same logic per bank. Ford instead files a grounded pump-current wire under P0151 and keeps P2240 for the open line. CARB demands that fuel-control sensors be checked for broken or shorted circuits and for implausible readings, with separate codes where practical. P2240 is the open circuit, P2242 the high-side fault on bank 2. Bank 2 fuelling falls back to open-loop values.

Likely causes

Symptoms

• Check engine light
• Higher fuel consumption from open-loop fuelling on bank 2

Repair estimate

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

Related codes

References: law.cornell.edu, saabwisonline.com, newtonnet.co.uk.