Chassis, generic

C0244 PWM Brake Pressure Modulation Circuit

Check engine lightUsually off

EmissionsNot relevant

Drive cycleNot required

Limp modePossible

No public J2012 table carries C0244, and no maker documents a meaning matching the title. The only public use is Saab's, and it concerns the engine torque signal. On the 1998 9-5 with TC/ABS 5.3 the Trionic engine module reports actual torque to the brake module as a pulse-width signal; C0244 is stored when that line is open or shorted. On the 2004 9-5 with ESP the torque value arrives over the data bus, and C0244 means the engine module flagged its own value as invalid. Either way the TCS or ESP OFF lamp comes on and the function is lost, while ABS keeps working. The pulse-width idea in the title fits this signal, not a brake pressure valve. Diagnosis starts in the engine module; the current torque can be read with a scan tool.

Likely causes

Open or shorted torque signal line between engine and brake module (Saab 9-5 1998)

Fault in the engine control module that invalidates the torque value

Data bus problem between engine and brake module

Symptoms

TCS OFF or ESP OFF lamp on
No traction or stability control, ABS still active

Repair estimate

DifficultyMediumWorkshop job

Parts and labour€30–700

Time0.5–2.5 h

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

Parts involved

abs control moduleengine control moduleengine torque signal wiring

Related codes

C0241 C0242 P0856

References: saabwisonline.com, saabwisonline.com, saabwisonline.com.